./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:31:40,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:31:40,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:31:40,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:31:40,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:31:40,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:31:40,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:31:40,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:31:40,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:31:40,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:31:40,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:31:40,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:31:40,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:31:40,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:31:40,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:31:40,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:31:40,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:31:40,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:31:40,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:31:40,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:31:40,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:31:40,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:31:40,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:31:40,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:31:40,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:31:40,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:31:40,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:31:40,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:31:40,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:31:40,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:31:40,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:31:40,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:31:40,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:31:40,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:31:40,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:31:40,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:31:40,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:31:40,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:31:40,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:31:40,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:31:40,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:31:40,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:31:40,807 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:31:40,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:31:40,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:31:40,809 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:31:40,809 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:31:40,809 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:31:40,810 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:31:40,810 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:31:40,810 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:31:40,811 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:31:40,812 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:31:40,812 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:31:40,812 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:31:40,813 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:31:40,813 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:31:40,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:31:40,814 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:31:40,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:31:40,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:31:40,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:31:40,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:31:40,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:31:40,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:31:40,816 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:31:40,816 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:31:40,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:31:40,817 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:31:40,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:31:40,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:31:40,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:31:40,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:40,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:31:40,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:31:40,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:31:40,821 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:31:40,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:31:40,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:31:40,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:31:40,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:31:40,822 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_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-11-07 01:31:41,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:31:41,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:31:41,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:31:41,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:31:41,236 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:31:41,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-07 01:31:41,327 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data/f0b140d6a/dbd06dc163394ee99dd88c4837d81a36/FLAG6e07c515e [2021-11-07 01:31:42,091 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:31:42,106 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-07 01:31:42,159 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data/f0b140d6a/dbd06dc163394ee99dd88c4837d81a36/FLAG6e07c515e [2021-11-07 01:31:42,285 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data/f0b140d6a/dbd06dc163394ee99dd88c4837d81a36 [2021-11-07 01:31:42,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:31:42,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:31:42,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:42,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:31:42,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:31:42,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:42" (1/1) ... [2021-11-07 01:31:42,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f48446f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:42, skipping insertion in model container [2021-11-07 01:31:42,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:42" (1/1) ... [2021-11-07 01:31:42,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:31:42,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:42,895 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-07 01:31:42,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:42,940 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:31:42,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cb5a481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:42, skipping insertion in model container [2021-11-07 01:31:42,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:42,942 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:31:42,945 INFO L168 Benchmark]: Toolchain (without parser) took 651.40 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 47.1 MB in the beginning and 69.6 MB in the end (delta: -22.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:42,946 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 65.5 MB in the beginning and 65.5 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:31:42,948 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.29 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 46.8 MB in the beginning and 69.6 MB in the end (delta: -22.8 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:31:42,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory was 65.5 MB in the beginning and 65.5 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 645.29 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 46.8 MB in the beginning and 69.6 MB in the end (delta: -22.8 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:31:45,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:31:45,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:31:45,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:31:45,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:31:45,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:31:45,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:31:45,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:31:45,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:31:45,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:31:45,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:31:45,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:31:45,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:31:45,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:31:45,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:31:45,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:31:45,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:31:45,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:31:45,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:31:45,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:31:45,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:31:45,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:31:45,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:31:45,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:31:45,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:31:45,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:31:45,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:31:45,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:31:45,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:31:45,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:31:45,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:31:45,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:31:45,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:31:45,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:31:45,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:31:45,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:31:45,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:31:45,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:31:45,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:31:45,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:31:45,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:31:45,598 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:31:45,653 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:31:45,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:31:45,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:31:45,656 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:31:45,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:31:45,656 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:31:45,656 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:31:45,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:31:45,657 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:31:45,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:31:45,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:31:45,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:31:45,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:31:45,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:31:45,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:31:45,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:31:45,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:31:45,661 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:31:45,662 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:31:45,662 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:31:45,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:31:45,662 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:31:45,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:31:45,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:31:45,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:31:45,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:31:45,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:45,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:31:45,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:31:45,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:31:45,665 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:31:45,665 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:45,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:31:45,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:31:45,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:31:45,666 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_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-11-07 01:31:46,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:31:46,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:31:46,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:31:46,140 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:31:46,141 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:31:46,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-07 01:31:46,244 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data/46f1dd4f7/6cdeda2e3a5642e9a7c5e3e4cd6f1b8e/FLAG69672724d [2021-11-07 01:31:47,165 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:31:47,166 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-07 01:31:47,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data/46f1dd4f7/6cdeda2e3a5642e9a7c5e3e4cd6f1b8e/FLAG69672724d [2021-11-07 01:31:47,276 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/data/46f1dd4f7/6cdeda2e3a5642e9a7c5e3e4cd6f1b8e [2021-11-07 01:31:47,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:31:47,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:31:47,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:47,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:31:47,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:31:47,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:47" (1/1) ... [2021-11-07 01:31:47,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12cf6db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:47, skipping insertion in model container [2021-11-07 01:31:47,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:47" (1/1) ... [2021-11-07 01:31:47,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:31:47,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:48,062 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-07 01:31:48,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:48,116 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:31:48,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:31:48,269 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-07 01:31:48,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:48,289 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:31:48,440 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-07 01:31:48,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:31:48,474 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:31:48,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48 WrapperNode [2021-11-07 01:31:48,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:31:48,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:31:48,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:31:48,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:31:48,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:31:48,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:31:48,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:31:48,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:31:48,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:31:48,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:31:48,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:31:48,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:31:48,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (1/1) ... [2021-11-07 01:31:48,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:31:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:31:48,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:31:48,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:31:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:31:48,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:31:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:31:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:31:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:31:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:31:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:31:48,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:31:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:31:49,049 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:31:58,121 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:31:58,121 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:31:58,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:31:58,131 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:31:58,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:58 BoogieIcfgContainer [2021-11-07 01:31:58,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:31:58,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:31:58,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:31:58,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:31:58,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:31:47" (1/3) ... [2021-11-07 01:31:58,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168171f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:58, skipping insertion in model container [2021-11-07 01:31:58,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:48" (2/3) ... [2021-11-07 01:31:58,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168171f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:58, skipping insertion in model container [2021-11-07 01:31:58,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:58" (3/3) ... [2021-11-07 01:31:58,149 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.11.i.cil-2.c [2021-11-07 01:31:58,156 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:31:58,156 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:31:58,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:31:58,224 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:31:58,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:31:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:31:58,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:58,254 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:58,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-07 01:31:58,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:58,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766995683] [2021-11-07 01:31:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:58,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:58,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:58,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:58,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:31:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:58,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:58,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:59,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:59,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766995683] [2021-11-07 01:31:59,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766995683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:59,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:59,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:59,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974062211] [2021-11-07 01:31:59,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:59,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:59,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:59,245 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:59,485 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-07 01:31:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:31:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 01:31:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:59,504 INFO L225 Difference]: With dead ends: 566 [2021-11-07 01:31:59,504 INFO L226 Difference]: Without dead ends: 387 [2021-11-07 01:31:59,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-07 01:31:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-07 01:31:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-07 01:31:59,621 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-07 01:31:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:59,622 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-07 01:31:59,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-07 01:31:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:31:59,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:59,633 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:59,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:59,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:59,862 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1287801256, now seen corresponding path program 1 times [2021-11-07 01:31:59,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:59,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585224014] [2021-11-07 01:31:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:59,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:59,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:59,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:59,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:32:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:00,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:00,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:00,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585224014] [2021-11-07 01:32:00,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585224014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:00,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:00,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:00,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785719148] [2021-11-07 01:32:00,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:00,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:00,775 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:01,741 INFO L93 Difference]: Finished difference Result 884 states and 1359 transitions. [2021-11-07 01:32:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:01,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:32:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:01,749 INFO L225 Difference]: With dead ends: 884 [2021-11-07 01:32:01,749 INFO L226 Difference]: Without dead ends: 633 [2021-11-07 01:32:01,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-07 01:32:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 631. [2021-11-07 01:32:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.5206349206349206) internal successors, (958), 630 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 958 transitions. [2021-11-07 01:32:01,790 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 958 transitions. Word has length 61 [2021-11-07 01:32:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:01,791 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 958 transitions. [2021-11-07 01:32:01,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 958 transitions. [2021-11-07 01:32:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:32:01,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:01,797 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:01,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:32:02,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:02,011 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1861684425, now seen corresponding path program 1 times [2021-11-07 01:32:02,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:02,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401192462] [2021-11-07 01:32:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:02,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:02,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:02,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:32:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:02,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:32:02,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:32:03,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:03,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401192462] [2021-11-07 01:32:03,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401192462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:03,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:03,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:03,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860257873] [2021-11-07 01:32:03,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:03,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:03,282 INFO L87 Difference]: Start difference. First operand 631 states and 958 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:04,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:04,244 INFO L93 Difference]: Finished difference Result 1372 states and 2097 transitions. [2021-11-07 01:32:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:04,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 01:32:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:04,254 INFO L225 Difference]: With dead ends: 1372 [2021-11-07 01:32:04,254 INFO L226 Difference]: Without dead ends: 875 [2021-11-07 01:32:04,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-07 01:32:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-11-07 01:32:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.5183066361556063) internal successors, (1327), 874 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1327 transitions. [2021-11-07 01:32:04,307 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1327 transitions. Word has length 117 [2021-11-07 01:32:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:04,307 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1327 transitions. [2021-11-07 01:32:04,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1327 transitions. [2021-11-07 01:32:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 01:32:04,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:04,318 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:04,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:04,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:04,546 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1505494372, now seen corresponding path program 1 times [2021-11-07 01:32:04,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:04,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339357841] [2021-11-07 01:32:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:04,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:04,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:04,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:04,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:32:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:05,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:32:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:32:05,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:32:06,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:06,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339357841] [2021-11-07 01:32:06,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339357841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:06,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:06,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:06,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939401233] [2021-11-07 01:32:06,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:06,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:06,115 INFO L87 Difference]: Start difference. First operand 875 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:06,878 INFO L93 Difference]: Finished difference Result 1860 states and 2833 transitions. [2021-11-07 01:32:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:06,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-07 01:32:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:06,887 INFO L225 Difference]: With dead ends: 1860 [2021-11-07 01:32:06,887 INFO L226 Difference]: Without dead ends: 1119 [2021-11-07 01:32:06,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-07 01:32:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-07 01:32:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.5143112701252237) internal successors, (1693), 1118 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1693 transitions. [2021-11-07 01:32:06,938 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1693 transitions. Word has length 146 [2021-11-07 01:32:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:06,939 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1693 transitions. [2021-11-07 01:32:06,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1693 transitions. [2021-11-07 01:32:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 01:32:06,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:06,944 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:06,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:07,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:07,159 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:07,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1562257391, now seen corresponding path program 1 times [2021-11-07 01:32:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:07,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160966091] [2021-11-07 01:32:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:07,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:07,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:07,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:07,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:32:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:08,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:32:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:08,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:32:08,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:32:08,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:08,450 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:32:08,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-07 01:32:09,087 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:32:09,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 849 treesize of output 821 [2021-11-07 01:32:09,221 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:32:09,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:32:09,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:09,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:32:09,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-07 01:32:09,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,462 INFO L244 Elim1Store]: Index analysis took 152 ms [2021-11-07 01:32:09,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-07 01:32:09,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:32:09,614 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:32:09,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:32:09,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:09,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:32:09,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-07 01:32:09,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-07 01:32:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-07 01:32:10,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:10,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:10,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:32:10,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:10,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:32:11,131 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:11,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 01:32:11,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:11,145 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 01:32:11,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:11,159 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 01:32:11,185 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:11,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 01:32:11,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:11,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 01:32:11,232 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:32:11,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 01:32:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-07 01:32:11,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:11,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160966091] [2021-11-07 01:32:11,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160966091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:11,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:11,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:32:11,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510352144] [2021-11-07 01:32:11,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:32:11,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:11,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:32:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:32:11,744 INFO L87 Difference]: Start difference. First operand 1119 states and 1693 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:35,204 INFO L93 Difference]: Finished difference Result 2235 states and 3382 transitions. [2021-11-07 01:32:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:32:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-07 01:32:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:35,214 INFO L225 Difference]: With dead ends: 2235 [2021-11-07 01:32:35,214 INFO L226 Difference]: Without dead ends: 1119 [2021-11-07 01:32:35,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:32:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-07 01:32:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-07 01:32:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.513416815742397) internal successors, (1692), 1118 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1692 transitions. [2021-11-07 01:32:35,266 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1692 transitions. Word has length 170 [2021-11-07 01:32:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:35,267 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1692 transitions. [2021-11-07 01:32:35,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1692 transitions. [2021-11-07 01:32:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 01:32:35,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:35,271 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:35,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:35,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:35,494 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:35,494 INFO L85 PathProgramCache]: Analyzing trace with hash 872425901, now seen corresponding path program 1 times [2021-11-07 01:32:35,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:35,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453219557] [2021-11-07 01:32:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:35,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:35,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:35,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:35,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:32:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:36,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:32:36,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:36,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:36,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:36,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:36,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:36,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:36,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:36,715 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:32:36,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:32:36,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:36,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:36,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:37,223 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:32:37,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:32:39,055 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:32:39,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:32:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-07 01:32:39,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-07 01:32:40,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:40,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453219557] [2021-11-07 01:32:40,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453219557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:40,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:40,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:32:40,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981562153] [2021-11-07 01:32:40,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:32:40,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:40,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:32:40,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:32:40,208 INFO L87 Difference]: Start difference. First operand 1119 states and 1692 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:17,202 INFO L93 Difference]: Finished difference Result 4218 states and 6404 transitions. [2021-11-07 01:33:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:33:17,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-07 01:33:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:17,234 INFO L225 Difference]: With dead ends: 4218 [2021-11-07 01:33:17,249 INFO L226 Difference]: Without dead ends: 3109 [2021-11-07 01:33:17,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:33:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-11-07 01:33:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1343. [2021-11-07 01:33:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 1.548435171385991) internal successors, (2078), 1342 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2078 transitions. [2021-11-07 01:33:17,428 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2078 transitions. Word has length 170 [2021-11-07 01:33:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:17,429 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 2078 transitions. [2021-11-07 01:33:17,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2078 transitions. [2021-11-07 01:33:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 01:33:17,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:17,434 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:17,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:17,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:17,650 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash 437920303, now seen corresponding path program 1 times [2021-11-07 01:33:17,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:17,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328728653] [2021-11-07 01:33:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:17,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:17,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:17,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:33:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:33:18,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:18,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:18,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:18,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:18,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:19,371 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:33:19,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:33:21,287 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:33:21,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:33:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 01:33:21,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 01:33:22,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:22,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328728653] [2021-11-07 01:33:22,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328728653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:22,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:22,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:33:22,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494774585] [2021-11-07 01:33:22,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:33:22,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:33:22,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:33:22,039 INFO L87 Difference]: Start difference. First operand 1343 states and 2078 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:40,863 INFO L93 Difference]: Finished difference Result 3248 states and 5026 transitions. [2021-11-07 01:33:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:40,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-07 01:33:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:40,890 INFO L225 Difference]: With dead ends: 3248 [2021-11-07 01:33:40,890 INFO L226 Difference]: Without dead ends: 1915 [2021-11-07 01:33:40,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:40,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-11-07 01:33:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1595. [2021-11-07 01:33:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 1.5803011292346298) internal successors, (2519), 1594 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2519 transitions. [2021-11-07 01:33:41,010 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2519 transitions. Word has length 170 [2021-11-07 01:33:41,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:41,011 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2519 transitions. [2021-11-07 01:33:41,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2519 transitions. [2021-11-07 01:33:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-07 01:33:41,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:41,018 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:41,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:41,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:41,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2089364194, now seen corresponding path program 1 times [2021-11-07 01:33:41,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:41,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932291611] [2021-11-07 01:33:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:41,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:41,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:41,236 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:41,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:33:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:33:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:42,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:42,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:42,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:42,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:42,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:43,264 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:33:43,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:33:44,047 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:33:44,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:33:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:33:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:33:44,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:44,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932291611] [2021-11-07 01:33:44,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932291611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:44,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:44,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:44,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147164522] [2021-11-07 01:33:44,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:44,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:44,800 INFO L87 Difference]: Start difference. First operand 1595 states and 2519 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:21,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:21,920 INFO L93 Difference]: Finished difference Result 4734 states and 7391 transitions. [2021-11-07 01:34:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:34:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-07 01:34:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:21,945 INFO L225 Difference]: With dead ends: 4734 [2021-11-07 01:34:21,946 INFO L226 Difference]: Without dead ends: 3149 [2021-11-07 01:34:21,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:34:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2021-11-07 01:34:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 1867. [2021-11-07 01:34:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.5819935691318328) internal successors, (2952), 1866 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2952 transitions. [2021-11-07 01:34:22,228 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2952 transitions. Word has length 183 [2021-11-07 01:34:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:22,229 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2952 transitions. [2021-11-07 01:34:22,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2952 transitions. [2021-11-07 01:34:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 01:34:22,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:22,235 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:22,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:22,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:22,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:22,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1261495379, now seen corresponding path program 1 times [2021-11-07 01:34:22,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:22,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668788560] [2021-11-07 01:34:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:22,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:22,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:22,469 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:22,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:34:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:24,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:34:24,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:24,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:24,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:24,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:24,745 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:34:24,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:34:25,146 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:34:25,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:34:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:34:25,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:34:25,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:25,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668788560] [2021-11-07 01:34:25,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668788560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:25,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:25,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:25,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525973811] [2021-11-07 01:34:25,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:25,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:25,842 INFO L87 Difference]: Start difference. First operand 1867 states and 2952 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:01,709 INFO L93 Difference]: Finished difference Result 4916 states and 7645 transitions. [2021-11-07 01:35:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:35:01,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-07 01:35:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:01,728 INFO L225 Difference]: With dead ends: 4916 [2021-11-07 01:35:01,729 INFO L226 Difference]: Without dead ends: 3059 [2021-11-07 01:35:01,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:35:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2021-11-07 01:35:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 1867. [2021-11-07 01:35:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.5632368703108253) internal successors, (2917), 1866 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2917 transitions. [2021-11-07 01:35:02,008 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2917 transitions. Word has length 184 [2021-11-07 01:35:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:02,009 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2917 transitions. [2021-11-07 01:35:02,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2917 transitions. [2021-11-07 01:35:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 01:35:02,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:02,014 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:02,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 01:35:02,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:02,236 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1467880897, now seen corresponding path program 1 times [2021-11-07 01:35:02,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:02,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030027386] [2021-11-07 01:35:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:02,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:02,239 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:02,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:35:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:03,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:35:03,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:04,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:04,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:04,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:04,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:04,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:04,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:04,517 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:35:04,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:35:05,066 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:35:05,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:35:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:35:05,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:35:05,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:05,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030027386] [2021-11-07 01:35:05,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030027386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:05,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:05,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:35:05,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927253193] [2021-11-07 01:35:05,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:05,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:05,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:05,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:05,957 INFO L87 Difference]: Start difference. First operand 1867 states and 2917 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:44,332 INFO L93 Difference]: Finished difference Result 5132 states and 7935 transitions. [2021-11-07 01:35:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:35:44,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-07 01:35:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:44,349 INFO L225 Difference]: With dead ends: 5132 [2021-11-07 01:35:44,349 INFO L226 Difference]: Without dead ends: 3275 [2021-11-07 01:35:44,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:35:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-11-07 01:35:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 1975. [2021-11-07 01:35:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 1.542046605876393) internal successors, (3044), 1974 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3044 transitions. [2021-11-07 01:35:44,590 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3044 transitions. Word has length 184 [2021-11-07 01:35:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:44,590 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 3044 transitions. [2021-11-07 01:35:44,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3044 transitions. [2021-11-07 01:35:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 01:35:44,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:44,596 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:44,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 01:35:44,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:44,818 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2145835448, now seen corresponding path program 1 times [2021-11-07 01:35:44,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:44,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686337154] [2021-11-07 01:35:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:44,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:44,822 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:44,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:35:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:46,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:35:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:35:46,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:46,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:46,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:46,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:46,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:35:46,789 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:35:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:35:47,639 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:35:47,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:35:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:35:47,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:35:48,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:48,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686337154] [2021-11-07 01:35:48,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686337154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:48,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:48,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:35:48,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729614013] [2021-11-07 01:35:48,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:48,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:48,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:48,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:48,348 INFO L87 Difference]: Start difference. First operand 1975 states and 3044 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:20,071 INFO L93 Difference]: Finished difference Result 5330 states and 8162 transitions. [2021-11-07 01:36:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:36:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-07 01:36:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:20,095 INFO L225 Difference]: With dead ends: 5330 [2021-11-07 01:36:20,096 INFO L226 Difference]: Without dead ends: 3365 [2021-11-07 01:36:20,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:36:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-11-07 01:36:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2153. [2021-11-07 01:36:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 1.5343866171003717) internal successors, (3302), 2152 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3302 transitions. [2021-11-07 01:36:20,270 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3302 transitions. Word has length 184 [2021-11-07 01:36:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:20,271 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3302 transitions. [2021-11-07 01:36:20,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3302 transitions. [2021-11-07 01:36:20,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 01:36:20,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:20,278 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:20,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:20,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:20,494 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:36:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:20,494 INFO L85 PathProgramCache]: Analyzing trace with hash -174328440, now seen corresponding path program 1 times [2021-11-07 01:36:20,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:20,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885280022] [2021-11-07 01:36:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:20,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:20,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:20,497 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:20,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:36:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:22,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:36:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:22,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:22,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:22,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:22,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:22,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:22,738 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:36:22,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:36:23,558 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:36:23,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:36:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:36:23,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:36:24,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:24,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885280022] [2021-11-07 01:36:24,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885280022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:24,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:24,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:36:24,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160005333] [2021-11-07 01:36:24,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:36:24,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:36:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:36:24,240 INFO L87 Difference]: Start difference. First operand 2153 states and 3302 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:53,983 INFO L93 Difference]: Finished difference Result 5445 states and 8286 transitions. [2021-11-07 01:36:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:36:53,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-07 01:36:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:54,001 INFO L225 Difference]: With dead ends: 5445 [2021-11-07 01:36:54,002 INFO L226 Difference]: Without dead ends: 3302 [2021-11-07 01:36:54,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:36:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-11-07 01:36:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 2153. [2021-11-07 01:36:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 1.5181226765799256) internal successors, (3267), 2152 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3267 transitions. [2021-11-07 01:36:54,283 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3267 transitions. Word has length 184 [2021-11-07 01:36:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:54,283 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3267 transitions. [2021-11-07 01:36:54,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:36:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3267 transitions. [2021-11-07 01:36:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-07 01:36:54,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:54,316 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:54,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:54,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:54,538 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:36:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1652102553, now seen corresponding path program 1 times [2021-11-07 01:36:54,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:54,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765918372] [2021-11-07 01:36:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:54,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:54,540 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:54,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:36:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:36:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:56,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:36:56,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:56,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:56,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:56,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:56,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:36:57,048 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:36:57,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:36:57,568 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:36:57,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:36:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:36:57,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:36:58,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:58,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765918372] [2021-11-07 01:36:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1765918372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:36:58,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:36:58,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:36:58,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849698056] [2021-11-07 01:36:58,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:36:58,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:36:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:36:58,295 INFO L87 Difference]: Start difference. First operand 2153 states and 3267 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:34,031 INFO L93 Difference]: Finished difference Result 5661 states and 8549 transitions. [2021-11-07 01:37:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:37:34,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-07 01:37:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:34,055 INFO L225 Difference]: With dead ends: 5661 [2021-11-07 01:37:34,060 INFO L226 Difference]: Without dead ends: 3518 [2021-11-07 01:37:34,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2021-11-07 01:37:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 2378. [2021-11-07 01:37:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 1.4922170803533865) internal successors, (3547), 2377 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 3547 transitions. [2021-11-07 01:37:34,328 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 3547 transitions. Word has length 185 [2021-11-07 01:37:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:34,328 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 3547 transitions. [2021-11-07 01:37:34,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 3547 transitions. [2021-11-07 01:37:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 01:37:34,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:34,345 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:34,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:34,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:34,545 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1026052826, now seen corresponding path program 1 times [2021-11-07 01:37:34,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:34,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220169280] [2021-11-07 01:37:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:34,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:34,549 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:34,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:37:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:36,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:37:36,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:37,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:37:37,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:37:37,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:37:37,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:37:37,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:37:37,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:37:37,419 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:37:37,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:37:38,027 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:37:38,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:37:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:37:38,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:37:38,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:38,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220169280] [2021-11-07 01:37:38,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220169280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:38,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:38,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:37:38,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278832767] [2021-11-07 01:37:38,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:38,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:38,777 INFO L87 Difference]: Start difference. First operand 2378 states and 3547 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:09,201 INFO L93 Difference]: Finished difference Result 6003 states and 8956 transitions. [2021-11-07 01:38:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:38:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-07 01:38:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:09,211 INFO L225 Difference]: With dead ends: 6003 [2021-11-07 01:38:09,211 INFO L226 Difference]: Without dead ends: 3635 [2021-11-07 01:38:09,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:38:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-11-07 01:38:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 2396. [2021-11-07 01:38:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 1.4739039665970772) internal successors, (3530), 2395 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 3530 transitions. [2021-11-07 01:38:09,463 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 3530 transitions. Word has length 186 [2021-11-07 01:38:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:09,463 INFO L470 AbstractCegarLoop]: Abstraction has 2396 states and 3530 transitions. [2021-11-07 01:38:09,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 3530 transitions. [2021-11-07 01:38:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-07 01:38:09,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:09,469 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:09,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:09,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:09,686 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash 237091604, now seen corresponding path program 1 times [2021-11-07 01:38:09,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:09,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131313110] [2021-11-07 01:38:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:09,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:09,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:09,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:38:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:11,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:12,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:12,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:12,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:12,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:12,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:12,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:12,652 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:38:12,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:38:13,333 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:38:13,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:38:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:38:13,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:38:14,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:14,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131313110] [2021-11-07 01:38:14,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131313110] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:14,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:14,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:38:14,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358971900] [2021-11-07 01:38:14,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:14,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:38:14,037 INFO L87 Difference]: Start difference. First operand 2396 states and 3530 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:46,400 INFO L93 Difference]: Finished difference Result 5751 states and 8508 transitions. [2021-11-07 01:38:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:38:46,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-07 01:38:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:46,409 INFO L225 Difference]: With dead ends: 5751 [2021-11-07 01:38:46,409 INFO L226 Difference]: Without dead ends: 3365 [2021-11-07 01:38:46,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:38:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-11-07 01:38:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2288. [2021-11-07 01:38:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 1.4613030170529078) internal successors, (3342), 2287 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3342 transitions. [2021-11-07 01:38:46,621 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3342 transitions. Word has length 187 [2021-11-07 01:38:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:46,622 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 3342 transitions. [2021-11-07 01:38:46,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3342 transitions. [2021-11-07 01:38:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-07 01:38:46,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:46,627 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:46,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:46,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:46,851 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2008453910, now seen corresponding path program 1 times [2021-11-07 01:38:46,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:46,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115220087] [2021-11-07 01:38:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:46,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:46,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:46,853 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:46,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:38:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:48,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:49,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:38:49,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:49,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:49,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:49,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:49,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:38:49,560 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:38:49,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:38:50,519 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:38:50,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:38:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:38:50,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:38:51,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:51,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115220087] [2021-11-07 01:38:51,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115220087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:51,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:51,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:38:51,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110365009] [2021-11-07 01:38:51,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:51,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:38:51,283 INFO L87 Difference]: Start difference. First operand 2288 states and 3342 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:23,555 INFO L93 Difference]: Finished difference Result 5475 states and 8030 transitions. [2021-11-07 01:39:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:39:23,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-07 01:39:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:23,580 INFO L225 Difference]: With dead ends: 5475 [2021-11-07 01:39:23,590 INFO L226 Difference]: Without dead ends: 3451 [2021-11-07 01:39:23,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:39:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2021-11-07 01:39:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 2355. [2021-11-07 01:39:23,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 1.4443500424808835) internal successors, (3400), 2354 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3400 transitions. [2021-11-07 01:39:23,812 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3400 transitions. Word has length 187 [2021-11-07 01:39:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:23,813 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 3400 transitions. [2021-11-07 01:39:23,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3400 transitions. [2021-11-07 01:39:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:39:23,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:23,818 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:23,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:24,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:24,034 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:24,034 INFO L85 PathProgramCache]: Analyzing trace with hash 462252043, now seen corresponding path program 1 times [2021-11-07 01:39:24,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:24,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094948735] [2021-11-07 01:39:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:24,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:24,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:24,036 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:24,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:39:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:26,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:39:26,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:26,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:26,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:26,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:26,796 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:39:26,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:39:27,764 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:39:27,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:39:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:39:27,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:39:28,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:28,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094948735] [2021-11-07 01:39:28,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094948735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:28,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:28,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:39:28,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659173483] [2021-11-07 01:39:28,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:28,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:28,470 INFO L87 Difference]: Start difference. First operand 2355 states and 3400 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:56,714 INFO L93 Difference]: Finished difference Result 5688 states and 8258 transitions. [2021-11-07 01:39:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:39:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-07 01:39:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:56,722 INFO L225 Difference]: With dead ends: 5688 [2021-11-07 01:39:56,722 INFO L226 Difference]: Without dead ends: 3609 [2021-11-07 01:39:56,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:39:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-11-07 01:39:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2530. [2021-11-07 01:39:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 1.4294187425860023) internal successors, (3615), 2529 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3615 transitions. [2021-11-07 01:39:56,995 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3615 transitions. Word has length 188 [2021-11-07 01:39:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:56,995 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3615 transitions. [2021-11-07 01:39:56,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3615 transitions. [2021-11-07 01:39:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 01:39:57,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:57,000 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:57,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:57,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:57,214 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:57,214 INFO L85 PathProgramCache]: Analyzing trace with hash 993833957, now seen corresponding path program 1 times [2021-11-07 01:39:57,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:57,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310849489] [2021-11-07 01:39:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:57,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:57,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:57,216 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:57,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:39:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:59,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:39:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:39:59,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:59,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:59,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:59,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:59,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:39:59,959 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:39:59,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:40:00,888 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:40:00,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:40:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:40:01,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:40:01,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:01,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310849489] [2021-11-07 01:40:01,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310849489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:01,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:01,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:01,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161142987] [2021-11-07 01:40:01,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:01,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:01,576 INFO L87 Difference]: Start difference. First operand 2530 states and 3615 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:27,033 INFO L93 Difference]: Finished difference Result 5990 states and 8608 transitions. [2021-11-07 01:40:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:40:27,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-07 01:40:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:27,071 INFO L225 Difference]: With dead ends: 5990 [2021-11-07 01:40:27,071 INFO L226 Difference]: Without dead ends: 3763 [2021-11-07 01:40:27,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:40:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2021-11-07 01:40:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 2727. [2021-11-07 01:40:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.4115920763022745) internal successors, (3848), 2726 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3848 transitions. [2021-11-07 01:40:27,326 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3848 transitions. Word has length 189 [2021-11-07 01:40:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:27,326 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3848 transitions. [2021-11-07 01:40:27,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3848 transitions. [2021-11-07 01:40:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 01:40:27,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:27,331 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:27,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 01:40:27,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:27,555 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1722993591, now seen corresponding path program 1 times [2021-11-07 01:40:27,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:27,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700306708] [2021-11-07 01:40:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:27,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:27,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:27,557 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:27,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:40:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:29,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:40:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:40:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:30,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:30,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:40:30,457 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:40:30,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:40:31,570 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:40:31,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:40:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:40:31,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:40:32,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:32,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700306708] [2021-11-07 01:40:32,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700306708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:32,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:32,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:32,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178852813] [2021-11-07 01:40:32,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:32,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:32,322 INFO L87 Difference]: Start difference. First operand 2727 states and 3848 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:02,918 INFO L93 Difference]: Finished difference Result 6634 states and 9418 transitions. [2021-11-07 01:41:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:41:02,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-07 01:41:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:02,928 INFO L225 Difference]: With dead ends: 6634 [2021-11-07 01:41:02,928 INFO L226 Difference]: Without dead ends: 3928 [2021-11-07 01:41:02,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:41:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-11-07 01:41:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 2911. [2021-11-07 01:41:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 1.3958762886597937) internal successors, (4062), 2910 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 4062 transitions. [2021-11-07 01:41:03,212 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 4062 transitions. Word has length 192 [2021-11-07 01:41:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:03,212 INFO L470 AbstractCegarLoop]: Abstraction has 2911 states and 4062 transitions. [2021-11-07 01:41:03,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 4062 transitions. [2021-11-07 01:41:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-07 01:41:03,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:03,217 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:03,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:41:03,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:03,433 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:03,434 INFO L85 PathProgramCache]: Analyzing trace with hash -459825679, now seen corresponding path program 1 times [2021-11-07 01:41:03,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:03,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546946251] [2021-11-07 01:41:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:03,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:03,437 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:03,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:41:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:05,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:41:05,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:06,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:06,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:06,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:06,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:06,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:06,585 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:41:06,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:41:07,743 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:41:07,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:41:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:41:07,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:41:08,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:08,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546946251] [2021-11-07 01:41:08,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546946251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:08,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:08,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:08,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552893372] [2021-11-07 01:41:08,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:08,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:08,495 INFO L87 Difference]: Start difference. First operand 2911 states and 4062 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:42,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:42,546 INFO L93 Difference]: Finished difference Result 6764 states and 9530 transitions. [2021-11-07 01:41:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:41:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-07 01:41:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:42,552 INFO L225 Difference]: With dead ends: 6764 [2021-11-07 01:41:42,553 INFO L226 Difference]: Without dead ends: 3874 [2021-11-07 01:41:42,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:41:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3874 states. [2021-11-07 01:41:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3874 to 2919. [2021-11-07 01:41:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2919 states, 2918 states have (on average 1.3886223440712817) internal successors, (4052), 2918 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 4052 transitions. [2021-11-07 01:41:42,935 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 4052 transitions. Word has length 193 [2021-11-07 01:41:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:42,936 INFO L470 AbstractCegarLoop]: Abstraction has 2919 states and 4052 transitions. [2021-11-07 01:41:42,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 4052 transitions. [2021-11-07 01:41:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-07 01:41:42,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:42,972 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:43,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:43,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:43,182 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1522578341, now seen corresponding path program 1 times [2021-11-07 01:41:43,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:43,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065887188] [2021-11-07 01:41:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:43,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:43,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:43,185 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:43,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:41:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:45,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:41:45,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:46,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:46,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:46,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:46,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:46,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:41:46,552 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:41:46,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:41:48,101 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:41:48,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:41:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:41:48,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:41:48,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:48,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065887188] [2021-11-07 01:41:48,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065887188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:48,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:48,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:48,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696473432] [2021-11-07 01:41:48,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:48,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:48,992 INFO L87 Difference]: Start difference. First operand 2919 states and 4052 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:23,680 INFO L93 Difference]: Finished difference Result 6723 states and 9430 transitions. [2021-11-07 01:42:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:42:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-07 01:42:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:23,686 INFO L225 Difference]: With dead ends: 6723 [2021-11-07 01:42:23,687 INFO L226 Difference]: Without dead ends: 3825 [2021-11-07 01:42:23,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:42:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-11-07 01:42:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2936. [2021-11-07 01:42:23,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 1.38603066439523) internal successors, (4068), 2935 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 4068 transitions. [2021-11-07 01:42:23,912 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 4068 transitions. Word has length 193 [2021-11-07 01:42:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:23,913 INFO L470 AbstractCegarLoop]: Abstraction has 2936 states and 4068 transitions. [2021-11-07 01:42:23,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 4068 transitions. [2021-11-07 01:42:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-07 01:42:23,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:23,916 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:23,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:42:24,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:24,117 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash -424111708, now seen corresponding path program 1 times [2021-11-07 01:42:24,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:24,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237318133] [2021-11-07 01:42:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:24,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:24,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:24,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22af7c3e-36fe-4bea-ac8c-54db4bc26934/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:42:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:26,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:42:26,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:27,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 138 [2021-11-07 01:42:27,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 90 [2021-11-07 01:42:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:27,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:27,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:27,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:27,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:42:27,104 INFO L190 IndexEqualityManager]: detected not equals via solver