./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8 --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 bb07a385d9ee58b3b4f70410fbd2936e86f27502 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8 --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 bb07a385d9ee58b3b4f70410fbd2936e86f27502 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:58:59,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:58:59,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:58:59,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:58:59,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:58:59,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:58:59,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:58:59,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:58:59,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:58:59,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:58:59,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:58:59,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:58:59,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:58:59,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:58:59,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:58:59,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:58:59,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:58:59,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:58:59,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:58:59,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:58:59,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:58:59,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:58:59,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:58:59,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:58:59,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:58:59,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:58:59,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:58:59,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:58:59,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:58:59,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:58:59,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:58:59,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:58:59,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:58:59,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:58:59,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:58:59,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:58:59,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:58:59,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:58:59,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:58:59,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:58:59,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:58:59,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 06:58:59,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:58:59,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:58:59,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:58:59,760 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:58:59,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:58:59,760 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:58:59,761 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:58:59,761 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:58:59,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:58:59,761 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:58:59,762 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:58:59,763 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:58:59,763 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:58:59,763 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:58:59,763 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:58:59,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 06:58:59,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 06:58:59,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:58:59,766 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:58:59,766 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 06:58:59,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:58:59,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:58:59,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:58:59,767 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 06:58:59,767 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 06:58:59,767 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 06:58:59,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:58:59,769 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:58:59,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:58:59,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:58:59,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:58:59,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:58:59,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:58:59,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:58:59,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:58:59,771 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:58:59,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:58:59,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:58:59,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:58:59,772 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_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07a385d9ee58b3b4f70410fbd2936e86f27502 [2021-10-13 06:59:00,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:59:00,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:59:00,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:59:00,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:59:00,170 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:59:00,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-10-13 06:59:00,261 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data/f0391ddaa/507258bf9b84420d8db213678586ec5e/FLAG864546d67 [2021-10-13 06:59:00,840 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:59:00,841 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-10-13 06:59:00,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data/f0391ddaa/507258bf9b84420d8db213678586ec5e/FLAG864546d67 [2021-10-13 06:59:01,153 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data/f0391ddaa/507258bf9b84420d8db213678586ec5e [2021-10-13 06:59:01,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:59:01,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:59:01,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:59:01,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:59:01,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:59:01,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cac87c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01, skipping insertion in model container [2021-10-13 06:59:01,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:59:01,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:59:01,589 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-10-13 06:59:01,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:59:01,603 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:59:01,677 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-10-13 06:59:01,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:59:01,730 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:59:01,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01 WrapperNode [2021-10-13 06:59:01,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:59:01,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:59:01,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:59:01,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:59:01,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:59:01,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:59:01,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:59:01,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:59:01,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:59:01,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:59:01,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:59:01,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:59:01,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (1/1) ... [2021-10-13 06:59:01,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:59:01,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:01,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:59:01,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:59:01,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:59:01,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:59:01,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:59:01,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:59:01,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:59:01,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:59:01,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:59:01,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 06:59:01,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:59:01,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:59:01,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:59:02,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:59:02,678 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-13 06:59:02,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:02 BoogieIcfgContainer [2021-10-13 06:59:02,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:59:02,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:59:02,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:59:02,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:59:02,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:59:01" (1/3) ... [2021-10-13 06:59:02,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2d9c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:02, skipping insertion in model container [2021-10-13 06:59:02,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:01" (2/3) ... [2021-10-13 06:59:02,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2d9c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:02, skipping insertion in model container [2021-10-13 06:59:02,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:02" (3/3) ... [2021-10-13 06:59:02,692 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2021-10-13 06:59:02,698 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:59:02,699 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-10-13 06:59:02,765 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:59:02,781 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 [2021-10-13 06:59:02,781 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-10-13 06:59:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 06:59:02,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:02,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 06:59:02,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:02,820 INFO L82 PathProgramCache]: Analyzing trace with hash 5642482, now seen corresponding path program 1 times [2021-10-13 06:59:02,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:02,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162860616] [2021-10-13 06:59:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:02,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:03,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:03,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162860616] [2021-10-13 06:59:03,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162860616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:03,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:03,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:59:03,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194911779] [2021-10-13 06:59:03,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:59:03,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:59:03,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:59:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:03,211 INFO L87 Difference]: Start difference. First operand has 67 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:03,269 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-10-13 06:59:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:59:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 [2021-10-13 06:59:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:03,284 INFO L225 Difference]: With dead ends: 79 [2021-10-13 06:59:03,285 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 06:59:03,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 06:59:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2021-10-13 06:59:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 30 states have (on average 2.3) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-10-13 06:59:03,340 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 4 [2021-10-13 06:59:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:03,342 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-10-13 06:59:03,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-10-13 06:59:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 06:59:03,343 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:03,343 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 06:59:03,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:59:03,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash 5491669, now seen corresponding path program 1 times [2021-10-13 06:59:03,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:03,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215995231] [2021-10-13 06:59:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:03,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:03,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215995231] [2021-10-13 06:59:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215995231] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:03,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:03,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:59:03,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530697019] [2021-10-13 06:59:03,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:59:03,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:59:03,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:59:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:03,400 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:03,480 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-10-13 06:59:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:59:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 [2021-10-13 06:59:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:03,482 INFO L225 Difference]: With dead ends: 71 [2021-10-13 06:59:03,482 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 06:59:03,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 06:59:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2021-10-13 06:59:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-10-13 06:59:03,491 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 4 [2021-10-13 06:59:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:03,492 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-10-13 06:59:03,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,492 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-10-13 06:59:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 06:59:03,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:03,493 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 06:59:03,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 06:59:03,494 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:03,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:03,495 INFO L82 PathProgramCache]: Analyzing trace with hash 5491670, now seen corresponding path program 1 times [2021-10-13 06:59:03,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:03,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295243128] [2021-10-13 06:59:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:03,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:03,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:03,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295243128] [2021-10-13 06:59:03,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295243128] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:03,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:03,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:59:03,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15926174] [2021-10-13 06:59:03,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:59:03,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:59:03,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:59:03,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:03,582 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:03,650 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-10-13 06:59:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:59:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 [2021-10-13 06:59:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:03,652 INFO L225 Difference]: With dead ends: 57 [2021-10-13 06:59:03,652 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 06:59:03,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 06:59:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-13 06:59:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 30 states have (on average 2.033333333333333) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-10-13 06:59:03,660 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 4 [2021-10-13 06:59:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:03,660 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-10-13 06:59:03,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-10-13 06:59:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 06:59:03,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:03,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 06:59:03,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 06:59:03,662 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:03,663 INFO L82 PathProgramCache]: Analyzing trace with hash 982530640, now seen corresponding path program 1 times [2021-10-13 06:59:03,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:03,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283152018] [2021-10-13 06:59:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:03,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:03,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:03,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283152018] [2021-10-13 06:59:03,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283152018] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:03,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:03,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 06:59:03,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024036963] [2021-10-13 06:59:03,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:03,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:59:03,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:03,791 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:03,933 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-10-13 06:59:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:03,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 06:59:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:03,939 INFO L225 Difference]: With dead ends: 69 [2021-10-13 06:59:03,939 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 06:59:03,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:59:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 06:59:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2021-10-13 06:59:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 2.0) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-10-13 06:59:03,951 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 6 [2021-10-13 06:59:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:03,952 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-10-13 06:59:03,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-10-13 06:59:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 06:59:03,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:03,953 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 06:59:03,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 06:59:03,954 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash 982530641, now seen corresponding path program 1 times [2021-10-13 06:59:03,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:03,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844357556] [2021-10-13 06:59:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:03,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:04,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:04,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844357556] [2021-10-13 06:59:04,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844357556] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:04,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:04,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 06:59:04,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493876282] [2021-10-13 06:59:04,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:04,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:59:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:04,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:04,032 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:04,139 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-10-13 06:59:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:04,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 06:59:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:04,141 INFO L225 Difference]: With dead ends: 58 [2021-10-13 06:59:04,141 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 06:59:04,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:59:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 06:59:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-10-13 06:59:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 54 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-10-13 06:59:04,156 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 6 [2021-10-13 06:59:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:04,157 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-10-13 06:59:04,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-10-13 06:59:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:59:04,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:04,158 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:04,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 06:59:04,158 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:04,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1123494935, now seen corresponding path program 1 times [2021-10-13 06:59:04,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:59:04,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198758125] [2021-10-13 06:59:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:04,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:59:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:04,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:59:04,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198758125] [2021-10-13 06:59:04,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198758125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:59:04,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804301434] [2021-10-13 06:59:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:04,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:04,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:04,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:59:04,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:59:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:04,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:59:04,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:04,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:04,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804301434] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:59:04,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854446242] [2021-10-13 06:59:04,654 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-13 06:59:04,654 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:59:04,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:59:04,666 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:59:04,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:59:04,712 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:04,720 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:59:04,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:04,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 06:59:04,727 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:59:04,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:04,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 06:59:04,736 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-13 06:59:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:04,834 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 06:59:04,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 06:59:04,837 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:04,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 06:59:04,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:04,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 06:59:04,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:59:04,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:59:04,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:04,884 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:04,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-13 06:59:04,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:59:04,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:134, output treesize:122 [2021-10-13 06:59:04,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:05,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:59:05,105 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_78| 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) [2021-10-13 06:59:05,109 INFO L168 Benchmark]: Toolchain (without parser) took 3950.92 ms. Allocated memory was 148.9 MB in the beginning and 180.4 MB in the end (delta: 31.5 MB). Free memory was 109.0 MB in the beginning and 107.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 31.8 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:05,110 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 148.9 MB. Free memory was 119.8 MB in the beginning and 119.8 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:59:05,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 567.81 ms. Allocated memory is still 148.9 MB. Free memory was 109.0 MB in the beginning and 113.5 MB in the end (delta: -4.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:05,111 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.36 ms. Allocated memory is still 148.9 MB. Free memory was 113.5 MB in the beginning and 111.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:05,112 INFO L168 Benchmark]: Boogie Preprocessor took 61.50 ms. Allocated memory is still 148.9 MB. Free memory was 111.3 MB in the beginning and 109.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:05,112 INFO L168 Benchmark]: RCFGBuilder took 802.08 ms. Allocated memory is still 148.9 MB. Free memory was 109.4 MB in the beginning and 86.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:05,113 INFO L168 Benchmark]: TraceAbstraction took 2425.29 ms. Allocated memory was 148.9 MB in the beginning and 180.4 MB in the end (delta: 31.5 MB). Free memory was 85.5 MB in the beginning and 107.9 MB in the end (delta: -22.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:59:05,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 148.9 MB. Free memory was 119.8 MB in the beginning and 119.8 MB in the end (delta: 30.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 567.81 ms. Allocated memory is still 148.9 MB. Free memory was 109.0 MB in the beginning and 113.5 MB in the end (delta: -4.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.36 ms. Allocated memory is still 148.9 MB. Free memory was 113.5 MB in the beginning and 111.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.50 ms. Allocated memory is still 148.9 MB. Free memory was 111.3 MB in the beginning and 109.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 802.08 ms. Allocated memory is still 148.9 MB. Free memory was 109.4 MB in the beginning and 86.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2425.29 ms. Allocated memory was 148.9 MB in the beginning and 180.4 MB in the end (delta: 31.5 MB). Free memory was 85.5 MB in the beginning and 107.9 MB in the end (delta: -22.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_78| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_78|: 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. [2021-10-13 06:59:05,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:59:08,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:59:08,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:59:08,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:59:08,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:59:08,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:59:08,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:59:08,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:59:08,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:59:08,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:59:08,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:59:08,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:59:08,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:59:08,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:59:08,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:59:08,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:59:08,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:59:08,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:59:08,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:59:08,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:59:08,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:59:08,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:59:08,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:59:08,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:59:08,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:59:08,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:59:08,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:59:08,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:59:08,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:59:08,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:59:08,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:59:08,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:59:08,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:59:08,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:59:08,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:59:08,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:59:08,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:59:08,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:59:08,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:59:08,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:59:08,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:59:08,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 06:59:08,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:59:08,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:59:08,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:59:08,251 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:59:08,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:59:08,252 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:59:08,252 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:59:08,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:59:08,253 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:59:08,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 06:59:08,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 06:59:08,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:59:08,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:59:08,257 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 06:59:08,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:59:08,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:59:08,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:59:08,258 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 06:59:08,258 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 06:59:08,259 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 06:59:08,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:59:08,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:59:08,259 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:59:08,260 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:59:08,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:59:08,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:59:08,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:59:08,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:59:08,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:59:08,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:59:08,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:59:08,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:59:08,263 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:59:08,263 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:59:08,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:59:08,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:59:08,264 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_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07a385d9ee58b3b4f70410fbd2936e86f27502 [2021-10-13 06:59:08,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:59:08,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:59:08,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:59:08,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:59:08,816 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:59:08,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-10-13 06:59:08,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data/605ae4818/045d57447d774bc8bb8f1d4c49424c3d/FLAGbdb40bc95 [2021-10-13 06:59:09,542 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:59:09,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2021-10-13 06:59:09,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data/605ae4818/045d57447d774bc8bb8f1d4c49424c3d/FLAGbdb40bc95 [2021-10-13 06:59:09,804 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/data/605ae4818/045d57447d774bc8bb8f1d4c49424c3d [2021-10-13 06:59:09,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:59:09,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:59:09,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:59:09,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:59:09,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:59:09,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:09" (1/1) ... [2021-10-13 06:59:09,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50422829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:09, skipping insertion in model container [2021-10-13 06:59:09,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:59:09" (1/1) ... [2021-10-13 06:59:09,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:59:09,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:59:10,303 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-10-13 06:59:10,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:59:10,322 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:59:10,393 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2021-10-13 06:59:10,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:59:10,432 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:59:10,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10 WrapperNode [2021-10-13 06:59:10,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:59:10,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:59:10,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:59:10,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:59:10,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:59:10,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:59:10,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:59:10,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:59:10,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:59:10,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:59:10,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:59:10,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:59:10,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (1/1) ... [2021-10-13 06:59:10,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:59:10,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:59:10,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:59:10,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:59:10,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:59:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:59:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:59:10,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:59:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:59:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:59:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:59:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 06:59:10,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:59:10,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:59:10,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:59:11,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:59:11,542 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-13 06:59:11,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:11 BoogieIcfgContainer [2021-10-13 06:59:11,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:59:11,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:59:11,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:59:11,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:59:11,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:59:09" (1/3) ... [2021-10-13 06:59:11,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f07d024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:11, skipping insertion in model container [2021-10-13 06:59:11,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:59:10" (2/3) ... [2021-10-13 06:59:11,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f07d024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:59:11, skipping insertion in model container [2021-10-13 06:59:11,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:11" (3/3) ... [2021-10-13 06:59:11,554 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2021-10-13 06:59:11,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:59:11,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-10-13 06:59:11,614 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:59:11,622 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 [2021-10-13 06:59:11,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-10-13 06:59:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 06:59:11,672 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:11,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 06:59:11,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash 28698858, now seen corresponding path program 1 times [2021-10-13 06:59:11,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:11,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501181008] [2021-10-13 06:59:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:11,697 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:11,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:11,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:11,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:59:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:11,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:59:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:11,916 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 [2021-10-13 06:59:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:11,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:11,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:11,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501181008] [2021-10-13 06:59:11,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501181008] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:11,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:11,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:59:12,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37705124] [2021-10-13 06:59:12,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:59:12,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:59:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:12,035 INFO L87 Difference]: Start difference. First operand has 84 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 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 2.5) internal successors, (5), 3 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) [2021-10-13 06:59:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:12,338 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2021-10-13 06:59:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:59:12,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2021-10-13 06:59:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:12,358 INFO L225 Difference]: With dead ends: 95 [2021-10-13 06:59:12,358 INFO L226 Difference]: Without dead ends: 91 [2021-10-13 06:59:12,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:59:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-13 06:59:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-10-13 06:59:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 75 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) [2021-10-13 06:59:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-10-13 06:59:12,417 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 5 [2021-10-13 06:59:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:12,418 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-10-13 06:59:12,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2021-10-13 06:59:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-10-13 06:59:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 06:59:12,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:12,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 06:59:12,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:12,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:12,638 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:12,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:12,639 INFO L82 PathProgramCache]: Analyzing trace with hash 28698859, now seen corresponding path program 1 times [2021-10-13 06:59:12,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:12,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829630555] [2021-10-13 06:59:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:12,648 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:12,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:12,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:12,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:59:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:59:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:12,747 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 [2021-10-13 06:59:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:12,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:12,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:12,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829630555] [2021-10-13 06:59:12,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829630555] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:12,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:12,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 06:59:12,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990807802] [2021-10-13 06:59:12,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:12,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:12,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:12,876 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-10-13 06:59:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:13,091 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2021-10-13 06:59:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:59:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 5 [2021-10-13 06:59:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:13,094 INFO L225 Difference]: With dead ends: 75 [2021-10-13 06:59:13,094 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 06:59:13,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 06:59:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-10-13 06:59:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-10-13 06:59:13,103 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 5 [2021-10-13 06:59:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:13,104 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-10-13 06:59:13,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-10-13 06:59:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-10-13 06:59:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 06:59:13,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:13,106 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:13,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 06:59:13,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:13,319 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash -245418610, now seen corresponding path program 1 times [2021-10-13 06:59:13,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:13,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052860586] [2021-10-13 06:59:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:13,321 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:13,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:13,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:13,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:59:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:13,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:13,438 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 [2021-10-13 06:59:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:13,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:13,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:13,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052860586] [2021-10-13 06:59:13,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052860586] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:13,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:13,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 06:59:13,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667708087] [2021-10-13 06:59:13,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:59:13,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:59:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:59:13,567 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:14,168 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2021-10-13 06:59:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:59:14,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-10-13 06:59:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:14,171 INFO L225 Difference]: With dead ends: 146 [2021-10-13 06:59:14,172 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 06:59:14,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:59:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 06:59:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 71. [2021-10-13 06:59:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-13 06:59:14,186 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 9 [2021-10-13 06:59:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:14,187 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-13 06:59:14,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-13 06:59:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 06:59:14,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:14,192 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:14,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:14,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:14,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash -245418609, now seen corresponding path program 1 times [2021-10-13 06:59:14,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:14,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897337711] [2021-10-13 06:59:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:14,406 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:14,413 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 06:59:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:59:14,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:14,527 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 [2021-10-13 06:59:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:14,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:14,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:15,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897337711] [2021-10-13 06:59:15,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897337711] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:15,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:15,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 06:59:15,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562083041] [2021-10-13 06:59:15,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:59:15,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:59:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:59:15,002 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:15,798 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2021-10-13 06:59:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:59:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 9 [2021-10-13 06:59:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:15,801 INFO L225 Difference]: With dead ends: 135 [2021-10-13 06:59:15,801 INFO L226 Difference]: Without dead ends: 135 [2021-10-13 06:59:15,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-13 06:59:15,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-13 06:59:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 70. [2021-10-13 06:59:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-10-13 06:59:15,811 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 9 [2021-10-13 06:59:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:15,812 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-10-13 06:59:15,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-10-13 06:59:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:59:15,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:15,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:15,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:16,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:16,017 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:16,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1442029390, now seen corresponding path program 1 times [2021-10-13 06:59:16,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:16,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639578838] [2021-10-13 06:59:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:16,019 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:16,020 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:16,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:59:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:16,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:16,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:16,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:16,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:16,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639578838] [2021-10-13 06:59:16,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639578838] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:16,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:16,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:59:16,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489614501] [2021-10-13 06:59:16,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:59:16,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:16,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:59:16,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:16,192 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:16,210 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-10-13 06:59:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:16,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-10-13 06:59:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:16,213 INFO L225 Difference]: With dead ends: 80 [2021-10-13 06:59:16,213 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 06:59:16,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:59:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 06:59:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-13 06:59:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-10-13 06:59:16,222 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 11 [2021-10-13 06:59:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:16,222 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-10-13 06:59:16,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-10-13 06:59:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 06:59:16,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:16,225 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:16,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:16,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:16,449 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1941472818, now seen corresponding path program 1 times [2021-10-13 06:59:16,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:16,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566619250] [2021-10-13 06:59:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:16,450 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:16,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:16,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 06:59:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:16,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:59:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:16,728 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 [2021-10-13 06:59:16,796 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 06:59:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-13 06:59:17,410 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 06:59:17,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 55 [2021-10-13 06:59:18,215 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 06:59:18,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 61 [2021-10-13 06:59:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:19,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:21,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:21,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566619250] [2021-10-13 06:59:21,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566619250] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 06:59:21,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 06:59:21,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-13 06:59:21,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613076733] [2021-10-13 06:59:21,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:59:21,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:59:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=58, Unknown=1, NotChecked=0, Total=90 [2021-10-13 06:59:21,521 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:21,993 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-10-13 06:59:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:59:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-10-13 06:59:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:21,994 INFO L225 Difference]: With dead ends: 88 [2021-10-13 06:59:21,995 INFO L226 Difference]: Without dead ends: 88 [2021-10-13 06:59:21,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2441.2ms TimeCoverageRelationStatistics Valid=37, Invalid=72, Unknown=1, NotChecked=0, Total=110 [2021-10-13 06:59:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-13 06:59:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-10-13 06:59:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 75 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) [2021-10-13 06:59:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-10-13 06:59:22,003 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 29 [2021-10-13 06:59:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:22,004 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-10-13 06:59:22,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-10-13 06:59:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 06:59:22,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:22,006 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:22,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 06:59:22,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:22,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1941472817, now seen corresponding path program 1 times [2021-10-13 06:59:22,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:22,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674281441] [2021-10-13 06:59:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:22,214 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:22,215 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:22,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 06:59:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:22,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 06:59:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:22,554 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 [2021-10-13 06:59:22,562 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 [2021-10-13 06:59:22,649 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 06:59:22,650 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 28 treesize of output 30 [2021-10-13 06:59:22,661 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 06:59:22,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 06:59:22,964 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-13 06:59:22,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-10-13 06:59:23,667 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-13 06:59:23,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 32 [2021-10-13 06:59:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:24,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:59:27,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:27,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674281441] [2021-10-13 06:59:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674281441] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 06:59:27,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 06:59:27,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-13 06:59:27,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240442777] [2021-10-13 06:59:27,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:59:27,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:59:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=1, NotChecked=0, Total=90 [2021-10-13 06:59:27,712 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:28,529 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-10-13 06:59:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:59:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-10-13 06:59:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:28,532 INFO L225 Difference]: With dead ends: 72 [2021-10-13 06:59:28,532 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 06:59:28,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2631.1ms TimeCoverageRelationStatistics Valid=36, Invalid=73, Unknown=1, NotChecked=0, Total=110 [2021-10-13 06:59:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 06:59:28,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-13 06:59:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:28,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-10-13 06:59:28,539 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 29 [2021-10-13 06:59:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:28,540 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-10-13 06:59:28,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-10-13 06:59:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 06:59:28,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:28,542 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:28,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-13 06:59:28,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:28,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:28,750 INFO L82 PathProgramCache]: Analyzing trace with hash -56115186, now seen corresponding path program 1 times [2021-10-13 06:59:28,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:28,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947806053] [2021-10-13 06:59:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:28,751 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:28,752 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:28,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:59:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:59:29,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:29,124 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 [2021-10-13 06:59:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:29,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:29,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:29,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947806053] [2021-10-13 06:59:29,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947806053] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:29,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:29,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 06:59:29,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938562554] [2021-10-13 06:59:29,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:59:29,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:59:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:59:29,274 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:29,559 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-10-13 06:59:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:59:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 30 [2021-10-13 06:59:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:29,561 INFO L225 Difference]: With dead ends: 83 [2021-10-13 06:59:29,561 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 06:59:29,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:59:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 06:59:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2021-10-13 06:59:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-13 06:59:29,572 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 30 [2021-10-13 06:59:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:29,573 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-13 06:59:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-13 06:59:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 06:59:29,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:29,575 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:29,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 06:59:29,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:29,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:29,790 INFO L82 PathProgramCache]: Analyzing trace with hash -56115185, now seen corresponding path program 1 times [2021-10-13 06:59:29,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:29,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568178859] [2021-10-13 06:59:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:29,792 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:29,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:29,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:29,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 06:59:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:30,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:59:30,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:30,245 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 [2021-10-13 06:59:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:30,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:30,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:30,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568178859] [2021-10-13 06:59:30,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568178859] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:30,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:30,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 06:59:30,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306694214] [2021-10-13 06:59:30,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:59:30,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:30,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:59:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:59:30,708 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:31,140 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-10-13 06:59:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:59:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 30 [2021-10-13 06:59:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:31,142 INFO L225 Difference]: With dead ends: 70 [2021-10-13 06:59:31,142 INFO L226 Difference]: Without dead ends: 70 [2021-10-13 06:59:31,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:59:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-13 06:59:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-13 06:59:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-10-13 06:59:31,148 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 30 [2021-10-13 06:59:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:31,149 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-10-13 06:59:31,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-10-13 06:59:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 06:59:31,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:31,151 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:31,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:31,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:31,357 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1881667274, now seen corresponding path program 1 times [2021-10-13 06:59:31,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:31,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918621949] [2021-10-13 06:59:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:31,359 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:31,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:31,378 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:31,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 06:59:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 06:59:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:31,818 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 [2021-10-13 06:59:32,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-13 06:59:32,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-13 06:59:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:32,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:32,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-13 06:59:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:32,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:32,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918621949] [2021-10-13 06:59:32,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918621949] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:32,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:32,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-13 06:59:32,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040159867] [2021-10-13 06:59:32,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 06:59:32,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 06:59:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-13 06:59:32,556 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:33,274 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-10-13 06:59:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 06:59:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-10-13 06:59:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:33,275 INFO L225 Difference]: With dead ends: 81 [2021-10-13 06:59:33,275 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 06:59:33,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-13 06:59:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 06:59:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2021-10-13 06:59:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.290909090909091) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-10-13 06:59:33,280 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 35 [2021-10-13 06:59:33,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:33,280 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-10-13 06:59:33,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-10-13 06:59:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 06:59:33,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:33,284 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:33,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:33,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:33,489 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:33,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1881667273, now seen corresponding path program 1 times [2021-10-13 06:59:33,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:33,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524265152] [2021-10-13 06:59:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:33,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:33,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:33,495 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:33,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 06:59:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:33,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 06:59:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:33,951 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 [2021-10-13 06:59:34,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:59:34,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 06:59:34,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-13 06:59:34,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-10-13 06:59:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:34,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:34,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-10-13 06:59:34,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:34,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:34,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:35,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:35,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524265152] [2021-10-13 06:59:35,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524265152] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:35,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:35,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-13 06:59:35,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530323268] [2021-10-13 06:59:35,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 06:59:35,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:35,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 06:59:35,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-13 06:59:35,143 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:36,376 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-10-13 06:59:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 06:59:36,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-10-13 06:59:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:36,379 INFO L225 Difference]: With dead ends: 69 [2021-10-13 06:59:36,379 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 06:59:36,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 944.5ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-10-13 06:59:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 06:59:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2021-10-13 06:59:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-10-13 06:59:36,384 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 35 [2021-10-13 06:59:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:36,384 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-10-13 06:59:36,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:59:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-10-13 06:59:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 06:59:36,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:36,386 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:36,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:36,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:36,601 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:36,601 INFO L82 PathProgramCache]: Analyzing trace with hash -101017195, now seen corresponding path program 1 times [2021-10-13 06:59:36,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:36,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700734194] [2021-10-13 06:59:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:36,602 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:36,603 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:36,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 06:59:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 06:59:37,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:37,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:59:37,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:37,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 06:59:37,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-13 06:59:37,882 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-13 06:59:37,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2021-10-13 06:59:37,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:59:37,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-10-13 06:59:38,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-10-13 06:59:38,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-10-13 06:59:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:38,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2021-10-13 06:59:38,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 98 [2021-10-13 06:59:38,469 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:38,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-13 06:59:39,927 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:39,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-13 06:59:41,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 108 [2021-10-13 06:59:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 06:59:42,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:59:42,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700734194] [2021-10-13 06:59:42,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700734194] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:59:42,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:59:42,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2021-10-13 06:59:42,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472934656] [2021-10-13 06:59:42,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 06:59:42,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:59:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 06:59:42,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-10-13 06:59:42,101 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-10-13 06:59:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:59:45,760 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-10-13 06:59:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 06:59:45,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-13 06:59:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:59:45,763 INFO L225 Difference]: With dead ends: 65 [2021-10-13 06:59:45,763 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 06:59:45,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3465.5ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-10-13 06:59:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 06:59:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-13 06:59:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 64 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) [2021-10-13 06:59:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-10-13 06:59:45,768 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 37 [2021-10-13 06:59:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:59:45,768 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-10-13 06:59:45,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-10-13 06:59:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-10-13 06:59:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 06:59:45,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:59:45,770 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:59:45,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 06:59:45,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:59:45,981 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 06:59:45,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:59:45,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1368928765, now seen corresponding path program 1 times [2021-10-13 06:59:45,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:59:45,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173529798] [2021-10-13 06:59:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:59:45,982 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:59:45,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:59:45,983 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:59:45,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 06:59:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:59:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 06:59:46,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:59:46,667 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 [2021-10-13 06:59:46,904 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-10-13 06:59:46,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 41 [2021-10-13 06:59:47,099 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 06:59:47,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2021-10-13 06:59:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:59:47,309 INFO L354 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-10-13 06:59:47,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 58 [2021-10-13 06:59:48,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 06:59:48,155 INFO L354 Elim1Store]: treesize reduction 28, result has 44.0 percent of original size [2021-10-13 06:59:48,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 62 [2021-10-13 06:59:48,604 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 06:59:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 61 [2021-10-13 06:59:48,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:59:48,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2021-10-13 06:59:49,388 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 06:59:49,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 40 [2021-10-13 06:59:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:59:49,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:59:50,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 100 [2021-10-13 06:59:58,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:59:58,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 298 [2021-10-13 07:00:25,847 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_arrayElimCell_39 (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse0 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse4 (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_3))) (store .cse4 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse4) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse3 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse3 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))))) (or (and (= c_ULTIMATE.start_sll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select .cse0 .cse1)))))))))))))))) (_ bv1 1))) (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_sll_prepend_~head.offset)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select .cse0 (bvadd (_ bv4 32) v_arrayElimCell_39))))))))))))))))))))))) is different from false [2021-10-13 07:00:26,205 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-10-13 07:00:26,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30475 treesize of output 29763 [2021-10-13 07:00:41,614 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:00:41,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2021-10-13 07:00:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:00:41,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:41,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173529798] [2021-10-13 07:00:41,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173529798] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:00:41,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:00:41,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19] total 36 [2021-10-13 07:00:41,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408074081] [2021-10-13 07:00:41,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 07:00:41,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 07:00:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1145, Unknown=14, NotChecked=68, Total=1332 [2021-10-13 07:00:41,910 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 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) [2021-10-13 07:01:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:02,323 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-10-13 07:01:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 07:01:02,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 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 40 [2021-10-13 07:01:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:02,325 INFO L225 Difference]: With dead ends: 101 [2021-10-13 07:01:02,325 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 07:01:02,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 58421.8ms TimeCoverageRelationStatistics Valid=440, Invalid=2202, Unknown=14, NotChecked=100, Total=2756 [2021-10-13 07:01:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 07:01:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2021-10-13 07:01:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.263157894736842) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-10-13 07:01:02,331 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 40 [2021-10-13 07:01:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:02,332 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-10-13 07:01:02,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 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) [2021-10-13 07:01:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-10-13 07:01:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 07:01:02,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:02,334 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:02,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:02,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:01:02,550 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:01:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:02,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1368928766, now seen corresponding path program 1 times [2021-10-13 07:01:02,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:01:02,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238169972] [2021-10-13 07:01:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:02,552 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:01:02,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:01:02,552 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:01:02,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:01:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:03,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 07:01:03,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:03,304 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 [2021-10-13 07:01:03,316 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 [2021-10-13 07:01:03,839 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:01:03,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-13 07:01:03,862 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 16 treesize of output 18 [2021-10-13 07:01:04,141 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:01:04,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:01:04,204 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 07:01:04,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2021-10-13 07:01:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:01:04,531 INFO L354 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-10-13 07:01:04,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 31 [2021-10-13 07:01:04,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:01:04,605 INFO L354 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-10-13 07:01:04,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 50 [2021-10-13 07:01:05,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:01:05,723 INFO L354 Elim1Store]: treesize reduction 28, result has 44.0 percent of original size [2021-10-13 07:01:05,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 54 [2021-10-13 07:01:05,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:01:05,862 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-13 07:01:05,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 23 [2021-10-13 07:01:06,366 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 07:01:06,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 78 [2021-10-13 07:01:06,402 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-10-13 07:01:06,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 80 [2021-10-13 07:01:07,429 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-13 07:01:07,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 57 [2021-10-13 07:01:07,457 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 07:01:07,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2021-10-13 07:01:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:08,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:13,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:13,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 630 [2021-10-13 07:01:13,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:13,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 767 [2021-10-13 07:01:47,945 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (let ((.cse0 (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse1 (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse6 (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse4 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_5))) (store .cse6 .cse4 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse6) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse5 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse5 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset))))) (select (select .cse1 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse3 (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse4 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_4))) (store .cse3 .cse4 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse3) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse2 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse2 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))) |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (bvadd (_ bv4 32) (select (select .cse1 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))))))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (let ((.cse13 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse7 (let ((.cse14 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse15 (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse13 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_5))) (store .cse15 .cse13 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse15) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse14 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse14 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse10 (let ((.cse11 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse12 (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse13 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_4))) (store .cse12 .cse13 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse12) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse11 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse11 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse8 (select (select .cse10 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse9 (bvadd (_ bv4 32) (select (select .cse7 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))) (bvule (bvadd (_ bv8 32) (select (select .cse7 .cse8) .cse9)) (select |c_#length| (select (select .cse10 .cse8) .cse9)))))))) is different from false [2021-10-13 07:01:48,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1042 treesize of output 1030 [2021-10-13 07:01:48,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1332 treesize of output 1284 [2021-10-13 07:04:43,372 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 13 [2021-10-13 07:04:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:04:43,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:04:43,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238169972] [2021-10-13 07:04:43,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238169972] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:04:43,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:04:43,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [19] total 36 [2021-10-13 07:04:43,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784273258] [2021-10-13 07:04:43,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 07:04:43,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:04:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 07:04:43,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1148, Unknown=11, NotChecked=68, Total=1332 [2021-10-13 07:04:43,737 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 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) [2021-10-13 07:05:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:05:15,092 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-10-13 07:05:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 07:05:15,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 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 40 [2021-10-13 07:05:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:05:15,095 INFO L225 Difference]: With dead ends: 113 [2021-10-13 07:05:15,095 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 07:05:15,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 64634.1ms TimeCoverageRelationStatistics Valid=461, Invalid=2392, Unknown=13, NotChecked=104, Total=2970 [2021-10-13 07:05:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 07:05:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2021-10-13 07:05:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:05:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-13 07:05:15,101 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 40 [2021-10-13 07:05:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:05:15,101 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-13 07:05:15,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 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) [2021-10-13 07:05:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-13 07:05:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 07:05:15,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:05:15,103 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:05:15,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:05:15,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:05:15,313 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:05:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:05:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash -512882532, now seen corresponding path program 1 times [2021-10-13 07:05:15,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:05:15,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034927243] [2021-10-13 07:05:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:05:15,314 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:05:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:05:15,315 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:05:15,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:05:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:05:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 07:05:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:05:16,591 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-13 07:05:16,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2021-10-13 07:05:16,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:05:16,854 INFO L354 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-10-13 07:05:16,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 32 [2021-10-13 07:05:17,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:05:17,462 INFO L354 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2021-10-13 07:05:17,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 40 [2021-10-13 07:05:17,745 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 07:05:17,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 28 [2021-10-13 07:05:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:05:17,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-10-13 07:05:18,296 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 07:05:18,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 17 [2021-10-13 07:05:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:05:18,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:05:18,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2021-10-13 07:05:29,321 WARN L207 SmtUtils]: Spent 10.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-10-13 07:06:08,770 WARN L207 SmtUtils]: Spent 6.08 s on a formula simplification that was a NOOP. DAG size: 34 [2021-10-13 07:06:40,458 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 35 [2021-10-13 07:06:42,513 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (_ bv0 32) (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset))))) (store .cse1 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse1 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) .cse2)))) (or (and (= c_ULTIMATE.start_sll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|) (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_sll_prepend_~head.offset)) (forall ((v_arrayElimCell_80 (_ BitVec 32))) (not (= (select (let ((.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|) (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset))))) (store .cse4 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse4 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|))))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) v_arrayElimCell_80)) (_ bv0 32)))))) is different from false [2021-10-13 07:06:46,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:06:46,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 269 [2021-10-13 07:07:08,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 95 [2021-10-13 07:07:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:07:10,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:07:10,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034927243] [2021-10-13 07:07:10,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034927243] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:07:10,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:07:10,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19, 20] imperfect sequences [] total 35 [2021-10-13 07:07:10,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385867682] [2021-10-13 07:07:10,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 07:07:10,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:07:10,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 07:07:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=981, Unknown=34, NotChecked=64, Total=1190 [2021-10-13 07:07:10,279 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:25,784 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_sll_create_#res.base| (_ bv0 32))) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (_ bv4 32)) (_ bv0 32))) (not (= c_ULTIMATE.start_node_create_~temp~0.base (_ bv0 32))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_prepend_~head.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_sll_prepend_~new_head~1.base)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) c_ULTIMATE.start_sll_prepend_~new_head~1.offset)) (_ bv0 32))) (bvult |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0.base|) (exists ((|#StackHeapBarrier| (_ BitVec 32))) (and (bvult |#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0.base|) (bvult (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|) |#StackHeapBarrier|))) (not (= (_ bv0 32) |c_ULTIMATE.start_node_create_#res.base|)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|) (_ bv0 32)) (not (= (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) (or (forall ((v_arrayElimCell_80 (_ BitVec 32))) (not (= (_ bv0 32) (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_prepend_~head.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_sll_prepend_~new_head~1.base)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) v_arrayElimCell_80))))) (and (= c_ULTIMATE.start_sll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|) (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_sll_prepend_~head.offset))) (not (= c_ULTIMATE.start_sll_create_~new_head~0.base (_ bv0 32)))) is different from false [2021-10-13 07:07:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:07:31,166 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-10-13 07:07:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 07:07:31,167 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-13 07:07:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:07:31,168 INFO L225 Difference]: With dead ends: 72 [2021-10-13 07:07:31,168 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 07:07:31,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 127848.0ms TimeCoverageRelationStatistics Valid=365, Invalid=1767, Unknown=38, NotChecked=182, Total=2352 [2021-10-13 07:07:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 07:07:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-10-13 07:07:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-10-13 07:07:31,172 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 41 [2021-10-13 07:07:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:07:31,172 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-10-13 07:07:31,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:07:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-10-13 07:07:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 07:07:31,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:07:31,174 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:07:31,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:07:31,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:07:31,374 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:07:31,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:07:31,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2044526556, now seen corresponding path program 1 times [2021-10-13 07:07:31,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:07:31,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502856237] [2021-10-13 07:07:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:31,375 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:07:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:07:31,376 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:07:31,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:07:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:32,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 07:07:32,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:07:32,652 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 [2021-10-13 07:07:32,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:07:33,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:07:33,621 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:07:33,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-10-13 07:07:33,997 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:07:33,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2021-10-13 07:07:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:34,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2021-10-13 07:07:34,085 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:07:34,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:07:34,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:34,341 INFO L354 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-10-13 07:07:34,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 31 [2021-10-13 07:07:34,399 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:07:34,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-10-13 07:07:34,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:34,458 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-13 07:07:34,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 40 [2021-10-13 07:07:35,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:07:35,518 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:07:35,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 66 [2021-10-13 07:07:35,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:35,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2021-10-13 07:07:35,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:07:35,610 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-13 07:07:35,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 23 [2021-10-13 07:07:36,017 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 07:07:36,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 82 [2021-10-13 07:07:36,062 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-13 07:07:36,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 89 [2021-10-13 07:07:36,098 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-10-13 07:07:36,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 77 [2021-10-13 07:07:37,326 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-13 07:07:37,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 57 [2021-10-13 07:07:37,357 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 07:07:37,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2021-10-13 07:07:38,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-13 07:07:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:07:38,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:07:38,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:39,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-13 07:07:39,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:39,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-10-13 07:07:48,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:48,473 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 368 [2021-10-13 07:07:48,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:48,477 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 417 [2021-10-13 07:07:50,578 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_node_create_~data (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse9 (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_10))) (store .cse9 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse9) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse8 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse8 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse7 (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_9))) (store .cse7 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse7) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse6 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset ULTIMATE.start_node_create_~data) .cse1 v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset v_DerPreprocessor_7))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-10-13 07:07:50,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:50,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 547 [2021-10-13 07:07:52,783 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_node_create_~data (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= c_ULTIMATE.start_main_~data~0 (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse9 (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_10))) (store .cse9 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse9) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse8 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse8 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse7 (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_9))) (store .cse7 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse7) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse6 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 v_DerPreprocessor_11) c_ULTIMATE.start_node_create_~temp~0.offset ULTIMATE.start_node_create_~data) .cse1 v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset v_DerPreprocessor_7))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4))))))) is different from false [2021-10-13 07:07:53,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1195 treesize of output 1183 [2021-10-13 07:07:53,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5013 treesize of output 4937 [2021-10-13 07:07:53,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:07:53,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502856237] [2021-10-13 07:07:53,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:07:53,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1501232101] [2021-10-13 07:07:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:53,133 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:07:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:07:53,138 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:07:53,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:07:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:54,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 07:07:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:07:54,755 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 [2021-10-13 07:07:55,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:07:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:56,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:07:57,121 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:07:57,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-13 07:07:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:57,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:07:57,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:57,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 56 [2021-10-13 07:07:57,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:57,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2021-10-13 07:07:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:58,308 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-13 07:07:58,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2021-10-13 07:07:58,364 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:07:58,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-10-13 07:07:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:58,410 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:07:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 40 [2021-10-13 07:08:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:00,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:00,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:00,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 30 [2021-10-13 07:08:00,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:08:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:00,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:00,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 59 [2021-10-13 07:08:00,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:08:00,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2021-10-13 07:08:01,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:01,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-10-13 07:08:01,650 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-10-13 07:08:01,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2021-10-13 07:08:01,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:01,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 77 [2021-10-13 07:08:03,425 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 07:08:03,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 57 [2021-10-13 07:08:03,447 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-10-13 07:08:03,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2021-10-13 07:08:04,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-13 07:08:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:08:04,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:04,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:04,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-13 07:08:04,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:04,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-10-13 07:08:06,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:06,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 368 [2021-10-13 07:08:06,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:06,804 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 417 [2021-10-13 07:08:08,913 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_node_create_~data (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= c_ULTIMATE.start_main_~data~0 (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse9 (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_15))) (store .cse9 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse9) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse8 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse8 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse7 (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_14))) (store .cse7 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse7) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse6 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse4 (bvadd (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|) (_ bv4 32)))) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset ULTIMATE.start_node_create_~data) .cse1 v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset v_DerPreprocessor_7))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4))))))) is different from false [2021-10-13 07:08:08,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:08:08,997 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 547 [2021-10-13 07:08:11,351 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_node_create_~data (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32)) (v_DerPreprocessor_16 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse9 (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_15))) (store .cse9 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse9) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse8 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse8 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse7 (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_14))) (store .cse7 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse7) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse6 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 v_DerPreprocessor_16) c_ULTIMATE.start_node_create_~temp~0.offset ULTIMATE.start_node_create_~data) .cse1 v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset v_DerPreprocessor_7))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-10-13 07:08:11,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 667 treesize of output 659 [2021-10-13 07:08:11,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2785 treesize of output 2741 [2021-10-13 07:09:48,641 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:09:48,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 295 [2021-10-13 07:10:58,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314034 treesize of output 314026 [2021-10-13 07:11:00,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:11:00,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710635931] [2021-10-13 07:11:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:11:00,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:11:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:11:00,801 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:11:00,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:11:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:11:01,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 07:11:01,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:11:02,560 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 [2021-10-13 07:11:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:11:04,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:04,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-13 07:11:05,564 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:11:05,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-10-13 07:11:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:11:06,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:06,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 56 [2021-10-13 07:11:06,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2021-10-13 07:11:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:06,933 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-13 07:11:06,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2021-10-13 07:11:06,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:07,000 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:11:07,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 51 [2021-10-13 07:11:07,035 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 07:11:07,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2021-10-13 07:11:09,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:09,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:09,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:09,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 30 [2021-10-13 07:11:09,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 07:11:09,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:09,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:09,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 59 [2021-10-13 07:11:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:11:09,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 49 [2021-10-13 07:11:10,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:10,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-10-13 07:11:10,329 INFO L354 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2021-10-13 07:11:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 89 [2021-10-13 07:11:10,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:10,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 77 [2021-10-13 07:11:12,154 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 07:11:12,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 57 [2021-10-13 07:11:12,176 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-10-13 07:11:12,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2021-10-13 07:11:13,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-10-13 07:11:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:11:13,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:11:13,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:13,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-13 07:11:14,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:14,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-10-13 07:11:15,851 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:15,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 368 [2021-10-13 07:11:15,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:15,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 417 [2021-10-13 07:11:17,994 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_node_create_~data (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse9 (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_21))) (store .cse9 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse9) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse8 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse8 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse7 (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_20))) (store .cse7 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse7) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse6 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset ULTIMATE.start_node_create_~data) .cse1 v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset v_DerPreprocessor_7))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-10-13 07:11:18,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:11:18,097 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 547 [2021-10-13 07:11:20,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_node_create_~data (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (v_DerPreprocessor_22 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (let ((.cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse5 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse9 (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_21))) (store .cse9 .cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base .cse9) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse8 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse8 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.offset)))) (.cse2 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (let ((.cse7 (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_20))) (store .cse7 .cse1 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base .cse7) c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset)))))) (store .cse6 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset c_ULTIMATE.start_node_create_~temp~0.base))))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 v_DerPreprocessor_22) c_ULTIMATE.start_node_create_~temp~0.offset ULTIMATE.start_node_create_~data) .cse1 v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_sll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_sll_prepend_~head.base) c_ULTIMATE.start_sll_prepend_~head.offset v_DerPreprocessor_7))) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4))))) c_ULTIMATE.start_main_~data~0)) is different from false [2021-10-13 07:11:20,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1195 treesize of output 1183 [2021-10-13 07:11:20,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5013 treesize of output 4937 [2021-10-13 07:11:20,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:11:20,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:11:20,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:11:20,537 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:11:20,537 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:11:20,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:11:20,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:11:20,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:11:20,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:11:20,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:11:20,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:11:20,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:11:20,548 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:11:20,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:11:20,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:11:20,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:11:20,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:11:20,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:11:20,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:11:20,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:11:20,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:11:20,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:11:20,550 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:11:20,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:11:20,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 07:11:20,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 07:11:20,551 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 07:11:20,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 07:11:20,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-13 07:11:20,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-13 07:11:20,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-13 07:11:20,552 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-13 07:11:20,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-13 07:11:20,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-13 07:11:20,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-13 07:11:20,553 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-13 07:11:20,554 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:11:20,554 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:11:20,554 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:11:20,554 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:11:20,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:11:20,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 07:11:20,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-13 07:11:21,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:11:21,166 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:11:21,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:11:21 BoogieIcfgContainer [2021-10-13 07:11:21,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:11:21,196 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:11:21,196 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:11:21,196 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:11:21,197 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:59:11" (3/4) ... [2021-10-13 07:11:21,199 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:11:21,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:11:21,200 INFO L168 Benchmark]: Toolchain (without parser) took 731391.97 ms. Allocated memory was 60.8 MB in the beginning and 383.8 MB in the end (delta: 323.0 MB). Free memory was 37.5 MB in the beginning and 285.3 MB in the end (delta: -247.9 MB). Peak memory consumption was 73.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:21,201 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 60.8 MB. Free memory was 40.9 MB in the beginning and 40.9 MB in the end (delta: 44.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:11:21,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 623.23 ms. Allocated memory is still 60.8 MB. Free memory was 37.3 MB in the beginning and 35.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:21,202 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.08 ms. Allocated memory is still 60.8 MB. Free memory was 35.9 MB in the beginning and 33.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:21,202 INFO L168 Benchmark]: Boogie Preprocessor took 96.72 ms. Allocated memory is still 60.8 MB. Free memory was 33.6 MB in the beginning and 31.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:21,202 INFO L168 Benchmark]: RCFGBuilder took 926.83 ms. Allocated memory is still 60.8 MB. Free memory was 31.7 MB in the beginning and 30.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:21,203 INFO L168 Benchmark]: TraceAbstraction took 729649.19 ms. Allocated memory was 60.8 MB in the beginning and 383.8 MB in the end (delta: 323.0 MB). Free memory was 29.7 MB in the beginning and 285.3 MB in the end (delta: -255.6 MB). Peak memory consumption was 67.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:11:21,203 INFO L168 Benchmark]: Witness Printer took 3.69 ms. Allocated memory is still 383.8 MB. Free memory is still 285.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:11:21,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 60.8 MB. Free memory was 40.9 MB in the beginning and 40.9 MB in the end (delta: 44.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 623.23 ms. Allocated memory is still 60.8 MB. Free memory was 37.3 MB in the beginning and 35.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.08 ms. Allocated memory is still 60.8 MB. Free memory was 35.9 MB in the beginning and 33.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 96.72 ms. Allocated memory is still 60.8 MB. Free memory was 33.6 MB in the beginning and 31.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 926.83 ms. Allocated memory is still 60.8 MB. Free memory was 31.7 MB in the beginning and 30.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 729649.19 ms. Allocated memory was 60.8 MB in the beginning and 383.8 MB in the end (delta: 323.0 MB). Free memory was 29.7 MB in the beginning and 285.3 MB in the end (delta: -255.6 MB). Peak memory consumption was 67.9 MB. Max. memory is 16.1 GB. * Witness Printer took 3.69 ms. Allocated memory is still 383.8 MB. Free memory is still 285.3 MB. There was no memory consumed. 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 - UnprovableResult [Line: 629]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: unable to decide satisfiability of path constraint, overapproximation of memtrack at line 629. Possible FailurePath: [L605] const int len = 2; [L606] const int data = 1; [L607] SLL s = sll_create(len, data); [L584] SLL head = ((void *)0); [L585] COND TRUE len > 0 [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L586] SLL new_head = node_create(data); [L587] new_head->next = head [L588] head = new_head [L585] len-- [L585] COND TRUE len > 0 [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L586] SLL new_head = node_create(data); [L587] new_head->next = head [L588] head = new_head [L585] len-- [L585] COND FALSE !(len > 0) [L590] return head; [L607] SLL s = sll_create(len, data); [L608] const int uneq = 5; [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L600] SLL new_head = node_create(data); [L601] EXPR \read(*head) [L601] new_head->next = *head [L602] *head = new_head [L610] EXPR \read(s) [L610] SLL ptr = s; [L611] EXPR ptr->data [L611] COND FALSE !(uneq != ptr->data) [L614] EXPR ptr->next [L614] ptr = ptr->next [L615] int count = 1; [L616] COND TRUE \read(ptr) [L617] EXPR ptr->next [L617] SLL temp = ptr->next; [L618] EXPR ptr->data [L618] COND TRUE data != ptr->data [L629] reach_error() - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 611]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 611]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 617]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 617]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 604]: 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, 84 locations, 35 error locations. Started 1 CEGAR loops. OverallTime: 729552.4ms, OverallIterations: 16, TraceHistogramMax: 2, EmptinessCheckTime: 30.3ms, AutomataDifference: 82313.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 656 SDtfs, 3043 SDslu, 1749 SDs, 0 SdLazy, 3125 SolverSat, 230 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 33168.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 821 GetRequests, 543 SyntacticMatches, 18 SemanticMatches, 260 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 261544.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=0, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 130.4ms AutomataMinimizationTime, 15 MinimizatonAttempts, 281 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 212.6ms SsaConstructionTime, 2048.4ms SatisfiabilityAnalysisTime, 408948.1ms InterpolantComputationTime, 385 NumberOfCodeBlocks, 385 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 740 ConstructedInterpolants, 212 QuantifiedInterpolants, 19471 SizeOfPredicates, 181 NumberOfNonLiveVariables, 2017 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 30 InterpolantComputations, 26 PerfectInterpolantSequences, 179/220 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 could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:11:21,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_050d3e43-f069-4105-9353-7b8100198592/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...