./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/busybox-1.22.0/hostid.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/busybox-1.22.0/hostid.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de0fc62ae58e6d221c3194714bc6cea21909b72dd1b37b4566b87d84683f34c8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:08:31,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:08:31,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:08:31,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:08:31,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:08:31,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:08:31,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:08:31,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:08:31,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:08:31,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:08:31,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:08:31,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:08:31,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:08:31,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:08:31,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:08:31,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:08:31,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:08:31,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:08:31,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:08:31,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:08:31,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:08:32,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:08:32,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:08:32,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:08:32,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:08:32,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:08:32,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:08:32,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:08:32,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:08:32,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:08:32,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:08:32,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:08:32,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:08:32,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:08:32,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:08:32,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:08:32,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:08:32,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:08:32,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:08:32,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:08:32,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:08:32,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2021-11-25 19:08:32,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:08:32,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:08:32,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:08:32,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:08:32,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:08:32,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:08:32,061 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:08:32,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:08:32,061 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:08:32,062 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:08:32,062 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:08:32,062 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:08:32,062 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:08:32,062 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:08:32,063 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:08:32,063 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:08:32,063 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:08:32,063 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:08:32,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:08:32,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:08:32,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:08:32,064 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:08:32,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:08:32,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:08:32,065 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:08:32,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:08:32,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:08:32,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:08:32,066 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:08:32,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:08:32,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:08:32,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:08:32,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:08:32,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:08:32,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:08:32,067 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:08:32,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:08:32,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:08:32,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:08:32,068 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_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de0fc62ae58e6d221c3194714bc6cea21909b72dd1b37b4566b87d84683f34c8 [2021-11-25 19:08:32,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:08:32,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:08:32,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:08:32,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:08:32,319 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:08:32,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/busybox-1.22.0/hostid.i [2021-11-25 19:08:32,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data/b7de39d34/ff095b5d04d34dc08b6144807adaaff3/FLAG4d47ede52 [2021-11-25 19:08:33,054 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:08:33,055 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/sv-benchmarks/c/busybox-1.22.0/hostid.i [2021-11-25 19:08:33,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data/b7de39d34/ff095b5d04d34dc08b6144807adaaff3/FLAG4d47ede52 [2021-11-25 19:08:33,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data/b7de39d34/ff095b5d04d34dc08b6144807adaaff3 [2021-11-25 19:08:33,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:08:33,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:08:33,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:08:33,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:08:33,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:08:33,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:08:33" (1/1) ... [2021-11-25 19:08:33,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c08fc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:33, skipping insertion in model container [2021-11-25 19:08:33,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:08:33" (1/1) ... [2021-11-25 19:08:33,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:08:33,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:08:34,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:08:34,376 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) [2021-11-25 19:08:34,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@692e286f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:34, skipping insertion in model container [2021-11-25 19:08:34,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:08:34,377 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 19:08:34,379 INFO L158 Benchmark]: Toolchain (without parser) took 1016.63ms. Allocated memory is still 117.4MB. Free memory was 89.3MB in the beginning and 81.9MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:08:34,380 INFO L158 Benchmark]: CDTParser took 0.85ms. Allocated memory is still 90.2MB. Free memory is still 48.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:08:34,381 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1014.94ms. Allocated memory is still 117.4MB. Free memory was 89.0MB in the beginning and 81.9MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:08:34,383 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85ms. Allocated memory is still 90.2MB. Free memory is still 48.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1014.94ms. Allocated memory is still 117.4MB. Free memory was 89.0MB in the beginning and 81.9MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1774]: 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_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/busybox-1.22.0/hostid.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de0fc62ae58e6d221c3194714bc6cea21909b72dd1b37b4566b87d84683f34c8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:08:36,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:08:36,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:08:36,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:08:36,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:08:36,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:08:36,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:08:36,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:08:36,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:08:36,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:08:36,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:08:36,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:08:36,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:08:36,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:08:36,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:08:36,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:08:36,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:08:36,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:08:36,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:08:36,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:08:36,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:08:36,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:08:36,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:08:36,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:08:36,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:08:36,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:08:36,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:08:36,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:08:36,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:08:36,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:08:36,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:08:36,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:08:36,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:08:36,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:08:36,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:08:36,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:08:36,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:08:36,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:08:36,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:08:36,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:08:36,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:08:36,646 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2021-11-25 19:08:36,691 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:08:36,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:08:36,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:08:36,692 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:08:36,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:08:36,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:08:36,693 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:08:36,694 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:08:36,694 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:08:36,694 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:08:36,695 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:08:36,695 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:08:36,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:08:36,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:08:36,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:08:36,698 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:08:36,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:08:36,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:08:36,698 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:08:36,698 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:08:36,699 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:08:36,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:08:36,699 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:08:36,699 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:08:36,700 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:08:36,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:08:36,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:08:36,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:08:36,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:08:36,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:08:36,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:08:36,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:08:36,702 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:08:36,702 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:08:36,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:08:36,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:08:36,703 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_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de0fc62ae58e6d221c3194714bc6cea21909b72dd1b37b4566b87d84683f34c8 [2021-11-25 19:08:37,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:08:37,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:08:37,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:08:37,073 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:08:37,073 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:08:37,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/busybox-1.22.0/hostid.i [2021-11-25 19:08:37,156 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data/23862532d/fd35bb457dac4ca8ad2352fc14a11520/FLAG21f89516d [2021-11-25 19:08:37,733 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:08:37,733 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/sv-benchmarks/c/busybox-1.22.0/hostid.i [2021-11-25 19:08:37,757 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data/23862532d/fd35bb457dac4ca8ad2352fc14a11520/FLAG21f89516d [2021-11-25 19:08:37,999 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/data/23862532d/fd35bb457dac4ca8ad2352fc14a11520 [2021-11-25 19:08:38,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:08:38,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:08:38,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:08:38,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:08:38,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:08:38,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:08:38" (1/1) ... [2021-11-25 19:08:38,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2badb586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:38, skipping insertion in model container [2021-11-25 19:08:38,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:08:38" (1/1) ... [2021-11-25 19:08:38,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:08:38,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:08:39,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:08:39,017 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 19:08:39,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:08:39,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:08:39,122 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:08:39,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:08:39,399 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:08:39,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39 WrapperNode [2021-11-25 19:08:39,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:08:39,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:08:39,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:08:39,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:08:39,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,486 INFO L137 Inliner]: procedures = 529, calls = 68, calls flagged for inlining = 7, calls inlined = 6, statements flattened = 137 [2021-11-25 19:08:39,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:08:39,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:08:39,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:08:39,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:08:39,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:08:39,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:08:39,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:08:39,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:08:39,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (1/1) ... [2021-11-25 19:08:39,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:08:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:39,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:08:39,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:08:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:08:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:08:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:08:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2021-11-25 19:08:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:08:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:08:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:08:39,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:08:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:08:39,658 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:08:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:08:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-25 19:08:39,969 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:08:39,971 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:08:40,700 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:08:40,706 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:08:40,706 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 19:08:40,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:08:40 BoogieIcfgContainer [2021-11-25 19:08:40,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:08:40,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:08:40,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:08:40,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:08:40,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:08:38" (1/3) ... [2021-11-25 19:08:40,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c81c30c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:08:40, skipping insertion in model container [2021-11-25 19:08:40,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:08:39" (2/3) ... [2021-11-25 19:08:40,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c81c30c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:08:40, skipping insertion in model container [2021-11-25 19:08:40,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:08:40" (3/3) ... [2021-11-25 19:08:40,717 INFO L111 eAbstractionObserver]: Analyzing ICFG hostid.i [2021-11-25 19:08:40,722 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:08:40,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2021-11-25 19:08:40,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:08:40,774 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 19:08:40,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2021-11-25 19:08:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 92 states have internal predecessors, (102), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:40,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:08:40,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:40,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:08:40,797 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:08:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:40,802 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-25 19:08:40,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:08:40,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816913910] [2021-11-25 19:08:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:40,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:08:40,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:08:40,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:08:40,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:08:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:40,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:08:40,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:41,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:08:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:41,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:08:41,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:08:41,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816913910] [2021-11-25 19:08:41,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816913910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:08:41,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:08:41,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:08:41,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308150837] [2021-11-25 19:08:41,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:08:41,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:08:41,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:08:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:08:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:08:41,132 INFO L87 Difference]: Start difference. First operand has 95 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 92 states have internal predecessors, (102), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:41,437 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-11-25 19:08:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:08:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-25 19:08:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:41,447 INFO L225 Difference]: With dead ends: 109 [2021-11-25 19:08:41,448 INFO L226 Difference]: Without dead ends: 107 [2021-11-25 19:08:41,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:08:41,457 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:41,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 88 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:08:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-25 19:08:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-11-25 19:08:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 88 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-11-25 19:08:41,512 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 3 [2021-11-25 19:08:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:41,513 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-11-25 19:08:41,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-11-25 19:08:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:08:41,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:41,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:08:41,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:41,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:08:41,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:08:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-25 19:08:41,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:08:41,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128406449] [2021-11-25 19:08:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:41,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:08:41,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:08:41,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:08:41,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:08:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:08:41,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:41,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:08:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:41,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:08:41,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:08:41,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128406449] [2021-11-25 19:08:41,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128406449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:08:41,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:08:41,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:08:41,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915785204] [2021-11-25 19:08:41,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:08:41,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:08:41,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:08:41,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:08:41,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:08:41,935 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:42,320 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2021-11-25 19:08:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:08:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-25 19:08:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:42,322 INFO L225 Difference]: With dead ends: 90 [2021-11-25 19:08:42,322 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 19:08:42,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:08:42,324 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:42,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:08:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 19:08:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-25 19:08:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 87 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-11-25 19:08:42,342 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 3 [2021-11-25 19:08:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:42,343 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-11-25 19:08:42,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-11-25 19:08:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:08:42,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:42,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:08:42,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:42,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:08:42,560 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:08:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-11-25 19:08:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:08:42,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581118887] [2021-11-25 19:08:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:42,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:08:42,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:08:42,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:08:42,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:08:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:42,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:08:42,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:42,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:08:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:42,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:08:42,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:08:42,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581118887] [2021-11-25 19:08:42,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581118887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:08:42,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:08:42,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:08:42,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068987426] [2021-11-25 19:08:42,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:08:42,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:08:42,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:08:42,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:08:42,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:08:42,844 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:43,305 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-11-25 19:08:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:08:43,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-25 19:08:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:43,306 INFO L225 Difference]: With dead ends: 94 [2021-11-25 19:08:43,306 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 19:08:43,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:08:43,308 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:43,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:08:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 19:08:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-11-25 19:08:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 89 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-11-25 19:08:43,318 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 6 [2021-11-25 19:08:43,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:43,318 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-11-25 19:08:43,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:43,318 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-11-25 19:08:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:08:43,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:43,319 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:08:43,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:43,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:08:43,526 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:08:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1261842348, now seen corresponding path program 1 times [2021-11-25 19:08:43,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:08:43,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418204358] [2021-11-25 19:08:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:43,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:08:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:08:43,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:08:43,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:08:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:43,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:08:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:43,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:08:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:43,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:45,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:08:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418204358] [2021-11-25 19:08:45,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418204358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:45,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2124769382] [2021-11-25 19:08:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:45,229 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:08:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:08:45,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:08:45,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-25 19:08:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:08:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:45,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:08:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:45,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:46,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2124769382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:46,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637524604] [2021-11-25 19:08:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:46,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:08:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:46,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:08:46,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:08:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:08:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:46,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:08:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:46,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:46,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637524604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:46,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:08:46,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-25 19:08:46,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349402633] [2021-11-25 19:08:46,795 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:08:46,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:08:46,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:08:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:08:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:08:46,796 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:48,652 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-11-25 19:08:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:08:48,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 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 10 [2021-11-25 19:08:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:48,654 INFO L225 Difference]: With dead ends: 98 [2021-11-25 19:08:48,654 INFO L226 Difference]: Without dead ends: 98 [2021-11-25 19:08:48,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:08:48,655 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 23 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:48,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 301 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 19:08:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-25 19:08:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-25 19:08:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.5873015873015872) internal successors, (100), 95 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-25 19:08:48,666 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 10 [2021-11-25 19:08:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:48,666 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-25 19:08:48,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:08:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-25 19:08:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:08:48,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:48,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:08:48,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:48,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 19:08:49,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-25 19:08:49,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:08:49,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:08:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash -821954458, now seen corresponding path program 1 times [2021-11-25 19:08:49,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:08:49,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308779330] [2021-11-25 19:08:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:49,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:08:49,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:08:49,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:08:49,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:08:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:08:49,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:49,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:49,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:08:49,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308779330] [2021-11-25 19:08:49,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308779330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:49,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380242288] [2021-11-25 19:08:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:49,627 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:08:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:08:49,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:08:49,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 19:08:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:49,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:08:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:50,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:50,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380242288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:50,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833588816] [2021-11-25 19:08:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:50,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:08:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:50,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:08:50,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:08:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:50,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:08:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:08:50,312 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 19:08:50,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-11-25 19:08:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:08:50,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:08:50,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833588816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:08:50,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-25 19:08:50,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 6, 6, 6] total 11 [2021-11-25 19:08:50,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976971228] [2021-11-25 19:08:50,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:08:50,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:08:50,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:08:50,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:08:50,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:08:50,409 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:50,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:50,655 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-11-25 19:08:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:08:50,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-25 19:08:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:50,657 INFO L225 Difference]: With dead ends: 109 [2021-11-25 19:08:50,657 INFO L226 Difference]: Without dead ends: 109 [2021-11-25 19:08:50,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:08:50,658 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 55 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:50,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 91 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:08:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-25 19:08:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2021-11-25 19:08:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.507936507936508) internal successors, (95), 90 states have internal predecessors, (95), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-11-25 19:08:50,670 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 25 [2021-11-25 19:08:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:50,670 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-11-25 19:08:50,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-11-25 19:08:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:08:50,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:50,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:08:50,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-25 19:08:50,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:51,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-25 19:08:51,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:08:51,275 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:08:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash -821954457, now seen corresponding path program 1 times [2021-11-25 19:08:51,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:08:51,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157729582] [2021-11-25 19:08:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:51,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:08:51,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:08:51,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:08:51,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:08:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:08:51,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:51,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:51,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:08:51,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157729582] [2021-11-25 19:08:51,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157729582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:51,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1726686833] [2021-11-25 19:08:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:51,677 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:08:51,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:08:51,685 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:08:51,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 19:08:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:52,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:08:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:52,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:52,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1726686833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:52,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587081322] [2021-11-25 19:08:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:52,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:08:52,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:52,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:08:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:08:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:52,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:08:52,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:52,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:52,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587081322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:52,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:08:52,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2021-11-25 19:08:52,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489681578] [2021-11-25 19:08:52,620 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:08:52,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:08:52,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:08:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:08:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:08:52,622 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:08:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:52,952 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2021-11-25 19:08:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:08:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-25 19:08:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:52,955 INFO L225 Difference]: With dead ends: 113 [2021-11-25 19:08:52,955 INFO L226 Difference]: Without dead ends: 113 [2021-11-25 19:08:52,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:08:52,959 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 264 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:52,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 518 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:08:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-25 19:08:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-25 19:08:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.3855421686746987) internal successors, (115), 110 states have internal predecessors, (115), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2021-11-25 19:08:52,987 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 25 [2021-11-25 19:08:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:52,987 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2021-11-25 19:08:52,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:08:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2021-11-25 19:08:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 19:08:52,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:52,993 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:08:53,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:53,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-25 19:08:53,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:53,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:08:53,608 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:08:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash -34072840, now seen corresponding path program 2 times [2021-11-25 19:08:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:08:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448993721] [2021-11-25 19:08:53,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:08:53,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:08:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:08:53,610 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:08:53,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:08:53,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 19:08:53,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:08:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:08:53,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:53,938 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 19:08:53,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-11-25 19:08:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-25 19:08:54,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:08:54,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:08:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448993721] [2021-11-25 19:08:54,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448993721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:08:54,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:08:54,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:08:54,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554174395] [2021-11-25 19:08:54,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:08:54,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:08:54,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:08:54,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:08:54,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:08:54,033 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:54,517 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2021-11-25 19:08:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:08:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-11-25 19:08:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:54,518 INFO L225 Difference]: With dead ends: 153 [2021-11-25 19:08:54,518 INFO L226 Difference]: Without dead ends: 153 [2021-11-25 19:08:54,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:08:54,519 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 116 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:54,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 260 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:08:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-25 19:08:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2021-11-25 19:08:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 102 states have (on average 1.4313725490196079) internal successors, (146), 128 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2021-11-25 19:08:54,532 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 45 [2021-11-25 19:08:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:54,533 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2021-11-25 19:08:54,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:08:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2021-11-25 19:08:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:08:54,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:54,535 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:08:54,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:54,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:08:54,738 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:08:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1451724117, now seen corresponding path program 1 times [2021-11-25 19:08:54,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:08:54,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252974147] [2021-11-25 19:08:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:54,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:08:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:08:54,741 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:08:54,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 19:08:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:54,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:08:54,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:55,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:55,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:08:55,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252974147] [2021-11-25 19:08:55,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252974147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:55,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113990633] [2021-11-25 19:08:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:55,463 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:08:55,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:08:55,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:08:55,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-25 19:08:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:56,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:08:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:56,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:56,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113990633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520768888] [2021-11-25 19:08:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:56,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:08:56,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:56,258 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:08:56,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:08:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:56,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:08:56,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:56,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:08:57,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:08:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:57,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:08:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:08:59,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520768888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:08:59,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:08:59,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 13, 13] total 36 [2021-11-25 19:08:59,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655017963] [2021-11-25 19:08:59,154 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:08:59,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 19:08:59,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:08:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 19:08:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:08:59,156 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:09:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:05,529 INFO L93 Difference]: Finished difference Result 193 states and 200 transitions. [2021-11-25 19:09:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:09:05,530 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-11-25 19:09:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:05,531 INFO L225 Difference]: With dead ends: 193 [2021-11-25 19:09:05,531 INFO L226 Difference]: Without dead ends: 193 [2021-11-25 19:09:05,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=563, Invalid=1887, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 19:09:05,534 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 499 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:05,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 1134 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:09:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-25 19:09:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 171. [2021-11-25 19:09:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 142 states have (on average 1.3169014084507042) internal successors, (187), 168 states have internal predecessors, (187), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2021-11-25 19:09:05,545 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 48 [2021-11-25 19:09:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:05,545 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2021-11-25 19:09:05,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:09:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2021-11-25 19:09:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:09:05,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:05,547 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:05,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:05,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:05,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-25 19:09:06,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:09:06,151 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:06,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1633693263, now seen corresponding path program 2 times [2021-11-25 19:09:06,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:06,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431556900] [2021-11-25 19:09:06,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:09:06,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:06,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:06,153 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:06,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 19:09:06,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 19:09:06,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:09:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:09:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:06,493 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 19:09:06,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-11-25 19:09:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:09:06,893 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 19:09:06,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2021-11-25 19:09:06,923 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:09:06,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-25 19:09:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:07,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:07,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:07,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431556900] [2021-11-25 19:09:07,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431556900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:07,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:07,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:09:07,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454718608] [2021-11-25 19:09:07,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:07,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:09:07,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:07,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:09:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:09:07,079 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:07,192 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2021-11-25 19:09:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:09:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-11-25 19:09:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:07,194 INFO L225 Difference]: With dead ends: 172 [2021-11-25 19:09:07,194 INFO L226 Difference]: Without dead ends: 172 [2021-11-25 19:09:07,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:09:07,196 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:07,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 435 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2021-11-25 19:09:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-25 19:09:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-11-25 19:09:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 143 states have (on average 1.3146853146853146) internal successors, (188), 169 states have internal predecessors, (188), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 190 transitions. [2021-11-25 19:09:07,202 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 190 transitions. Word has length 56 [2021-11-25 19:09:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:07,203 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 190 transitions. [2021-11-25 19:09:07,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 190 transitions. [2021-11-25 19:09:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 19:09:07,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:07,205 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:07,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:07,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:07,435 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:07,435 INFO L85 PathProgramCache]: Analyzing trace with hash 895115800, now seen corresponding path program 1 times [2021-11-25 19:09:07,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:07,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975122409] [2021-11-25 19:09:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:07,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:07,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:07,437 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:07,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 19:09:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:09:07,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:07,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:07,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:07,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975122409] [2021-11-25 19:09:07,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975122409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:07,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:07,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:07,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656079651] [2021-11-25 19:09:07,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:07,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:07,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:07,799 INFO L87 Difference]: Start difference. First operand 172 states and 190 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:08,075 INFO L93 Difference]: Finished difference Result 195 states and 222 transitions. [2021-11-25 19:09:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-11-25 19:09:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:08,082 INFO L225 Difference]: With dead ends: 195 [2021-11-25 19:09:08,082 INFO L226 Difference]: Without dead ends: 195 [2021-11-25 19:09:08,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:09:08,083 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 74 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:08,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 134 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:09:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-25 19:09:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 171. [2021-11-25 19:09:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 143 states have (on average 1.3006993006993006) internal successors, (186), 168 states have internal predecessors, (186), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2021-11-25 19:09:08,089 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 57 [2021-11-25 19:09:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:08,090 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2021-11-25 19:09:08,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2021-11-25 19:09:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 19:09:08,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:08,091 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:08,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:08,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:08,302 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash 895115801, now seen corresponding path program 1 times [2021-11-25 19:09:08,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:08,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934476505] [2021-11-25 19:09:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:08,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:08,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:08,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:08,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 19:09:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:08,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:09:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:08,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:08,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:08,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934476505] [2021-11-25 19:09:08,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934476505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:08,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:08,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:09:08,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880728818] [2021-11-25 19:09:08,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:08,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:09:08,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:09:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:09:08,708 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:09,110 INFO L93 Difference]: Finished difference Result 175 states and 181 transitions. [2021-11-25 19:09:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:09:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-11-25 19:09:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:09,113 INFO L225 Difference]: With dead ends: 175 [2021-11-25 19:09:09,113 INFO L226 Difference]: Without dead ends: 175 [2021-11-25 19:09:09,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:09:09,114 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:09,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 269 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:09:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-25 19:09:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2021-11-25 19:09:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 125 states have (on average 1.248) internal successors, (156), 150 states have internal predecessors, (156), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2021-11-25 19:09:09,119 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 57 [2021-11-25 19:09:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:09,119 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2021-11-25 19:09:09,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2021-11-25 19:09:09,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 19:09:09,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:09,121 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:09,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:09,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:09,321 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:09,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1978804018, now seen corresponding path program 1 times [2021-11-25 19:09:09,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:09,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386303112] [2021-11-25 19:09:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:09,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:09,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:09,323 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:09,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 19:09:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:09,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:09:09,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:09,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:09,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:09,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386303112] [2021-11-25 19:09:09,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386303112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:09,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:09,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:09:09,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448729395] [2021-11-25 19:09:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:09,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:09:09,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:09:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:09:09,705 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:09,973 INFO L93 Difference]: Finished difference Result 171 states and 177 transitions. [2021-11-25 19:09:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:09:09,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-11-25 19:09:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:09,975 INFO L225 Difference]: With dead ends: 171 [2021-11-25 19:09:09,975 INFO L226 Difference]: Without dead ends: 171 [2021-11-25 19:09:09,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:09:09,976 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 127 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:09,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:09:09,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-25 19:09:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2021-11-25 19:09:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 137 states have (on average 1.27007299270073) internal successors, (174), 161 states have internal predecessors, (174), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 176 transitions. [2021-11-25 19:09:09,982 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 176 transitions. Word has length 58 [2021-11-25 19:09:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:09,983 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 176 transitions. [2021-11-25 19:09:09,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 176 transitions. [2021-11-25 19:09:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 19:09:09,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:09,987 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:10,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:10,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:10,196 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1213382400, now seen corresponding path program 1 times [2021-11-25 19:09:10,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:10,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992055053] [2021-11-25 19:09:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:10,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:10,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:10,199 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:10,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 19:09:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:10,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:09:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:10,720 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-25 19:09:10,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 19:09:10,757 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 19:09:10,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-25 19:09:11,093 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:09:11,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-11-25 19:09:11,143 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:09:11,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 19:09:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:11,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:11,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:11,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992055053] [2021-11-25 19:09:11,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992055053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:11,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:11,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:09:11,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055790053] [2021-11-25 19:09:11,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:11,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:09:11,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:11,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:09:11,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:09:11,429 INFO L87 Difference]: Start difference. First operand 164 states and 176 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:11,559 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2021-11-25 19:09:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:09:11,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-11-25 19:09:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:11,560 INFO L225 Difference]: With dead ends: 164 [2021-11-25 19:09:11,561 INFO L226 Difference]: Without dead ends: 164 [2021-11-25 19:09:11,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:09:11,562 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:11,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 378 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2021-11-25 19:09:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-25 19:09:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-25 19:09:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 161 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 175 transitions. [2021-11-25 19:09:11,567 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 175 transitions. Word has length 59 [2021-11-25 19:09:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:11,568 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 175 transitions. [2021-11-25 19:09:11,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 175 transitions. [2021-11-25 19:09:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 19:09:11,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:11,569 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:11,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:11,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:11,782 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:11,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1213382399, now seen corresponding path program 1 times [2021-11-25 19:09:11,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:11,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447521445] [2021-11-25 19:09:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:11,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:11,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:11,784 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:11,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 19:09:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:12,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:09:12,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:12,216 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 19:09:12,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-25 19:09:12,254 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:09:12,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-25 19:09:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:12,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:12,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:12,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447521445] [2021-11-25 19:09:12,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447521445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:12,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:12,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:12,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059406314] [2021-11-25 19:09:12,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:12,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:12,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:12,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:12,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:12,326 INFO L87 Difference]: Start difference. First operand 164 states and 175 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:12,521 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2021-11-25 19:09:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:12,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-11-25 19:09:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:12,523 INFO L225 Difference]: With dead ends: 171 [2021-11-25 19:09:12,523 INFO L226 Difference]: Without dead ends: 171 [2021-11-25 19:09:12,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:12,524 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:12,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 118 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-11-25 19:09:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-25 19:09:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-11-25 19:09:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 142 states have (on average 1.267605633802817) internal successors, (180), 165 states have internal predecessors, (180), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 182 transitions. [2021-11-25 19:09:12,530 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 182 transitions. Word has length 59 [2021-11-25 19:09:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:12,530 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 182 transitions. [2021-11-25 19:09:12,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 182 transitions. [2021-11-25 19:09:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 19:09:12,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:12,532 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:12,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:12,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:12,738 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1430304375, now seen corresponding path program 1 times [2021-11-25 19:09:12,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:12,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837642585] [2021-11-25 19:09:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:12,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:12,740 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:12,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-25 19:09:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:13,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:09:13,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:13,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:09:13,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:09:13,447 INFO L354 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-11-25 19:09:13,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-11-25 19:09:13,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-11-25 19:09:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:13,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:13,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:13,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837642585] [2021-11-25 19:09:13,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837642585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:13,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:13,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:09:13,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327305067] [2021-11-25 19:09:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:13,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:09:13,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:09:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:09:13,592 INFO L87 Difference]: Start difference. First operand 168 states and 182 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:14,345 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2021-11-25 19:09:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:09:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-11-25 19:09:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:14,346 INFO L225 Difference]: With dead ends: 166 [2021-11-25 19:09:14,347 INFO L226 Difference]: Without dead ends: 166 [2021-11-25 19:09:14,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:09:14,348 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 70 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:14,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 270 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:09:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-25 19:09:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-11-25 19:09:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 142 states have (on average 1.2394366197183098) internal successors, (176), 163 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 178 transitions. [2021-11-25 19:09:14,353 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 178 transitions. Word has length 62 [2021-11-25 19:09:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:14,354 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 178 transitions. [2021-11-25 19:09:14,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 178 transitions. [2021-11-25 19:09:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 19:09:14,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:14,355 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:14,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-25 19:09:14,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:14,570 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1430304376, now seen corresponding path program 1 times [2021-11-25 19:09:14,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:14,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039150667] [2021-11-25 19:09:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:14,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:14,571 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:14,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 19:09:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:15,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:09:15,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:15,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 19:09:15,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:09:15,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:09:15,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:09:15,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-11-25 19:09:15,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-25 19:09:15,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-11-25 19:09:15,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 9 [2021-11-25 19:09:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:15,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:15,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039150667] [2021-11-25 19:09:15,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039150667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:15,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:15,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:09:15,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649985037] [2021-11-25 19:09:15,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:15,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:09:15,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:15,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:09:15,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:09:15,436 INFO L87 Difference]: Start difference. First operand 166 states and 178 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:16,180 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2021-11-25 19:09:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:09:16,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-11-25 19:09:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:16,182 INFO L225 Difference]: With dead ends: 165 [2021-11-25 19:09:16,182 INFO L226 Difference]: Without dead ends: 165 [2021-11-25 19:09:16,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:09:16,183 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:16,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 204 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:09:16,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-25 19:09:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-25 19:09:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 142 states have (on average 1.2253521126760563) internal successors, (174), 162 states have internal predecessors, (174), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2021-11-25 19:09:16,189 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 62 [2021-11-25 19:09:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:16,189 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2021-11-25 19:09:16,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2021-11-25 19:09:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 19:09:16,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:16,190 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:16,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:16,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:16,398 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1064372062, now seen corresponding path program 1 times [2021-11-25 19:09:16,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:16,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787150956] [2021-11-25 19:09:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:16,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:16,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:16,400 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:16,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 19:09:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:09:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:16,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-25 19:09:17,048 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:09:17,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-25 19:09:17,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:09:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:09:17,407 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:09:17,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2021-11-25 19:09:17,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2021-11-25 19:09:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:17,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:17,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:17,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787150956] [2021-11-25 19:09:17,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787150956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:17,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:17,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 19:09:17,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685413297] [2021-11-25 19:09:17,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:09:17,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:09:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:09:17,590 INFO L87 Difference]: Start difference. First operand 165 states and 176 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:18,444 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2021-11-25 19:09:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:09:18,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-11-25 19:09:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:18,446 INFO L225 Difference]: With dead ends: 186 [2021-11-25 19:09:18,446 INFO L226 Difference]: Without dead ends: 186 [2021-11-25 19:09:18,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:09:18,447 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 85 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:18,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 244 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 169 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2021-11-25 19:09:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-25 19:09:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2021-11-25 19:09:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 151 states have (on average 1.2516556291390728) internal successors, (189), 171 states have internal predecessors, (189), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 191 transitions. [2021-11-25 19:09:18,453 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 191 transitions. Word has length 66 [2021-11-25 19:09:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:18,454 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 191 transitions. [2021-11-25 19:09:18,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 191 transitions. [2021-11-25 19:09:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 19:09:18,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:18,455 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:18,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:18,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:18,666 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1064372061, now seen corresponding path program 1 times [2021-11-25 19:09:18,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:18,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232787768] [2021-11-25 19:09:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:18,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:18,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:18,668 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:18,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-25 19:09:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:09:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:19,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 19:09:19,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:09:19,299 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:09:19,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 19:09:19,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:09:19,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:09:19,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-11-25 19:09:19,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-25 19:09:19,612 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:09:19,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-11-25 19:09:19,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 19:09:19,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-11-25 19:09:19,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-11-25 19:09:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 19:09:19,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:09:19,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:09:19,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232787768] [2021-11-25 19:09:19,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232787768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:19,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:19,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 19:09:19,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832517152] [2021-11-25 19:09:19,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:19,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:09:19,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:09:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:09:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:09:19,804 INFO L87 Difference]: Start difference. First operand 174 states and 191 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:21,027 INFO L93 Difference]: Finished difference Result 186 states and 195 transitions. [2021-11-25 19:09:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:09:21,028 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-11-25 19:09:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:21,029 INFO L225 Difference]: With dead ends: 186 [2021-11-25 19:09:21,029 INFO L226 Difference]: Without dead ends: 186 [2021-11-25 19:09:21,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:09:21,030 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 102 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:21,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 244 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 19:09:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-25 19:09:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2021-11-25 19:09:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 171 states have internal predecessors, (185), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 187 transitions. [2021-11-25 19:09:21,035 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 187 transitions. Word has length 66 [2021-11-25 19:09:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:21,036 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 187 transitions. [2021-11-25 19:09:21,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:09:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 187 transitions. [2021-11-25 19:09:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 19:09:21,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:21,037 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2021-11-25 19:09:21,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:21,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:09:21,237 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-11-25 19:09:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1328353215, now seen corresponding path program 1 times [2021-11-25 19:09:21,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:09:21,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607614753] [2021-11-25 19:09:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:21,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:09:21,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:09:21,239 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:09:21,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef0cab8-caf3-4b5e-96ca-12e88bd0d152/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 19:09:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:09:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:21,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 19:09:22,031 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:09:22,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-25 19:09:22,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:09:22,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:09:22,358 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:09:22,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2021-11-25 19:09:22,521 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:09:22,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2021-11-25 19:09:22,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2021-11-25 19:09:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-25 19:09:22,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:09:22,805 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1586 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem127#1.base| v_ArrVal_1586) |c_ULTIMATE.start_main_~argv~0#1.base|) (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|)))))))))))) is different from false [2021-11-25 19:09:22,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1586 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse0 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0) v_ArrVal_1586) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0)))))))))) (_ bv1 1)))) is different from false [2021-11-25 19:09:22,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1586 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1585 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem125#1.base| v_ArrVal_1585))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1586)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1)))))))))) (_ bv1 1)))) is different from false [2021-11-25 19:09:22,919 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1586 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1585 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1585))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1586)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1)))))))))) (_ bv1 1)))) is different from false [2021-11-25 19:09:22,966 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1586 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1585 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1584 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (let ((.cse1 (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|) (_ bv8 64)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1584))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1585)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1586)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))))))))))) (_ bv1 1)))) is different from false [2021-11-25 19:09:23,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:09:23,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 86 [2021-11-25 19:09:23,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5193 treesize of output 4230 [2021-11-25 19:09:23,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4226 treesize of output 3498 [2021-11-25 19:09:23,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3498 treesize of output 3386 [2021-11-25 19:09:23,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3386 treesize of output 2644