./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e872a0dffbf376eb2d8b1e3516401a8dafe115a6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e872a0dffbf376eb2d8b1e3516401a8dafe115a6 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:47:49,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:47:49,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:47:49,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:47:49,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:47:49,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:47:49,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:47:49,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:47:49,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:47:49,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:47:49,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:47:49,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:47:49,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:47:49,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:47:49,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:47:49,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:47:49,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:47:49,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:47:49,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:47:49,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:47:49,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:47:49,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:47:49,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:47:49,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:47:49,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:47:49,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:47:49,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:47:49,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:47:49,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:47:49,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:47:49,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:47:49,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:47:49,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:47:49,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:47:49,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:47:49,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:47:49,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:47:49,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:47:49,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:47:49,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:47:49,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:47:49,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 02:47:49,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:47:49,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:47:49,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:47:49,615 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:47:49,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:47:49,616 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:47:49,616 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:47:49,617 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:47:49,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:47:49,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:47:49,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:47:49,618 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:47:49,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:47:49,619 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:47:49,619 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:47:49,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:47:49,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:47:49,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:47:49,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:47:49,624 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:47:49,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:47:49,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:47:49,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:47:49,625 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:47:49,627 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:47:49,627 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:47:49,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:47:49,629 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:47:49,629 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:47:49,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:47:49,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:47:49,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:47:49,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:47:49,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:47:49,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:47:49,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:47:49,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:47:49,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:47:49,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:47:49,633 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_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2021-10-16 02:47:49,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:47:49,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:47:49,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:47:49,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:47:49,940 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:47:49,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-16 02:47:50,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data/bb8b1fc45/c7308078b42f4cd08a00e5a540eacdb4/FLAG66fe5bbd8 [2021-10-16 02:47:50,430 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:47:50,430 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-16 02:47:50,436 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data/bb8b1fc45/c7308078b42f4cd08a00e5a540eacdb4/FLAG66fe5bbd8 [2021-10-16 02:47:50,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data/bb8b1fc45/c7308078b42f4cd08a00e5a540eacdb4 [2021-10-16 02:47:50,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:47:50,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:47:50,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:47:50,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:47:50,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:47:50,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:47:50" (1/1) ... [2021-10-16 02:47:50,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a3b5e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:50, skipping insertion in model container [2021-10-16 02:47:50,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:47:50" (1/1) ... [2021-10-16 02:47:50,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:47:50,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:47:51,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:47:51,043 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:47:51,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:47:51,074 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:47:51,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51 WrapperNode [2021-10-16 02:47:51,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:47:51,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:47:51,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:47:51,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:47:51,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:47:51,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:47:51,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:47:51,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:47:51,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:47:51,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:47:51,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:47:51,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:47:51,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (1/1) ... [2021-10-16 02:47:51,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:47:51,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:47:51,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:47:51,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:47:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:47:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:47:51,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:47:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:47:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:47:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:47:51,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:47:51,599 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 02:47:51,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:47:51 BoogieIcfgContainer [2021-10-16 02:47:51,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:47:51,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:47:51,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:47:51,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:47:51,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:47:50" (1/3) ... [2021-10-16 02:47:51,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6294e831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:47:51, skipping insertion in model container [2021-10-16 02:47:51,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:51" (2/3) ... [2021-10-16 02:47:51,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6294e831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:47:51, skipping insertion in model container [2021-10-16 02:47:51,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:47:51" (3/3) ... [2021-10-16 02:47:51,611 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2021-10-16 02:47:51,617 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:47:51,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-10-16 02:47:51,655 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:47:51,662 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:47:51,662 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-16 02:47:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:47:51,684 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:47:51,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:47:51,685 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:47:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:47:51,699 INFO L82 PathProgramCache]: Analyzing trace with hash 86812, now seen corresponding path program 1 times [2021-10-16 02:47:51,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:47:51,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837032874] [2021-10-16 02:47:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:51,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:47:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:51,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:47:51,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837032874] [2021-10-16 02:47:51,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837032874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:47:51,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:47:51,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 02:47:51,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692011019] [2021-10-16 02:47:51,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:47:51,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:47:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:47:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:47:51,871 INFO L87 Difference]: Start difference. First operand has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:47:51,908 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-16 02:47:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:47:51,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:47:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:47:51,917 INFO L225 Difference]: With dead ends: 17 [2021-10-16 02:47:51,918 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 02:47:51,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:47:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 02:47:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 02:47:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 2.125) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-16 02:47:51,948 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2021-10-16 02:47:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:47:51,948 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-16 02:47:51,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-16 02:47:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:47:51,949 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:47:51,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:47:51,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:47:51,950 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:47:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:47:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash 86813, now seen corresponding path program 1 times [2021-10-16 02:47:51,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:47:51,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14384960] [2021-10-16 02:47:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:51,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:47:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:52,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:47:52,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14384960] [2021-10-16 02:47:52,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14384960] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:47:52,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:47:52,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 02:47:52,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418299924] [2021-10-16 02:47:52,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:47:52,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:47:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:47:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:47:52,015 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:47:52,040 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-16 02:47:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:47:52,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:47:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:47:52,042 INFO L225 Difference]: With dead ends: 18 [2021-10-16 02:47:52,042 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 02:47:52,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:47:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 02:47:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-16 02:47:52,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.9) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-16 02:47:52,047 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 3 [2021-10-16 02:47:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:47:52,047 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-16 02:47:52,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,048 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-16 02:47:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:47:52,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:47:52,049 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-16 02:47:52,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:47:52,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:47:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:47:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash 83467978, now seen corresponding path program 1 times [2021-10-16 02:47:52,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:47:52,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140885399] [2021-10-16 02:47:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:52,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:47:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:52,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:47:52,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140885399] [2021-10-16 02:47:52,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140885399] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:47:52,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:47:52,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:47:52,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833531218] [2021-10-16 02:47:52,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:47:52,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:47:52,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:47:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:47:52,164 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:47:52,238 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-16 02:47:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:47:52,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-16 02:47:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:47:52,242 INFO L225 Difference]: With dead ends: 17 [2021-10-16 02:47:52,242 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 02:47:52,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:47:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 02:47:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-10-16 02:47:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-16 02:47:52,247 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 5 [2021-10-16 02:47:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:47:52,258 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-16 02:47:52,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-16 02:47:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:47:52,259 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:47:52,259 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:47:52,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:47:52,260 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:47:52,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:47:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1707408379, now seen corresponding path program 1 times [2021-10-16 02:47:52,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:47:52,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047580055] [2021-10-16 02:47:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:52,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:47:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:52,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:47:52,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047580055] [2021-10-16 02:47:52,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047580055] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:47:52,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331100833] [2021-10-16 02:47:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:52,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:47:52,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:47:52,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:47:52,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:47:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:52,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:47:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:47:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:47:52,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:47:52,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331100833] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:47:52,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:47:52,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2021-10-16 02:47:52,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458283786] [2021-10-16 02:47:52,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:47:52,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:47:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:47:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:47:52,497 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:47:52,525 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-10-16 02:47:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:47:52,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:47:52,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:47:52,528 INFO L225 Difference]: With dead ends: 24 [2021-10-16 02:47:52,529 INFO L226 Difference]: Without dead ends: 24 [2021-10-16 02:47:52,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:47:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-16 02:47:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-10-16 02:47:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-10-16 02:47:52,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 6 [2021-10-16 02:47:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:47:52,535 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-10-16 02:47:52,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-10-16 02:47:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:47:52,536 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:47:52,536 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:47:52,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:47:52,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:47:52,758 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:47:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:47:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1707409478, now seen corresponding path program 1 times [2021-10-16 02:47:52,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:47:52,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723346796] [2021-10-16 02:47:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:52,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:47:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:52,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:47:52,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723346796] [2021-10-16 02:47:52,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723346796] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:47:52,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265534968] [2021-10-16 02:47:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:52,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:47:52,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:47:52,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:47:52,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:47:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:47:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:47:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:52,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:52,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265534968] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:47:52,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601669162] [2021-10-16 02:47:52,969 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-16 02:47:52,969 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:47:52,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:47:52,980 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:47:52,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:47:53,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:47:53,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:47:53,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:47:53,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-10-16 02:47:53,045 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:47:53,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:47:53,051 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-16 02:47:53,052 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:47:53,053 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:47:53,054 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-16 02:47:53,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-10-16 02:47:53,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:47:53,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:47:53,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-16 02:47:53,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:47:53,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-16 02:47:53,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:47:53,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:47:53,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:47:53,144 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:47:53,147 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-16 02:47:53,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:47:53,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-10-16 02:47:53,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:47:53,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:47:53,356 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_50| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:47:53,359 INFO L168 Benchmark]: Toolchain (without parser) took 2522.86 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 90.1 MB in the beginning and 134.1 MB in the end (delta: -44.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:53,360 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 130.0 MB. Free memory was 106.9 MB in the beginning and 106.9 MB in the end (delta: 17.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:47:53,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.24 ms. Allocated memory is still 130.0 MB. Free memory was 89.9 MB in the beginning and 103.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:53,361 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.89 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 102.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:53,361 INFO L168 Benchmark]: Boogie Preprocessor took 23.31 ms. Allocated memory is still 130.0 MB. Free memory was 102.1 MB in the beginning and 101.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:47:53,361 INFO L168 Benchmark]: RCFGBuilder took 470.65 ms. Allocated memory is still 130.0 MB. Free memory was 101.1 MB in the beginning and 87.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:53,362 INFO L168 Benchmark]: TraceAbstraction took 1753.60 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 87.5 MB in the beginning and 134.1 MB in the end (delta: -46.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:47:53,365 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 130.0 MB. Free memory was 106.9 MB in the beginning and 106.9 MB in the end (delta: 17.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 233.24 ms. Allocated memory is still 130.0 MB. Free memory was 89.9 MB in the beginning and 103.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.89 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 102.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.31 ms. Allocated memory is still 130.0 MB. Free memory was 102.1 MB in the beginning and 101.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 470.65 ms. Allocated memory is still 130.0 MB. Free memory was 101.1 MB in the beginning and 87.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1753.60 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 87.5 MB in the beginning and 134.1 MB in the end (delta: -46.7 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_50| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_50|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:47:53,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:47:55,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:47:55,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:47:55,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:47:55,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:47:55,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:47:55,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:47:55,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:47:55,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:47:55,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:47:55,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:47:55,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:47:55,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:47:55,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:47:55,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:47:55,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:47:55,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:47:55,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:47:55,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:47:55,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:47:55,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:47:55,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:47:55,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:47:55,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:47:55,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:47:55,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:47:55,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:47:55,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:47:55,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:47:55,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:47:55,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:47:55,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:47:55,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:47:55,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:47:55,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:47:55,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:47:55,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:47:55,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:47:55,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:47:55,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:47:55,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:47:55,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 02:47:55,828 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:47:55,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:47:55,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:47:55,830 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:47:55,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:47:55,830 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:47:55,830 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:47:55,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:47:55,831 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:47:55,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:47:55,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:47:55,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:47:55,834 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:47:55,834 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:47:55,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:47:55,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:47:55,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:47:55,835 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:47:55,835 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:47:55,835 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:47:55,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:47:55,836 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:47:55,836 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:47:55,836 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:47:55,836 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:47:55,837 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:47:55,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:47:55,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:47:55,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:47:55,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:47:55,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:47:55,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:47:55,838 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:47:55,839 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:47:55,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:47:55,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:47:55,839 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_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e872a0dffbf376eb2d8b1e3516401a8dafe115a6 [2021-10-16 02:47:56,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:47:56,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:47:56,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:47:56,312 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:47:56,313 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:47:56,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-16 02:47:56,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data/6482c9594/3f842e217c654335a265e9dae193b4bd/FLAG59704e043 [2021-10-16 02:47:56,954 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:47:56,954 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-16 02:47:56,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data/6482c9594/3f842e217c654335a265e9dae193b4bd/FLAG59704e043 [2021-10-16 02:47:57,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/data/6482c9594/3f842e217c654335a265e9dae193b4bd [2021-10-16 02:47:57,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:47:57,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:47:57,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:47:57,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:47:57,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:47:57,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473ce6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57, skipping insertion in model container [2021-10-16 02:47:57,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:47:57,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:47:57,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:47:57,580 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:47:57,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:47:57,623 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:47:57,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57 WrapperNode [2021-10-16 02:47:57,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:47:57,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:47:57,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:47:57,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:47:57,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:47:57,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:47:57,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:47:57,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:47:57,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:47:57,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:47:57,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:47:57,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:47:57,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (1/1) ... [2021-10-16 02:47:57,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:47:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:47:57,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:47:57,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:47:57,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:47:57,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:47:57,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:47:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:47:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:47:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:47:58,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:47:58,176 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 02:47:58,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:47:58 BoogieIcfgContainer [2021-10-16 02:47:58,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:47:58,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:47:58,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:47:58,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:47:58,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:47:57" (1/3) ... [2021-10-16 02:47:58,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780b88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:47:58, skipping insertion in model container [2021-10-16 02:47:58,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:47:57" (2/3) ... [2021-10-16 02:47:58,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780b88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:47:58, skipping insertion in model container [2021-10-16 02:47:58,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:47:58" (3/3) ... [2021-10-16 02:47:58,185 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2021-10-16 02:47:58,190 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:47:58,190 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-10-16 02:47:58,232 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:47:58,238 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:47:58,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-16 02:47:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:47:58,257 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:47:58,257 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:47:58,258 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:47:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:47:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-16 02:47:58,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:47:58,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188532872] [2021-10-16 02:47:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:58,276 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:47:58,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:47:58,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:47:58,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:47:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:47:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:47:58,421 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:47:58,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:47:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:58,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:47:58,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188532872] [2021-10-16 02:47:58,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188532872] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:47:58,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:47:58,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-10-16 02:47:58,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131613803] [2021-10-16 02:47:58,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:47:58,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:47:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:47:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:47:58,555 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 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, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:47:58,626 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-16 02:47:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:47:58,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 4 [2021-10-16 02:47:58,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:47:58,635 INFO L225 Difference]: With dead ends: 27 [2021-10-16 02:47:58,635 INFO L226 Difference]: Without dead ends: 25 [2021-10-16 02:47:58,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:47:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-16 02:47:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-16 02:47:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-16 02:47:58,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 4 [2021-10-16 02:47:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:47:58,665 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-16 02:47:58,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-16 02:47:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:47:58,666 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:47:58,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:47:58,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:47:58,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:47:58,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:47:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:47:58,880 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-10-16 02:47:58,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:47:58,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460544268] [2021-10-16 02:47:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:58,881 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:47:58,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:47:58,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:47:58,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:47:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:58,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:47:58,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:47:58,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:47:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:59,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:59,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:47:59,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460544268] [2021-10-16 02:47:59,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460544268] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:47:59,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:47:59,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-10-16 02:47:59,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387159507] [2021-10-16 02:47:59,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:47:59,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:47:59,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:47:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:47:59,284 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:47:59,556 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-10-16 02:47:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:47:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 4 [2021-10-16 02:47:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:47:59,558 INFO L225 Difference]: With dead ends: 49 [2021-10-16 02:47:59,558 INFO L226 Difference]: Without dead ends: 49 [2021-10-16 02:47:59,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:47:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-16 02:47:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-10-16 02:47:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-16 02:47:59,565 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2021-10-16 02:47:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:47:59,565 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-16 02:47:59,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:47:59,566 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-16 02:47:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:47:59,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:47:59,566 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:47:59,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:47:59,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:47:59,767 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:47:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:47:59,768 INFO L82 PathProgramCache]: Analyzing trace with hash 741359650, now seen corresponding path program 1 times [2021-10-16 02:47:59,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:47:59,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977635656] [2021-10-16 02:47:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:59,769 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:47:59,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:47:59,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:47:59,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:47:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:47:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:47:59,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:47:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:59,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:47:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:47:59,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:47:59,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977635656] [2021-10-16 02:47:59,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977635656] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:47:59,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151470556] [2021-10-16 02:47:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:47:59,976 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:47:59,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:47:59,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:47:59,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:48:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:48:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:00,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:00,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [151470556] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:00,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428721098] [2021-10-16 02:48:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:00,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:00,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:00,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:00,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:48:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:48:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:00,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:00,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428721098] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:00,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:48:00,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-16 02:48:00,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959681902] [2021-10-16 02:48:00,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:48:00,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:00,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:48:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:48:00,367 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:00,435 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-10-16 02:48:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:48:00,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:48:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:00,437 INFO L225 Difference]: With dead ends: 36 [2021-10-16 02:48:00,437 INFO L226 Difference]: Without dead ends: 36 [2021-10-16 02:48:00,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:48:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-16 02:48:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-10-16 02:48:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-10-16 02:48:00,442 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 10 [2021-10-16 02:48:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:00,442 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-10-16 02:48:00,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-10-16 02:48:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:48:00,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:00,443 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2021-10-16 02:48:00,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-16 02:48:00,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:00,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:01,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:48:01,045 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:48:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:01,045 INFO L82 PathProgramCache]: Analyzing trace with hash 742961990, now seen corresponding path program 1 times [2021-10-16 02:48:01,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:01,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401369509] [2021-10-16 02:48:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:01,046 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:01,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:01,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:01,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:48:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:01,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:01,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:01,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:01,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:01,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401369509] [2021-10-16 02:48:01,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401369509] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:01,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261622587] [2021-10-16 02:48:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:01,978 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:01,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:01,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:02,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 02:48:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:02,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:02,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:02,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261622587] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:02,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941688097] [2021-10-16 02:48:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:02,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:02,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:02,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:02,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:48:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:02,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:02,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:02,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:02,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:03,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941688097] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:03,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:48:03,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-10-16 02:48:03,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440817978] [2021-10-16 02:48:03,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:48:03,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:03,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:48:03,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:48:03,003 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:03,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:03,625 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2021-10-16 02:48:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:48:03,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:48:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:03,627 INFO L225 Difference]: With dead ends: 80 [2021-10-16 02:48:03,627 INFO L226 Difference]: Without dead ends: 80 [2021-10-16 02:48:03,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:48:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-16 02:48:03,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 42. [2021-10-16 02:48:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-16 02:48:03,633 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 10 [2021-10-16 02:48:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:03,634 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-16 02:48:03,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-16 02:48:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:48:03,635 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:03,635 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:03,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:03,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-16 02:48:04,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:04,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:04,236 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:48:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139286, now seen corresponding path program 2 times [2021-10-16 02:48:04,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:04,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56187749] [2021-10-16 02:48:04,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:48:04,237 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:04,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:04,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:04,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:48:04,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:48:04,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:48:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:48:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:04,362 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:48:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:48:04,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:04,848 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:48:04,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-10-16 02:48:04,872 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:48:04,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 46 [2021-10-16 02:48:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:05,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:08,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:08,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56187749] [2021-10-16 02:48:08,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56187749] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:48:08,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:48:08,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-16 02:48:08,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945129130] [2021-10-16 02:48:08,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:48:08,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:48:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:48:08,495 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:15,519 WARN L207 SmtUtils]: Spent 6.30 s on a formula simplification that was a NOOP. DAG size: 40 [2021-10-16 02:48:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:21,779 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-10-16 02:48:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:48:21,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 19 [2021-10-16 02:48:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:21,785 INFO L225 Difference]: With dead ends: 61 [2021-10-16 02:48:21,786 INFO L226 Difference]: Without dead ends: 61 [2021-10-16 02:48:21,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 10277.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:48:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-16 02:48:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-10-16 02:48:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-10-16 02:48:21,791 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 19 [2021-10-16 02:48:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:21,791 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-10-16 02:48:21,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-10-16 02:48:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:48:21,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:21,792 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:21,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:22,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:48:22,003 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:48:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:22,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139287, now seen corresponding path program 1 times [2021-10-16 02:48:22,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:22,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909784824] [2021-10-16 02:48:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:22,005 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:22,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:22,006 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:22,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:48:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:22,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:22,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:22,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:22,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909784824] [2021-10-16 02:48:22,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909784824] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:22,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [48296900] [2021-10-16 02:48:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:22,471 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:22,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:22,488 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:22,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-16 02:48:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:22,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:22,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:22,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:22,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [48296900] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:22,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171055762] [2021-10-16 02:48:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:22,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:22,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:22,888 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:22,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 02:48:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:23,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:23,099 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:48:23,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:48:23,570 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-16 02:48:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 54 [2021-10-16 02:48:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:24,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:24,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171055762] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:48:24,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:48:24,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7, 7, 7] total 18 [2021-10-16 02:48:24,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279789968] [2021-10-16 02:48:24,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:48:24,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:48:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:48:24,733 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:25,010 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-16 02:48:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:48:25,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 19 [2021-10-16 02:48:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:25,013 INFO L225 Difference]: With dead ends: 48 [2021-10-16 02:48:25,013 INFO L226 Difference]: Without dead ends: 48 [2021-10-16 02:48:25,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 817.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:48:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-16 02:48:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-16 02:48:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-10-16 02:48:25,019 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 19 [2021-10-16 02:48:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:25,019 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-10-16 02:48:25,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-10-16 02:48:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:48:25,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:25,020 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:25,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:25,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:25,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-16 02:48:25,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:48:25,624 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:48:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1578808454, now seen corresponding path program 1 times [2021-10-16 02:48:25,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:25,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722650352] [2021-10-16 02:48:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:25,625 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:25,627 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:25,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:48:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:25,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:25,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:25,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:26,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:26,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722650352] [2021-10-16 02:48:26,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722650352] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:26,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1362599725] [2021-10-16 02:48:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:26,132 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:26,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:26,132 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:26,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 02:48:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:26,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:26,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:26,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1362599725] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:26,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760247269] [2021-10-16 02:48:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:26,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:26,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:26,568 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:26,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 02:48:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:26,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:48:26,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:26,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:26,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760247269] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:48:26,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:48:26,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7, 7, 7, 7] total 13 [2021-10-16 02:48:26,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278915164] [2021-10-16 02:48:26,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:48:26,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:48:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:48:26,910 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:26,955 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-10-16 02:48:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:48:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 20 [2021-10-16 02:48:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:26,962 INFO L225 Difference]: With dead ends: 47 [2021-10-16 02:48:26,962 INFO L226 Difference]: Without dead ends: 47 [2021-10-16 02:48:26,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:48:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-16 02:48:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-16 02:48:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-10-16 02:48:26,974 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 20 [2021-10-16 02:48:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:26,975 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-10-16 02:48:26,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-10-16 02:48:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:48:26,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:26,976 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:26,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:27,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:27,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:27,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:27,577 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:48:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1578808453, now seen corresponding path program 1 times [2021-10-16 02:48:27,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:27,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846081276] [2021-10-16 02:48:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:27,578 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:27,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:27,580 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:27,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:48:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:27,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:28,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:28,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846081276] [2021-10-16 02:48:28,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846081276] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:28,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727403375] [2021-10-16 02:48:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:28,129 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:28,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:28,131 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:28,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-16 02:48:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:48:28,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:28,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:28,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727403375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:28,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054433207] [2021-10-16 02:48:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:28,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:28,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:28,624 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:28,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-16 02:48:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:28,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:48:28,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:28,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:29,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:29,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054433207] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:48:29,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:48:29,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7, 7, 7, 7] total 14 [2021-10-16 02:48:29,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402724815] [2021-10-16 02:48:29,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:48:29,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:48:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:48:29,362 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:29,562 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-10-16 02:48:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:48:29,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 20 [2021-10-16 02:48:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:29,563 INFO L225 Difference]: With dead ends: 49 [2021-10-16 02:48:29,563 INFO L226 Difference]: Without dead ends: 49 [2021-10-16 02:48:29,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:48:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-16 02:48:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-16 02:48:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-10-16 02:48:29,569 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 20 [2021-10-16 02:48:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:29,569 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-10-16 02:48:29,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-10-16 02:48:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:48:29,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:29,571 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1] [2021-10-16 02:48:29,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:29,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:29,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-16 02:48:30,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:30,176 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:48:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:30,176 INFO L82 PathProgramCache]: Analyzing trace with hash -620816058, now seen corresponding path program 2 times [2021-10-16 02:48:30,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:30,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436896565] [2021-10-16 02:48:30,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:48:30,177 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:30,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:30,178 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:30,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 02:48:30,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:48:30,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:48:30,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:48:30,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:30,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:30,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:33,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:33,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436896565] [2021-10-16 02:48:33,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436896565] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:33,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1003060927] [2021-10-16 02:48:33,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:48:33,389 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:33,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:33,389 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:33,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-10-16 02:48:33,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:48:33,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:48:33,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:48:33,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:33,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:34,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:36,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1003060927] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:36,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602377017] [2021-10-16 02:48:36,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:48:36,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:36,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:36,728 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:36,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-16 02:48:37,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:48:37,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:48:37,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:48:37,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:37,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:48:40,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602377017] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:40,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:48:40,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 8, 8, 9] total 29 [2021-10-16 02:48:40,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179045640] [2021-10-16 02:48:40,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-16 02:48:40,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:40,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-16 02:48:40,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-10-16 02:48:40,415 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:50,447 INFO L93 Difference]: Finished difference Result 247 states and 263 transitions. [2021-10-16 02:48:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 02:48:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 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 22 [2021-10-16 02:48:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:50,458 INFO L225 Difference]: With dead ends: 247 [2021-10-16 02:48:50,458 INFO L226 Difference]: Without dead ends: 247 [2021-10-16 02:48:50,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 13018.9ms TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2021-10-16 02:48:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-16 02:48:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 72. [2021-10-16 02:48:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-10-16 02:48:50,464 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 22 [2021-10-16 02:48:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:50,465 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-10-16 02:48:50,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-10-16 02:48:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-16 02:48:50,467 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:50,467 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:48:50,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:50,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:50,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-10-16 02:48:51,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:51,072 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:48:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash 983139060, now seen corresponding path program 1 times [2021-10-16 02:48:51,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:51,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288565035] [2021-10-16 02:48:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:51,073 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:51,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:51,074 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:51,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-16 02:48:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:48:51,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:48:51,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:48:52,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:52,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288565035] [2021-10-16 02:48:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288565035] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:52,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1408312557] [2021-10-16 02:48:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:52,097 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:52,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:52,107 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:52,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-16 02:48:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:52,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:48:52,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:48:52,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:48:52,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1408312557] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:52,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093483852] [2021-10-16 02:48:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:48:52,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:48:52,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:48:52,942 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:48:52,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-16 02:48:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:48:53,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:48:53,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-16 02:48:53,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-16 02:48:53,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093483852] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:53,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:48:53,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 4, 4] total 22 [2021-10-16 02:48:53,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828228963] [2021-10-16 02:48:53,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-16 02:48:53,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:48:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-16 02:48:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:48:53,793 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:48:54,644 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-10-16 02:48:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 02:48:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 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 35 [2021-10-16 02:48:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:48:54,646 INFO L225 Difference]: With dead ends: 82 [2021-10-16 02:48:54,647 INFO L226 Difference]: Without dead ends: 82 [2021-10-16 02:48:54,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 699.0ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:48:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-16 02:48:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-10-16 02:48:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-10-16 02:48:54,653 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 35 [2021-10-16 02:48:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:48:54,653 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-10-16 02:48:54,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:48:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-10-16 02:48:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-16 02:48:54,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:48:54,656 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1] [2021-10-16 02:48:54,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:54,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:55,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:48:55,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:48:55,259 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:48:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:48:55,260 INFO L82 PathProgramCache]: Analyzing trace with hash 145810758, now seen corresponding path program 3 times [2021-10-16 02:48:55,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:48:55,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791707376] [2021-10-16 02:48:55,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:48:55,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:48:55,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:48:55,262 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:48:55,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-16 02:48:55,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-16 02:48:55,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:48:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:48:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:56,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:48:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-16 02:48:56,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:48:56,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791707376] [2021-10-16 02:48:56,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791707376] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:48:56,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1036501315] [2021-10-16 02:48:56,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:48:56,963 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:48:56,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:48:56,973 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:48:56,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-16 02:48:57,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-16 02:48:57,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:48:57,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-16 02:48:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:48:57,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:48:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 128 proven. 155 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-16 02:48:59,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:21,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1036501315] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:49:21,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677001389] [2021-10-16 02:49:21,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:49:21,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:49:21,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:49:21,316 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:49:21,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-16 02:49:24,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-16 02:49:24,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:49:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:49:24,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:24,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:49:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 76 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:49:24,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:49:43,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677001389] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:49:43,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:49:43,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 25, 15, 17] total 78 [2021-10-16 02:49:43,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27865368] [2021-10-16 02:49:43,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-10-16 02:49:43,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:49:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-10-16 02:49:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1042, Invalid=4964, Unknown=0, NotChecked=0, Total=6006 [2021-10-16 02:49:43,576 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 78 states, 78 states have (on average 2.5641025641025643) internal successors, (200), 78 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:49:44,920 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-10-16 02:49:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:49:44,921 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.5641025641025643) internal successors, (200), 78 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-16 02:49:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:49:44,922 INFO L225 Difference]: With dead ends: 66 [2021-10-16 02:49:44,922 INFO L226 Difference]: Without dead ends: 66 [2021-10-16 02:49:44,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 32281.0ms TimeCoverageRelationStatistics Valid=1042, Invalid=4964, Unknown=0, NotChecked=0, Total=6006 [2021-10-16 02:49:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-16 02:49:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-16 02:49:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-10-16 02:49:44,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 46 [2021-10-16 02:49:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:49:44,929 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-10-16 02:49:44,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.5641025641025643) internal successors, (200), 78 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:49:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-10-16 02:49:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-16 02:49:44,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:49:44,931 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:49:44,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-16 02:49:45,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-16 02:49:45,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-16 02:49:45,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:49:45,540 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:49:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:49:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash -676132566, now seen corresponding path program 1 times [2021-10-16 02:49:45,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:49:45,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760063267] [2021-10-16 02:49:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:45,541 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:49:45,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:49:45,547 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:49:45,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-16 02:49:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:49:46,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:46,160 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:49:46,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:49:46,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:49:47,149 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:49:47,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-10-16 02:49:47,185 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:49:47,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 45 [2021-10-16 02:49:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:49:47,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:49:52,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:49:52,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760063267] [2021-10-16 02:49:52,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760063267] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:49:52,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823405490] [2021-10-16 02:49:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:52,923 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:49:52,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:49:52,928 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:49:52,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-16 02:49:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:49:53,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:49:53,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:49:54,004 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:49:54,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:49:54,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:49:54,951 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:49:54,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-10-16 02:49:54,986 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:49:54,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 44 [2021-10-16 02:49:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:49:55,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:49:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:49:59,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [823405490] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:49:59,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715040512] [2021-10-16 02:49:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:49:59,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:49:59,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:49:59,892 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:49:59,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-16 02:50:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:50:00,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:00,795 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:50:00,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:50:00,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:50:01,813 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:50:01,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-10-16 02:50:01,875 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:50:01,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 45 [2021-10-16 02:50:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:02,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:04,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715040512] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:04,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:04,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-10-16 02:50:04,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661325902] [2021-10-16 02:50:04,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:50:04,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:50:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:50:04,910 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:20,642 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-10-16 02:50:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:50:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-16 02:50:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:20,645 INFO L225 Difference]: With dead ends: 90 [2021-10-16 02:50:20,645 INFO L226 Difference]: Without dead ends: 90 [2021-10-16 02:50:20,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 17701.1ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:50:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-16 02:50:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2021-10-16 02:50:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-10-16 02:50:20,650 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 47 [2021-10-16 02:50:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:20,650 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-10-16 02:50:20,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-10-16 02:50:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-16 02:50:20,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:20,652 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:20,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:20,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:21,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:21,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:21,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:50:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:21,272 INFO L82 PathProgramCache]: Analyzing trace with hash 514726907, now seen corresponding path program 1 times [2021-10-16 02:50:21,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:21,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714119355] [2021-10-16 02:50:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:21,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:21,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:21,274 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:21,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-16 02:50:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:50:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:50:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:22,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:23,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:23,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714119355] [2021-10-16 02:50:23,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714119355] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:23,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [554223137] [2021-10-16 02:50:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:23,382 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:23,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:23,383 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:23,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-16 02:50:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:50:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:24,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:50:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:24,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:25,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [554223137] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:25,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860699925] [2021-10-16 02:50:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:25,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:25,389 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:25,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-16 02:50:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:26,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:50:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:26,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:50:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:26,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:27,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860699925] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:27,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:27,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-16 02:50:27,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933553828] [2021-10-16 02:50:27,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:50:27,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:27,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:50:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:50:27,200 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:28,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:28,362 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-10-16 02:50:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:50:28,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 48 [2021-10-16 02:50:28,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:28,364 INFO L225 Difference]: With dead ends: 80 [2021-10-16 02:50:28,364 INFO L226 Difference]: Without dead ends: 80 [2021-10-16 02:50:28,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1109.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:50:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-16 02:50:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-10-16 02:50:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.095890410958904) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-10-16 02:50:28,369 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 48 [2021-10-16 02:50:28,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:28,369 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-10-16 02:50:28,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:28,370 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-10-16 02:50:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-16 02:50:28,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:28,371 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:28,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:28,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:28,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:28,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:28,986 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:50:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash -46063240, now seen corresponding path program 2 times [2021-10-16 02:50:28,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:28,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105620462] [2021-10-16 02:50:28,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:28,987 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:28,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:28,988 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:28,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-16 02:50:29,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:29,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:50:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:30,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:30,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:30,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105620462] [2021-10-16 02:50:30,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105620462] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:30,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [489746661] [2021-10-16 02:50:30,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:30,561 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:30,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:30,562 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:30,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-10-16 02:50:31,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:31,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:31,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:50:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:32,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:32,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [489746661] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:32,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119735625] [2021-10-16 02:50:32,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:32,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:32,279 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:32,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-16 02:50:33,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:33,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:50:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:33,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:50:33,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-16 02:50:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:33,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:34,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119735625] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:34,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:50:34,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 9] total 20 [2021-10-16 02:50:34,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691853576] [2021-10-16 02:50:34,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:50:34,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:50:34,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:50:34,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:50:34,605 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:35,643 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-10-16 02:50:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 02:50:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 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 59 [2021-10-16 02:50:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:35,645 INFO L225 Difference]: With dead ends: 102 [2021-10-16 02:50:35,645 INFO L226 Difference]: Without dead ends: 102 [2021-10-16 02:50:35,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1065.6ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-10-16 02:50:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-16 02:50:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-10-16 02:50:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.120879120879121) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-10-16 02:50:35,650 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 59 [2021-10-16 02:50:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:35,650 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-10-16 02:50:35,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:50:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-10-16 02:50:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-16 02:50:35,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:35,652 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:35,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:35,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:36,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:36,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:50:36,258 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:50:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:36,258 INFO L82 PathProgramCache]: Analyzing trace with hash -401630678, now seen corresponding path program 2 times [2021-10-16 02:50:36,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:50:36,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453554556] [2021-10-16 02:50:36,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:36,259 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:50:36,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:50:36,260 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:50:36,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-10-16 02:50:37,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:37,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:50:37,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:37,402 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:50:37,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:50:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:50:38,401 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:50:38,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-10-16 02:50:38,439 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:50:38,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 48 [2021-10-16 02:50:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:39,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:51,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:50:51,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453554556] [2021-10-16 02:50:51,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453554556] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:50:51,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [140675271] [2021-10-16 02:50:51,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:50:51,636 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:50:51,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:50:51,637 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:50:51,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-10-16 02:50:53,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:50:53,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:50:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:50:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:53,366 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:50:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:50:53,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:50:54,260 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:50:54,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-10-16 02:50:54,297 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:50:54,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 46 [2021-10-16 02:50:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:50:55,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:51:00,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [140675271] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:51:00,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282692571] [2021-10-16 02:51:00,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:51:00,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:51:00,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:51:00,817 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:51:00,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-16 02:51:02,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:51:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:51:02,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:51:02,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:51:02,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:51:02,340 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:51:02,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:51:03,229 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:51:03,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2021-10-16 02:51:03,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 02:51:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:51:04,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:51:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:51:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282692571] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:51:10,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:51:10,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 9, 10, 10] total 35 [2021-10-16 02:51:10,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676103049] [2021-10-16 02:51:10,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-16 02:51:10,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:51:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-16 02:51:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1026, Unknown=2, NotChecked=0, Total=1332 [2021-10-16 02:51:10,377 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 37 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:51:56,808 WARN L207 SmtUtils]: Spent 8.06 s on a formula simplification that was a NOOP. DAG size: 67 [2021-10-16 02:52:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:52:17,948 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-10-16 02:52:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-16 02:52:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-10-16 02:52:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:52:17,951 INFO L225 Difference]: With dead ends: 148 [2021-10-16 02:52:17,951 INFO L226 Difference]: Without dead ends: 148 [2021-10-16 02:52:17,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 359 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 59342.2ms TimeCoverageRelationStatistics Valid=836, Invalid=2702, Unknown=2, NotChecked=0, Total=3540 [2021-10-16 02:52:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-16 02:52:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 117. [2021-10-16 02:52:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 116 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) [2021-10-16 02:52:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2021-10-16 02:52:17,957 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 67 [2021-10-16 02:52:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:52:17,957 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2021-10-16 02:52:17,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.444444444444445) internal successors, (160), 36 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:52:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2021-10-16 02:52:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-16 02:52:17,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:17,959 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-10-16 02:52:17,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:18,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:18,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:18,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:18,560 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:52:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 434350843, now seen corresponding path program 2 times [2021-10-16 02:52:18,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:52:18,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725497018] [2021-10-16 02:52:18,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:52:18,561 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:52:18,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:52:18,562 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:52:18,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-10-16 02:52:19,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:52:19,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:52:19,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:52:19,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:19,906 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:52:19,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:52:19,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:52:20,852 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:52:20,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 02:52:20,908 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:52:20,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 35 [2021-10-16 02:52:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-16 02:52:21,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-16 02:52:49,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:52:49,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725497018] [2021-10-16 02:52:49,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725497018] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:49,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1619400436] [2021-10-16 02:52:49,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:52:49,086 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:52:49,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:52:49,087 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:52:49,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-10-16 02:52:51,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:52:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:52:51,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:52:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:51,186 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:52:51,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:52:51,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:52:52,145 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:52:52,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 38 [2021-10-16 02:52:52,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 02:52:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-16 02:52:53,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-16 02:53:27,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1619400436] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:53:27,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783379048] [2021-10-16 02:53:27,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:53:27,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:53:27,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:53:27,870 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:53:27,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-16 02:53:29,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-16 02:53:29,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:53:29,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:53:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:29,856 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:53:29,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:53:29,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:30,768 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:53:30,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 02:53:30,826 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-10-16 02:53:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 38 [2021-10-16 02:53:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-16 02:53:31,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-10-16 02:54:05,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783379048] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:05,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:54:05,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 11 [2021-10-16 02:54:05,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020737400] [2021-10-16 02:54:05,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 02:54:05,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 02:54:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=114, Unknown=10, NotChecked=0, Total=156 [2021-10-16 02:54:05,211 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:54:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:25,939 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-10-16 02:54:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:54:25,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-16 02:54:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:25,942 INFO L225 Difference]: With dead ends: 116 [2021-10-16 02:54:25,942 INFO L226 Difference]: Without dead ends: 116 [2021-10-16 02:54:25,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 390 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 33662.8ms TimeCoverageRelationStatistics Valid=77, Invalid=184, Unknown=11, NotChecked=0, Total=272 [2021-10-16 02:54:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-16 02:54:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-16 02:54:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:54:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-10-16 02:54:25,946 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 68 [2021-10-16 02:54:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:25,947 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-10-16 02:54:25,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:54:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-10-16 02:54:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-16 02:54:25,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:25,949 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:54:25,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:26,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:26,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:26,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:54:26,550 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-10-16 02:54:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:26,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1572522744, now seen corresponding path program 3 times [2021-10-16 02:54:26,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:26,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770380610] [2021-10-16 02:54:26,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:54:26,551 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:26,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:26,551 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:26,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-16 02:54:29,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-16 02:54:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 02:54:29,362 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:54:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:54:29,858 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:54:29,858 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:54:29,859 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 02:54:29,861 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 02:54:29,861 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 02:54:29,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 02:54:29,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 02:54:29,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 02:54:29,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 02:54:29,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-16 02:54:29,862 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 02:54:29,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:30,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:54:30,090 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:54:30,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:54:30 BoogieIcfgContainer [2021-10-16 02:54:30,156 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:54:30,156 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:54:30,156 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:54:30,157 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:54:30,157 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:47:58" (3/4) ... [2021-10-16 02:54:30,159 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:54:30,252 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:54:30,252 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:54:30,253 INFO L168 Benchmark]: Toolchain (without parser) took 392910.41 ms. Allocated memory was 73.4 MB in the beginning and 148.9 MB in the end (delta: 75.5 MB). Free memory was 55.3 MB in the beginning and 42.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 108.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:54:30,253 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 73.4 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:54:30,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.21 ms. Allocated memory is still 73.4 MB. Free memory was 55.0 MB in the beginning and 45.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:54:30,254 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.73 ms. Allocated memory is still 73.4 MB. Free memory was 45.6 MB in the beginning and 57.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:54:30,254 INFO L168 Benchmark]: Boogie Preprocessor took 49.30 ms. Allocated memory is still 73.4 MB. Free memory was 57.0 MB in the beginning and 55.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:54:30,255 INFO L168 Benchmark]: RCFGBuilder took 417.69 ms. Allocated memory is still 73.4 MB. Free memory was 55.8 MB in the beginning and 44.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:54:30,255 INFO L168 Benchmark]: TraceAbstraction took 391976.02 ms. Allocated memory was 73.4 MB in the beginning and 148.9 MB in the end (delta: 75.5 MB). Free memory was 44.4 MB in the beginning and 30.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 91.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:54:30,255 INFO L168 Benchmark]: Witness Printer took 95.79 ms. Allocated memory is still 148.9 MB. Free memory was 30.0 MB in the beginning and 42.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:54:30,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 73.4 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.21 ms. Allocated memory is still 73.4 MB. Free memory was 55.0 MB in the beginning and 45.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 83.73 ms. Allocated memory is still 73.4 MB. Free memory was 45.6 MB in the beginning and 57.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.30 ms. Allocated memory is still 73.4 MB. Free memory was 57.0 MB in the beginning and 55.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 417.69 ms. Allocated memory is still 73.4 MB. Free memory was 55.8 MB in the beginning and 44.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 391976.02 ms. Allocated memory was 73.4 MB in the beginning and 148.9 MB in the end (delta: 75.5 MB). Free memory was 44.4 MB in the beginning and 30.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 91.3 MB. Max. memory is 16.1 GB. * Witness Printer took 95.79 ms. Allocated memory is still 148.9 MB. Free memory was 30.0 MB in the beginning and 42.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; VAL [array={3:0}] [L5] int i = 0; VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND TRUE i < 10 VAL [array={3:0}] [L6] array[i] = i VAL [array={3:0}] [L5] ++i VAL [array={3:0}] [L5] COND FALSE !(i < 10) VAL [array={3:0}] [L9] return array; VAL [array={3:0}] [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND TRUE i < 10 VAL [array={3:0}] [L18] EXPR numbers[i] VAL [array={3:0}] [L18] numbers2[i] = numbers[i] VAL [array={3:0}] [L17] ++i VAL [array={3:0}] [L17] COND FALSE !(i < 10) VAL [array={3:0}] [L21] return numbers2; [L21] return numbers2; VAL [array={3:0}] [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - UnprovableResult [Line: 6]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 391857.1ms, OverallIterations: 17, TraceHistogramMax: 15, EmptinessCheckTime: 24.0ms, AutomataDifference: 133399.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 260 SDtfs, 3306 SDslu, 1157 SDs, 0 SdLazy, 3005 SolverSat, 550 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 51860.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2872 GetRequests, 2522 SyntacticMatches, 7 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3863 ImplicationChecksByTransitivity, 171393.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=15, InterpolantAutomatonStates: 168, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 90.9ms AutomataMinimizationTime, 16 MinimizatonAttempts, 300 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 321.3ms SsaConstructionTime, 6325.6ms SatisfiabilityAnalysisTime, 218209.4ms InterpolantComputationTime, 1529 NumberOfCodeBlocks, 1337 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 2796 ConstructedInterpolants, 550 QuantifiedInterpolants, 48257 SizeOfPredicates, 79 NumberOfNonLiveVariables, 3441 ConjunctsInSsa, 385 ConjunctsInUnsatCore, 84 InterpolantComputations, 12 PerfectInterpolantSequences, 5729/8816 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 02:54:30,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95eebaa5-413b-46ab-9657-3998f74e7118/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...