./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a59be100f0df5b45ec217b714193edff4cbaee7a030bd6a056d7c0737b59e84e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:41:58,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:41:58,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:41:58,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:41:58,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:41:58,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:41:58,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:41:58,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:41:58,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:41:58,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:41:58,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:41:58,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:41:58,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:41:58,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:41:58,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:41:58,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:41:58,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:41:58,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:41:58,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:41:58,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:41:58,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:41:58,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:41:58,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:41:58,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:41:58,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:41:58,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:41:58,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:41:58,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:41:58,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:41:58,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:41:58,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:41:58,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:41:58,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:41:58,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:41:58,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:41:58,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:41:58,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:41:58,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:41:58,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:41:58,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:41:58,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:41:58,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:41:58,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:41:58,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:41:58,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:41:58,647 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:41:58,647 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:41:58,648 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:41:58,648 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:41:58,648 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:41:58,648 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:41:58,648 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:41:58,648 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:41:58,649 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:41:58,649 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:41:58,649 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:41:58,649 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:41:58,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:41:58,650 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:41:58,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:41:58,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:41:58,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:41:58,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:41:58,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:41:58,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:41:58,651 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:41:58,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:41:58,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:41:58,652 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:41:58,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:41:58,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:41:58,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:41:58,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:41:58,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:41:58,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:41:58,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:41:58,653 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:41:58,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:41:58,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:41:58,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:41:58,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:41:58,654 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_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a59be100f0df5b45ec217b714193edff4cbaee7a030bd6a056d7c0737b59e84e [2021-11-07 01:41:58,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:41:58,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:41:58,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:41:58,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:41:58,949 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:41:58,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product29.cil.c [2021-11-07 01:41:59,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data/4b75970a6/07b219a81c97423fa92e4294720bd3d1/FLAGfd02a2419 [2021-11-07 01:41:59,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:41:59,691 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/sv-benchmarks/c/product-lines/email_spec3_product29.cil.c [2021-11-07 01:41:59,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data/4b75970a6/07b219a81c97423fa92e4294720bd3d1/FLAGfd02a2419 [2021-11-07 01:41:59,930 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data/4b75970a6/07b219a81c97423fa92e4294720bd3d1 [2021-11-07 01:41:59,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:41:59,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:41:59,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:59,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:41:59,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:41:59,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:59" (1/1) ... [2021-11-07 01:41:59,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2e181c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:59, skipping insertion in model container [2021-11-07 01:41:59,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:59" (1/1) ... [2021-11-07 01:41:59,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:00,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:00,618 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_590f0001-1c75-4379-ae2f-060f2989a240/sv-benchmarks/c/product-lines/email_spec3_product29.cil.c[49640,49653] [2021-11-07 01:42:00,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:00,687 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:42:00,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8a658b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:00, skipping insertion in model container [2021-11-07 01:42:00,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:00,688 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:42:00,690 INFO L168 Benchmark]: Toolchain (without parser) took 751.00 ms. Allocated memory is still 121.6 MB. Free memory was 87.7 MB in the beginning and 83.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:00,691 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 83.9 MB. Free memory is still 42.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:42:00,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 746.94 ms. Allocated memory is still 121.6 MB. Free memory was 87.7 MB in the beginning and 83.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:00,693 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 83.9 MB. Free memory is still 42.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 746.94 ms. Allocated memory is still 121.6 MB. Free memory was 87.7 MB in the beginning and 83.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a59be100f0df5b45ec217b714193edff4cbaee7a030bd6a056d7c0737b59e84e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:02,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:02,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:02,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:02,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:02,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:02,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:03,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:03,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:03,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:03,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:03,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:03,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:03,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:03,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:03,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:03,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:03,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:03,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:03,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:03,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:03,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:03,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:03,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:03,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:03,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:03,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:03,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:03,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:03,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:03,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:03,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:03,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:03,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:03,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:03,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:03,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:03,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:03,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:03,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:03,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:03,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:42:03,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:03,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:03,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:03,071 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:03,071 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:03,072 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:03,072 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:03,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:03,072 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:03,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:03,073 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:03,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:03,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:03,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:03,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:03,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:03,074 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:03,074 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:42:03,075 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:42:03,075 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:03,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:03,075 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:03,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:03,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:03,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:42:03,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:03,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:03,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:03,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:03,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:03,077 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:42:03,077 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:03,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:03,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:03,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:03,077 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_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a59be100f0df5b45ec217b714193edff4cbaee7a030bd6a056d7c0737b59e84e [2021-11-07 01:42:03,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:03,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:03,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:03,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:03,563 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:03,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product29.cil.c [2021-11-07 01:42:03,651 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data/144a20a8e/71c94cb6464640a9a3d510602f83ceab/FLAGee35e3dbb [2021-11-07 01:42:04,393 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:04,394 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/sv-benchmarks/c/product-lines/email_spec3_product29.cil.c [2021-11-07 01:42:04,427 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data/144a20a8e/71c94cb6464640a9a3d510602f83ceab/FLAGee35e3dbb [2021-11-07 01:42:04,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/data/144a20a8e/71c94cb6464640a9a3d510602f83ceab [2021-11-07 01:42:04,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:04,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:04,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:04,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:04,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:04,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:04" (1/1) ... [2021-11-07 01:42:04,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f09bae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:04, skipping insertion in model container [2021-11-07 01:42:04,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:04" (1/1) ... [2021-11-07 01:42:04,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:04,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:05,444 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_590f0001-1c75-4379-ae2f-060f2989a240/sv-benchmarks/c/product-lines/email_spec3_product29.cil.c[49640,49653] [2021-11-07 01:42:05,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:05,564 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:42:05,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:05,701 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_590f0001-1c75-4379-ae2f-060f2989a240/sv-benchmarks/c/product-lines/email_spec3_product29.cil.c[49640,49653] [2021-11-07 01:42:05,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:05,733 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:42:05,795 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_590f0001-1c75-4379-ae2f-060f2989a240/sv-benchmarks/c/product-lines/email_spec3_product29.cil.c[49640,49653] [2021-11-07 01:42:05,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:05,866 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:42:05,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05 WrapperNode [2021-11-07 01:42:05,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:05,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:05,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:42:05,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:42:05,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:05,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:06,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:42:06,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:42:06,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:42:06,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:42:06,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:42:06,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:42:06,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:42:06,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (1/1) ... [2021-11-07 01:42:06,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:06,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:06,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:42:06,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:42:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:42:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:42:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:42:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:42:06,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:42:13,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:42:13,409 INFO L299 CfgBuilder]: Removed 665 assume(true) statements. [2021-11-07 01:42:13,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:13 BoogieIcfgContainer [2021-11-07 01:42:13,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:42:13,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:42:13,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:42:13,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:42:13,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:04" (1/3) ... [2021-11-07 01:42:13,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db8f4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:13, skipping insertion in model container [2021-11-07 01:42:13,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:05" (2/3) ... [2021-11-07 01:42:13,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db8f4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:13, skipping insertion in model container [2021-11-07 01:42:13,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:13" (3/3) ... [2021-11-07 01:42:13,425 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product29.cil.c [2021-11-07 01:42:13,431 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:42:13,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-07 01:42:13,518 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:42:13,529 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:42:13,530 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-07 01:42:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 1118 states, 1105 states have (on average 1.7656108597285067) internal successors, (1951), 1117 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:42:13,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:13,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:13,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:13,670 INFO L85 PathProgramCache]: Analyzing trace with hash 263713345, now seen corresponding path program 1 times [2021-11-07 01:42:13,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:13,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535362897] [2021-11-07 01:42:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:13,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:13,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:13,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:13,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:42:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:42:14,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:14,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:14,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:14,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535362897] [2021-11-07 01:42:14,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535362897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:14,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:14,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:42:14,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776967740] [2021-11-07 01:42:14,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:42:14,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:14,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:42:14,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:42:14,825 INFO L87 Difference]: Start difference. First operand has 1118 states, 1105 states have (on average 1.7656108597285067) internal successors, (1951), 1117 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 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) [2021-11-07 01:42:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:14,933 INFO L93 Difference]: Finished difference Result 1955 states and 3386 transitions. [2021-11-07 01:42:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:42:14,935 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 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) Word has length 60 [2021-11-07 01:42:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:14,961 INFO L225 Difference]: With dead ends: 1955 [2021-11-07 01:42:14,961 INFO L226 Difference]: Without dead ends: 1040 [2021-11-07 01:42:14,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:42:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-07 01:42:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1040. [2021-11-07 01:42:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1028 states have (on average 1.7529182879377432) internal successors, (1802), 1039 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1802 transitions. [2021-11-07 01:42:15,079 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1802 transitions. Word has length 60 [2021-11-07 01:42:15,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:15,080 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1802 transitions. [2021-11-07 01:42:15,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 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) [2021-11-07 01:42:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1802 transitions. [2021-11-07 01:42:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:42:15,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:15,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:15,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:15,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:15,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1464033042, now seen corresponding path program 1 times [2021-11-07 01:42:15,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:15,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60838390] [2021-11-07 01:42:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:15,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:15,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:15,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:42:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:15,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:42:15,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:16,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:16,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:16,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60838390] [2021-11-07 01:42:16,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60838390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:16,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:16,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:16,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375952390] [2021-11-07 01:42:16,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:16,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:16,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:16,231 INFO L87 Difference]: Start difference. First operand 1040 states and 1802 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:16,416 INFO L93 Difference]: Finished difference Result 3090 states and 5358 transitions. [2021-11-07 01:42:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:42:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:16,431 INFO L225 Difference]: With dead ends: 3090 [2021-11-07 01:42:16,432 INFO L226 Difference]: Without dead ends: 2065 [2021-11-07 01:42:16,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-11-07 01:42:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1039. [2021-11-07 01:42:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1027 states have (on average 1.7497565725413826) internal successors, (1797), 1038 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1797 transitions. [2021-11-07 01:42:16,529 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1797 transitions. Word has length 61 [2021-11-07 01:42:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:16,529 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1797 transitions. [2021-11-07 01:42:16,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1797 transitions. [2021-11-07 01:42:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:42:16,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:16,532 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:16,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:16,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:16,748 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2137040044, now seen corresponding path program 1 times [2021-11-07 01:42:16,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:16,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260357773] [2021-11-07 01:42:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:16,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:16,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:16,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:42:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:42:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:17,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:17,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:17,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260357773] [2021-11-07 01:42:17,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260357773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:17,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:17,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:17,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920344311] [2021-11-07 01:42:17,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:17,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:17,674 INFO L87 Difference]: Start difference. First operand 1039 states and 1797 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:18,086 INFO L93 Difference]: Finished difference Result 4073 states and 7050 transitions. [2021-11-07 01:42:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:18,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:42:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:18,111 INFO L225 Difference]: With dead ends: 4073 [2021-11-07 01:42:18,111 INFO L226 Difference]: Without dead ends: 3052 [2021-11-07 01:42:18,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:42:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-11-07 01:42:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1038. [2021-11-07 01:42:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1026 states have (on average 1.7475633528265107) internal successors, (1793), 1037 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1793 transitions. [2021-11-07 01:42:18,199 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1793 transitions. Word has length 63 [2021-11-07 01:42:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:18,199 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1793 transitions. [2021-11-07 01:42:18,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1793 transitions. [2021-11-07 01:42:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:42:18,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:18,204 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:18,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:18,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:18,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1699957351, now seen corresponding path program 1 times [2021-11-07 01:42:18,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:18,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789412745] [2021-11-07 01:42:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:18,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:18,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:18,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:18,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:42:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:42:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:19,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:19,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:19,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789412745] [2021-11-07 01:42:19,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789412745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:19,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:19,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:19,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969941282] [2021-11-07 01:42:19,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:19,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:19,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:19,355 INFO L87 Difference]: Start difference. First operand 1038 states and 1793 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:19,460 INFO L93 Difference]: Finished difference Result 2073 states and 3583 transitions. [2021-11-07 01:42:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:42:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:19,469 INFO L225 Difference]: With dead ends: 2073 [2021-11-07 01:42:19,469 INFO L226 Difference]: Without dead ends: 1043 [2021-11-07 01:42:19,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-07 01:42:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1038. [2021-11-07 01:42:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1026 states have (on average 1.7446393762183237) internal successors, (1790), 1037 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1790 transitions. [2021-11-07 01:42:19,542 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1790 transitions. Word has length 64 [2021-11-07 01:42:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:19,544 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1790 transitions. [2021-11-07 01:42:19,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1790 transitions. [2021-11-07 01:42:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:42:19,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:19,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:19,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:19,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:19,770 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:19,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2036054588, now seen corresponding path program 1 times [2021-11-07 01:42:19,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:19,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516498337] [2021-11-07 01:42:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:19,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:19,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:19,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:19,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:42:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:42:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:20,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:20,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:20,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516498337] [2021-11-07 01:42:20,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516498337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:20,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:20,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:20,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803902005] [2021-11-07 01:42:20,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:20,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:20,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:20,740 INFO L87 Difference]: Start difference. First operand 1038 states and 1790 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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) [2021-11-07 01:42:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:21,150 INFO L93 Difference]: Finished difference Result 4060 states and 7026 transitions. [2021-11-07 01:42:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:21,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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) Word has length 65 [2021-11-07 01:42:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:21,170 INFO L225 Difference]: With dead ends: 4060 [2021-11-07 01:42:21,171 INFO L226 Difference]: Without dead ends: 3048 [2021-11-07 01:42:21,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:42:21,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2021-11-07 01:42:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 1038. [2021-11-07 01:42:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1026 states have (on average 1.7417153996101364) internal successors, (1787), 1037 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1787 transitions. [2021-11-07 01:42:21,291 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1787 transitions. Word has length 65 [2021-11-07 01:42:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:21,292 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1787 transitions. [2021-11-07 01:42:21,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 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) [2021-11-07 01:42:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1787 transitions. [2021-11-07 01:42:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:42:21,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:21,294 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:21,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:21,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:21,509 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2046416201, now seen corresponding path program 1 times [2021-11-07 01:42:21,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:21,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562123454] [2021-11-07 01:42:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:21,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:21,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:21,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:21,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:42:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:22,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:22,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:22,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:22,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562123454] [2021-11-07 01:42:22,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562123454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:22,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:22,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:22,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865861117] [2021-11-07 01:42:22,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:22,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:22,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:22,363 INFO L87 Difference]: Start difference. First operand 1038 states and 1787 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:22,555 INFO L93 Difference]: Finished difference Result 2809 states and 4833 transitions. [2021-11-07 01:42:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:22,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:42:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:22,569 INFO L225 Difference]: With dead ends: 2809 [2021-11-07 01:42:22,570 INFO L226 Difference]: Without dead ends: 2050 [2021-11-07 01:42:22,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-11-07 01:42:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1291. [2021-11-07 01:42:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1279 states have (on average 1.761532447224394) internal successors, (2253), 1290 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 2253 transitions. [2021-11-07 01:42:22,681 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 2253 transitions. Word has length 67 [2021-11-07 01:42:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:22,682 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 2253 transitions. [2021-11-07 01:42:22,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:22,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 2253 transitions. [2021-11-07 01:42:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:42:22,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:22,685 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:22,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:22,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:22,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash 837677672, now seen corresponding path program 1 times [2021-11-07 01:42:22,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:22,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810430625] [2021-11-07 01:42:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:22,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:22,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:22,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:22,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:42:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:23,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:23,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:23,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:23,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810430625] [2021-11-07 01:42:23,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810430625] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:23,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:23,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:23,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010747623] [2021-11-07 01:42:23,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:23,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:23,901 INFO L87 Difference]: Start difference. First operand 1291 states and 2253 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:24,097 INFO L93 Difference]: Finished difference Result 3458 states and 6032 transitions. [2021-11-07 01:42:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:24,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-07 01:42:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:24,112 INFO L225 Difference]: With dead ends: 3458 [2021-11-07 01:42:24,112 INFO L226 Difference]: Without dead ends: 2251 [2021-11-07 01:42:24,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-11-07 01:42:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1492. [2021-11-07 01:42:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1480 states have (on average 1.7716216216216216) internal successors, (2622), 1491 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2622 transitions. [2021-11-07 01:42:24,241 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2622 transitions. Word has length 79 [2021-11-07 01:42:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:24,243 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 2622 transitions. [2021-11-07 01:42:24,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2622 transitions. [2021-11-07 01:42:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:42:24,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:24,253 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:24,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:42:24,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:24,475 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash -791383993, now seen corresponding path program 1 times [2021-11-07 01:42:24,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:24,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870537207] [2021-11-07 01:42:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:24,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:24,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:24,487 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:24,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:42:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:25,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:25,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:25,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:25,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:25,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870537207] [2021-11-07 01:42:25,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870537207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:25,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:25,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:25,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465630051] [2021-11-07 01:42:25,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:25,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:25,541 INFO L87 Difference]: Start difference. First operand 1492 states and 2622 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-11-07 01:42:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:25,738 INFO L93 Difference]: Finished difference Result 4105 states and 7225 transitions. [2021-11-07 01:42:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:42:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:25,759 INFO L225 Difference]: With dead ends: 4105 [2021-11-07 01:42:25,759 INFO L226 Difference]: Without dead ends: 2701 [2021-11-07 01:42:25,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-07 01:42:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1942. [2021-11-07 01:42:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1930 states have (on average 1.7875647668393781) internal successors, (3450), 1941 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3450 transitions. [2021-11-07 01:42:25,949 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3450 transitions. Word has length 80 [2021-11-07 01:42:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:25,950 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 3450 transitions. [2021-11-07 01:42:25,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-11-07 01:42:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3450 transitions. [2021-11-07 01:42:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:42:25,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:25,955 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:25,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:26,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:26,176 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:26,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1913364457, now seen corresponding path program 1 times [2021-11-07 01:42:26,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:26,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447536521] [2021-11-07 01:42:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:26,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:26,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:26,181 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:26,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:42:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:26,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:27,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:27,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:27,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447536521] [2021-11-07 01:42:27,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447536521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:27,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:27,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:27,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030430288] [2021-11-07 01:42:27,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:27,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:27,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:27,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:27,252 INFO L87 Difference]: Start difference. First operand 1942 states and 3450 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:27,478 INFO L93 Difference]: Finished difference Result 4358 states and 7688 transitions. [2021-11-07 01:42:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 81 [2021-11-07 01:42:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:27,498 INFO L225 Difference]: With dead ends: 4358 [2021-11-07 01:42:27,499 INFO L226 Difference]: Without dead ends: 2701 [2021-11-07 01:42:27,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-07 01:42:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1942. [2021-11-07 01:42:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1930 states have (on average 1.7865284974093265) internal successors, (3448), 1941 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3448 transitions. [2021-11-07 01:42:27,662 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3448 transitions. Word has length 81 [2021-11-07 01:42:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:27,663 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 3448 transitions. [2021-11-07 01:42:27,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3448 transitions. [2021-11-07 01:42:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:42:27,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:27,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:27,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:27,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:27,884 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1441038998, now seen corresponding path program 1 times [2021-11-07 01:42:27,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:27,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315618818] [2021-11-07 01:42:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:27,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:27,886 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:27,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:42:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:28,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:28,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:28,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315618818] [2021-11-07 01:42:28,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315618818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:28,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:28,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:28,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349235144] [2021-11-07 01:42:28,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:28,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:28,865 INFO L87 Difference]: Start difference. First operand 1942 states and 3448 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:29,137 INFO L93 Difference]: Finished difference Result 5427 states and 9658 transitions. [2021-11-07 01:42:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:42:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:29,181 INFO L225 Difference]: With dead ends: 5427 [2021-11-07 01:42:29,181 INFO L226 Difference]: Without dead ends: 3581 [2021-11-07 01:42:29,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2021-11-07 01:42:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 2822. [2021-11-07 01:42:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2810 states have (on average 1.803202846975089) internal successors, (5067), 2821 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 5067 transitions. [2021-11-07 01:42:29,382 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 5067 transitions. Word has length 81 [2021-11-07 01:42:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:29,382 INFO L470 AbstractCegarLoop]: Abstraction has 2822 states and 5067 transitions. [2021-11-07 01:42:29,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 5067 transitions. [2021-11-07 01:42:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:42:29,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:29,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:29,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:29,603 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash -445879543, now seen corresponding path program 1 times [2021-11-07 01:42:29,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:29,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028510909] [2021-11-07 01:42:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:29,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:29,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:29,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:29,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:42:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:30,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:30,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:30,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:30,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028510909] [2021-11-07 01:42:30,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028510909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:30,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:30,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:30,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027485048] [2021-11-07 01:42:30,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:30,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:30,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:30,578 INFO L87 Difference]: Start difference. First operand 2822 states and 5067 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:30,885 INFO L93 Difference]: Finished difference Result 7803 states and 14034 transitions. [2021-11-07 01:42:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:42:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:30,901 INFO L225 Difference]: With dead ends: 7803 [2021-11-07 01:42:30,901 INFO L226 Difference]: Without dead ends: 5111 [2021-11-07 01:42:30,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5111 states. [2021-11-07 01:42:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5111 to 4352. [2021-11-07 01:42:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4340 states have (on average 1.8156682027649769) internal successors, (7880), 4351 states have internal predecessors, (7880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 7880 transitions. [2021-11-07 01:42:31,273 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 7880 transitions. Word has length 82 [2021-11-07 01:42:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:31,275 INFO L470 AbstractCegarLoop]: Abstraction has 4352 states and 7880 transitions. [2021-11-07 01:42:31,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 7880 transitions. [2021-11-07 01:42:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:42:31,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:31,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:31,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:31,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:31,507 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash 60059943, now seen corresponding path program 1 times [2021-11-07 01:42:31,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:31,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763675334] [2021-11-07 01:42:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:31,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:31,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:31,510 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:31,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:42:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:32,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:32,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:32,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:32,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763675334] [2021-11-07 01:42:32,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763675334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:32,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:32,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:32,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729821529] [2021-11-07 01:42:32,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:32,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:32,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:32,497 INFO L87 Difference]: Start difference. First operand 4352 states and 7880 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:32,835 INFO L93 Difference]: Finished difference Result 12109 states and 21956 transitions. [2021-11-07 01:42:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-07 01:42:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:32,856 INFO L225 Difference]: With dead ends: 12109 [2021-11-07 01:42:32,857 INFO L226 Difference]: Without dead ends: 7921 [2021-11-07 01:42:32,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-11-07 01:42:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 7162. [2021-11-07 01:42:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 7150 states have (on average 1.823916083916084) internal successors, (13041), 7161 states have internal predecessors, (13041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 13041 transitions. [2021-11-07 01:42:33,333 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 13041 transitions. Word has length 83 [2021-11-07 01:42:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:33,334 INFO L470 AbstractCegarLoop]: Abstraction has 7162 states and 13041 transitions. [2021-11-07 01:42:33,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 13041 transitions. [2021-11-07 01:42:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:42:33,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:33,345 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:33,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:33,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:33,561 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash -187804309, now seen corresponding path program 1 times [2021-11-07 01:42:33,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:33,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241383443] [2021-11-07 01:42:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:33,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:33,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:33,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:33,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:42:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:34,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:42:34,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:42:34,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:34,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241383443] [2021-11-07 01:42:34,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241383443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:34,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:34,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:34,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109125800] [2021-11-07 01:42:34,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:34,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:34,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:34,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:34,694 INFO L87 Difference]: Start difference. First operand 7162 states and 13041 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:38,073 INFO L93 Difference]: Finished difference Result 27171 states and 49520 transitions. [2021-11-07 01:42:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:42:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:38,123 INFO L225 Difference]: With dead ends: 27171 [2021-11-07 01:42:38,123 INFO L226 Difference]: Without dead ends: 20292 [2021-11-07 01:42:38,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:42:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20292 states. [2021-11-07 01:42:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20292 to 7112. [2021-11-07 01:42:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7112 states, 7100 states have (on average 1.8085915492957747) internal successors, (12841), 7111 states have internal predecessors, (12841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 12841 transitions. [2021-11-07 01:42:38,798 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 12841 transitions. Word has length 84 [2021-11-07 01:42:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:38,799 INFO L470 AbstractCegarLoop]: Abstraction has 7112 states and 12841 transitions. [2021-11-07 01:42:38,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 12841 transitions. [2021-11-07 01:42:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:42:38,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:38,815 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:38,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:39,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:39,039 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1748289466, now seen corresponding path program 1 times [2021-11-07 01:42:39,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:39,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433568867] [2021-11-07 01:42:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:39,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:39,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:39,042 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:39,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:42:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:39,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:39,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:40,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:40,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:40,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433568867] [2021-11-07 01:42:40,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433568867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:40,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:40,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:40,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866857633] [2021-11-07 01:42:40,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:40,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:40,202 INFO L87 Difference]: Start difference. First operand 7112 states and 12841 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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) [2021-11-07 01:42:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:40,856 INFO L93 Difference]: Finished difference Result 20850 states and 37693 transitions. [2021-11-07 01:42:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:40,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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) Word has length 84 [2021-11-07 01:42:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:40,887 INFO L225 Difference]: With dead ends: 20850 [2021-11-07 01:42:40,887 INFO L226 Difference]: Without dead ends: 13905 [2021-11-07 01:42:40,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13905 states. [2021-11-07 01:42:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13905 to 13146. [2021-11-07 01:42:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13146 states, 13134 states have (on average 1.812243033348561) internal successors, (23802), 13145 states have internal predecessors, (23802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13146 states to 13146 states and 23802 transitions. [2021-11-07 01:42:41,793 INFO L78 Accepts]: Start accepts. Automaton has 13146 states and 23802 transitions. Word has length 84 [2021-11-07 01:42:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:41,794 INFO L470 AbstractCegarLoop]: Abstraction has 13146 states and 23802 transitions. [2021-11-07 01:42:41,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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) [2021-11-07 01:42:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 13146 states and 23802 transitions. [2021-11-07 01:42:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:42:41,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:41,809 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:41,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:42,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:42,023 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:42,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:42,023 INFO L85 PathProgramCache]: Analyzing trace with hash 783559654, now seen corresponding path program 1 times [2021-11-07 01:42:42,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:42,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016668933] [2021-11-07 01:42:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:42,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:42,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:42,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:42,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:42:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:42,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:42,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:42,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:43,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:43,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016668933] [2021-11-07 01:42:43,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016668933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:43,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659378953] [2021-11-07 01:42:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:43,278 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:43,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:43,287 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:43,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:42:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:42:44,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:44,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:44,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659378953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:44,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:44,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:42:44,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481521824] [2021-11-07 01:42:44,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:42:44,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:42:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:42:44,962 INFO L87 Difference]: Start difference. First operand 13146 states and 23802 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:53,245 INFO L93 Difference]: Finished difference Result 88342 states and 159311 transitions. [2021-11-07 01:42:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:42:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:42:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:53,406 INFO L225 Difference]: With dead ends: 88342 [2021-11-07 01:42:53,406 INFO L226 Difference]: Without dead ends: 87601 [2021-11-07 01:42:53,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:42:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87601 states. [2021-11-07 01:42:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87601 to 25937. [2021-11-07 01:42:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25937 states, 25925 states have (on average 1.813539054966249) internal successors, (47016), 25936 states have internal predecessors, (47016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25937 states to 25937 states and 47016 transitions. [2021-11-07 01:42:56,048 INFO L78 Accepts]: Start accepts. Automaton has 25937 states and 47016 transitions. Word has length 85 [2021-11-07 01:42:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:56,049 INFO L470 AbstractCegarLoop]: Abstraction has 25937 states and 47016 transitions. [2021-11-07 01:42:56,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 25937 states and 47016 transitions. [2021-11-07 01:42:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:42:56,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:56,085 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:56,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:56,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:42:56,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:56,503 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:42:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:56,504 INFO L85 PathProgramCache]: Analyzing trace with hash -391169239, now seen corresponding path program 1 times [2021-11-07 01:42:56,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:56,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945358794] [2021-11-07 01:42:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:56,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:56,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:56,506 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:56,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:42:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:57,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:57,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:57,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:57,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:57,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945358794] [2021-11-07 01:42:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945358794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:57,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [341015645] [2021-11-07 01:42:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:57,915 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:57,915 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:57,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:42:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:59,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:42:59,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:59,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:59,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [341015645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:59,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:59,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:42:59,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824754734] [2021-11-07 01:42:59,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:42:59,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:42:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:42:59,825 INFO L87 Difference]: Start difference. First operand 25937 states and 47016 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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) [2021-11-07 01:43:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:03,251 INFO L93 Difference]: Finished difference Result 28002 states and 50535 transitions. [2021-11-07 01:43:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:43:03,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:43:03,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:03,291 INFO L225 Difference]: With dead ends: 28002 [2021-11-07 01:43:03,294 INFO L226 Difference]: Without dead ends: 26847 [2021-11-07 01:43:03,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:43:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26847 states. [2021-11-07 01:43:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26847 to 25931. [2021-11-07 01:43:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25931 states, 25919 states have (on average 1.8134573093097728) internal successors, (47003), 25930 states have internal predecessors, (47003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25931 states to 25931 states and 47003 transitions. [2021-11-07 01:43:05,080 INFO L78 Accepts]: Start accepts. Automaton has 25931 states and 47003 transitions. Word has length 86 [2021-11-07 01:43:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:05,080 INFO L470 AbstractCegarLoop]: Abstraction has 25931 states and 47003 transitions. [2021-11-07 01:43:05,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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) [2021-11-07 01:43:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 25931 states and 47003 transitions. [2021-11-07 01:43:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:43:05,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:05,125 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:05,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:43:05,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:43:05,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:05,532 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:43:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1678621223, now seen corresponding path program 1 times [2021-11-07 01:43:05,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:05,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889733986] [2021-11-07 01:43:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:05,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:05,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:05,535 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:05,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:43:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:06,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:06,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:06,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889733986] [2021-11-07 01:43:06,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889733986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:06,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:06,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:43:06,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654814857] [2021-11-07 01:43:06,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:06,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:06,932 INFO L87 Difference]: Start difference. First operand 25931 states and 47003 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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) [2021-11-07 01:43:08,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:08,591 INFO L93 Difference]: Finished difference Result 51167 states and 92939 transitions. [2021-11-07 01:43:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:08,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:43:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:08,635 INFO L225 Difference]: With dead ends: 51167 [2021-11-07 01:43:08,635 INFO L226 Difference]: Without dead ends: 25522 [2021-11-07 01:43:08,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25522 states. [2021-11-07 01:43:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25522 to 13144. [2021-11-07 01:43:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13144 states, 13132 states have (on average 1.8118336886993602) internal successors, (23793), 13143 states have internal predecessors, (23793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13144 states to 13144 states and 23793 transitions. [2021-11-07 01:43:09,729 INFO L78 Accepts]: Start accepts. Automaton has 13144 states and 23793 transitions. Word has length 86 [2021-11-07 01:43:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:09,730 INFO L470 AbstractCegarLoop]: Abstraction has 13144 states and 23793 transitions. [2021-11-07 01:43:09,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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) [2021-11-07 01:43:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 13144 states and 23793 transitions. [2021-11-07 01:43:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:43:09,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:09,746 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:09,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:09,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:09,947 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:43:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash -918663017, now seen corresponding path program 1 times [2021-11-07 01:43:09,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:09,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642359572] [2021-11-07 01:43:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:09,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:09,950 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:09,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:43:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:10,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:11,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:11,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:11,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642359572] [2021-11-07 01:43:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642359572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:11,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1443658607] [2021-11-07 01:43:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:11,357 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:11,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:11,358 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:11,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:43:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:12,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:43:12,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:13,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1443658607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:14,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:43:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:43:14,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833167580] [2021-11-07 01:43:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:43:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:14,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:43:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:43:14,059 INFO L87 Difference]: Start difference. First operand 13144 states and 23793 transitions. Second operand has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:37,579 INFO L93 Difference]: Finished difference Result 31816 states and 56694 transitions. [2021-11-07 01:43:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:43:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 01:43:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:37,625 INFO L225 Difference]: With dead ends: 31816 [2021-11-07 01:43:37,625 INFO L226 Difference]: Without dead ends: 31123 [2021-11-07 01:43:37,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:43:37,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31123 states. [2021-11-07 01:43:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31123 to 25922. [2021-11-07 01:43:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25910 states have (on average 1.8133925125434196) internal successors, (46985), 25921 states have internal predecessors, (46985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 46985 transitions. [2021-11-07 01:43:39,168 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 46985 transitions. Word has length 88 [2021-11-07 01:43:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 25922 states and 46985 transitions. [2021-11-07 01:43:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 46985 transitions. [2021-11-07 01:43:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:43:39,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:39,188 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:39,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:39,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:43:39,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:39,595 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:43:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1579099279, now seen corresponding path program 1 times [2021-11-07 01:43:39,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:39,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63622615] [2021-11-07 01:43:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:39,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:39,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:39,597 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:39,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:43:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:40,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:40,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:40,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:41,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:41,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63622615] [2021-11-07 01:43:41,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63622615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:41,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1666747943] [2021-11-07 01:43:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:41,075 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:41,076 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:41,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:43:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:42,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:42,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1666747943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:42,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:43:42,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:43:42,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621839497] [2021-11-07 01:43:42,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:42,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:43:42,772 INFO L87 Difference]: Start difference. First operand 25922 states and 46985 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:44,201 INFO L93 Difference]: Finished difference Result 27312 states and 49334 transitions. [2021-11-07 01:43:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 89 [2021-11-07 01:43:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:44,242 INFO L225 Difference]: With dead ends: 27312 [2021-11-07 01:43:44,242 INFO L226 Difference]: Without dead ends: 26558 [2021-11-07 01:43:44,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:43:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26558 states. [2021-11-07 01:43:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26558 to 25921. [2021-11-07 01:43:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25921 states, 25909 states have (on average 1.8133081168705856) internal successors, (46981), 25920 states have internal predecessors, (46981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25921 states to 25921 states and 46981 transitions. [2021-11-07 01:43:45,737 INFO L78 Accepts]: Start accepts. Automaton has 25921 states and 46981 transitions. Word has length 89 [2021-11-07 01:43:45,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:45,737 INFO L470 AbstractCegarLoop]: Abstraction has 25921 states and 46981 transitions. [2021-11-07 01:43:45,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25921 states and 46981 transitions. [2021-11-07 01:43:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:43:45,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:45,753 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:45,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:45,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:46,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:46,171 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:43:46,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -642547605, now seen corresponding path program 1 times [2021-11-07 01:43:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:46,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723562971] [2021-11-07 01:43:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:46,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:46,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:46,173 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:46,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:43:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:47,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:47,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:47,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:47,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723562971] [2021-11-07 01:43:47,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723562971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:47,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [97196914] [2021-11-07 01:43:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:47,738 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:47,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:47,739 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:47,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:43:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:43:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:49,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:49,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [97196914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:49,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:43:49,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:43:49,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364169657] [2021-11-07 01:43:49,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:43:49,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:43:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:43:49,912 INFO L87 Difference]: Start difference. First operand 25921 states and 46981 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:53,760 INFO L93 Difference]: Finished difference Result 27837 states and 50179 transitions. [2021-11-07 01:43:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:43:53,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 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 89 [2021-11-07 01:43:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:53,803 INFO L225 Difference]: With dead ends: 27837 [2021-11-07 01:43:53,803 INFO L226 Difference]: Without dead ends: 26593 [2021-11-07 01:43:53,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:43:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26593 states. [2021-11-07 01:43:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26593 to 25885. [2021-11-07 01:43:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25885 states, 25873 states have (on average 1.812700498589263) internal successors, (46900), 25884 states have internal predecessors, (46900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25885 states to 25885 states and 46900 transitions. [2021-11-07 01:43:55,386 INFO L78 Accepts]: Start accepts. Automaton has 25885 states and 46900 transitions. Word has length 89 [2021-11-07 01:43:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:55,387 INFO L470 AbstractCegarLoop]: Abstraction has 25885 states and 46900 transitions. [2021-11-07 01:43:55,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25885 states and 46900 transitions. [2021-11-07 01:43:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:43:55,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:55,405 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:55,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:55,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:55,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:55,806 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:43:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1926191251, now seen corresponding path program 1 times [2021-11-07 01:43:55,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:55,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767890171] [2021-11-07 01:43:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:55,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:55,808 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:55,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:43:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:56,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:57,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:57,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:57,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767890171] [2021-11-07 01:43:57,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767890171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:57,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [939506105] [2021-11-07 01:43:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:57,405 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:57,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:57,405 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:57,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:43:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:43:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:43:59,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:44:00,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [939506105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:00,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:00,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:44:00,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85794452] [2021-11-07 01:44:00,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:44:00,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:44:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:44:00,062 INFO L87 Difference]: Start difference. First operand 25885 states and 46900 transitions. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:20,438 INFO L93 Difference]: Finished difference Result 59691 states and 106925 transitions. [2021-11-07 01:44:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:44:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 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 89 [2021-11-07 01:44:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:20,535 INFO L225 Difference]: With dead ends: 59691 [2021-11-07 01:44:20,535 INFO L226 Difference]: Without dead ends: 58483 [2021-11-07 01:44:20,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:44:20,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58483 states. [2021-11-07 01:44:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58483 to 51331. [2021-11-07 01:44:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51331 states, 51319 states have (on average 1.8134998733412577) internal successors, (93067), 51330 states have internal predecessors, (93067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51331 states to 51331 states and 93067 transitions. [2021-11-07 01:44:23,661 INFO L78 Accepts]: Start accepts. Automaton has 51331 states and 93067 transitions. Word has length 89 [2021-11-07 01:44:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:23,662 INFO L470 AbstractCegarLoop]: Abstraction has 51331 states and 93067 transitions. [2021-11-07 01:44:23,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 51331 states and 93067 transitions. [2021-11-07 01:44:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:44:23,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:23,704 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:23,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:23,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:24,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:24,126 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2066739861, now seen corresponding path program 1 times [2021-11-07 01:44:24,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:24,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748527986] [2021-11-07 01:44:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:24,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:24,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:24,129 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:24,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:44:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:25,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:25,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:25,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:25,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748527986] [2021-11-07 01:44:25,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748527986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:25,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [667834561] [2021-11-07 01:44:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:25,871 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:25,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:25,872 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:25,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:44:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:44:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:44:27,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:44:28,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [667834561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:28,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:28,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 01:44:28,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084088233] [2021-11-07 01:44:28,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:44:28,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:44:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:44:28,204 INFO L87 Difference]: Start difference. First operand 51331 states and 93067 transitions. Second operand has 14 states, 14 states have (on average 10.5) internal successors, (147), 14 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:40,215 INFO L93 Difference]: Finished difference Result 69557 states and 123970 transitions. [2021-11-07 01:44:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:44:40,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.5) internal successors, (147), 14 states have internal predecessors, (147), 0 states have call successors, (0), 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 89 [2021-11-07 01:44:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:40,319 INFO L225 Difference]: With dead ends: 69557 [2021-11-07 01:44:40,319 INFO L226 Difference]: Without dead ends: 67493 [2021-11-07 01:44:40,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 01:44:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67493 states. [2021-11-07 01:44:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67493 to 51902. [2021-11-07 01:44:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51902 states, 51890 states have (on average 1.8111967623819618) internal successors, (93983), 51901 states have internal predecessors, (93983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51902 states to 51902 states and 93983 transitions. [2021-11-07 01:44:43,681 INFO L78 Accepts]: Start accepts. Automaton has 51902 states and 93983 transitions. Word has length 89 [2021-11-07 01:44:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:43,682 INFO L470 AbstractCegarLoop]: Abstraction has 51902 states and 93983 transitions. [2021-11-07 01:44:43,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.5) internal successors, (147), 14 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 51902 states and 93983 transitions. [2021-11-07 01:44:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:44:43,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:43,741 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:43,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:43,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:44,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:44,155 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:44:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1718609743, now seen corresponding path program 1 times [2021-11-07 01:44:44,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:44,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431640304] [2021-11-07 01:44:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:44,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:44,157 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:44,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:44:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:45,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:45,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:45,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:45,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431640304] [2021-11-07 01:44:45,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431640304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:45,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1899867365] [2021-11-07 01:44:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:45,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:45,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:45,969 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:45,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:44:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 01:44:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:44:48,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:44:48,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1899867365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:48,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:44:48,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 24 [2021-11-07 01:44:48,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535635486] [2021-11-07 01:44:48,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:44:48,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:44:48,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:44:48,673 INFO L87 Difference]: Start difference. First operand 51902 states and 93983 transitions. Second operand has 18 states, 18 states have (on average 8.666666666666666) internal successors, (156), 18 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:11,285 INFO L93 Difference]: Finished difference Result 80533 states and 141800 transitions. [2021-11-07 01:45:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-11-07 01:45:11,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.666666666666666) internal successors, (156), 18 states have internal predecessors, (156), 0 states have call successors, (0), 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 90 [2021-11-07 01:45:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:11,411 INFO L225 Difference]: With dead ends: 80533 [2021-11-07 01:45:11,412 INFO L226 Difference]: Without dead ends: 78226 [2021-11-07 01:45:11,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8165 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4399, Invalid=19163, Unknown=0, NotChecked=0, Total=23562 [2021-11-07 01:45:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78226 states. [2021-11-07 01:45:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78226 to 52898. [2021-11-07 01:45:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52898 states, 52886 states have (on average 1.8084370154672313) internal successors, (95641), 52897 states have internal predecessors, (95641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52898 states to 52898 states and 95641 transitions. [2021-11-07 01:45:15,650 INFO L78 Accepts]: Start accepts. Automaton has 52898 states and 95641 transitions. Word has length 90 [2021-11-07 01:45:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:15,651 INFO L470 AbstractCegarLoop]: Abstraction has 52898 states and 95641 transitions. [2021-11-07 01:45:15,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.666666666666666) internal successors, (156), 18 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 52898 states and 95641 transitions. [2021-11-07 01:45:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:45:15,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:15,682 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:15,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:15,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 01:45:16,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:16,087 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:45:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1012385291, now seen corresponding path program 1 times [2021-11-07 01:45:16,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:16,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601517038] [2021-11-07 01:45:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:16,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:16,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:16,089 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:45:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:17,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:17,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:17,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:18,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601517038] [2021-11-07 01:45:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601517038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681431320] [2021-11-07 01:45:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:18,183 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:18,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:18,184 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:18,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:45:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:20,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:45:20,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:45:20,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:45:21,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [681431320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:21,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:21,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-07 01:45:21,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146837344] [2021-11-07 01:45:21,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:45:21,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:21,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:45:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:45:21,176 INFO L87 Difference]: Start difference. First operand 52898 states and 95641 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2021-11-07 01:45:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:25,620 INFO L93 Difference]: Finished difference Result 56779 states and 102171 transitions. [2021-11-07 01:45:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:45:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) Word has length 90 [2021-11-07 01:45:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:25,712 INFO L225 Difference]: With dead ends: 56779 [2021-11-07 01:45:25,712 INFO L226 Difference]: Without dead ends: 52829 [2021-11-07 01:45:25,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:45:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52829 states. [2021-11-07 01:45:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52829 to 52033. [2021-11-07 01:45:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52033 states, 52021 states have (on average 1.8095192326175968) internal successors, (94133), 52032 states have internal predecessors, (94133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52033 states to 52033 states and 94133 transitions. [2021-11-07 01:45:29,753 INFO L78 Accepts]: Start accepts. Automaton has 52033 states and 94133 transitions. Word has length 90 [2021-11-07 01:45:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:29,753 INFO L470 AbstractCegarLoop]: Abstraction has 52033 states and 94133 transitions. [2021-11-07 01:45:29,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2021-11-07 01:45:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 52033 states and 94133 transitions. [2021-11-07 01:45:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:45:29,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:29,787 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:29,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:29,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-07 01:45:30,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:30,188 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:45:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:30,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2091152016, now seen corresponding path program 1 times [2021-11-07 01:45:30,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:30,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606137993] [2021-11-07 01:45:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:30,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:30,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:30,190 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:30,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:45:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:31,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:32,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:32,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:32,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606137993] [2021-11-07 01:45:32,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606137993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:45:32,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1808396608] [2021-11-07 01:45:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:32,399 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:32,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:45:32,400 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:45:32,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_590f0001-1c75-4379-ae2f-060f2989a240/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:45:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:45:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:45:35,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:45:36,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1808396608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:36,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:45:36,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:45:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529268582] [2021-11-07 01:45:36,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:45:36,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:45:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:45:36,143 INFO L87 Difference]: Start difference. First operand 52033 states and 94133 transitions. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 17 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)