./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF --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 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:49:52,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:49:52,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:49:52,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:49:52,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:49:52,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:49:52,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:49:52,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:49:52,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:49:52,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:49:52,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:49:52,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:49:52,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:49:52,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:49:52,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:49:52,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:49:52,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:49:52,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:49:52,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:49:52,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:49:52,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:49:52,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:49:52,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:49:52,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:49:52,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:49:52,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:49:52,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:49:52,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:49:52,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:49:52,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:49:52,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:49:52,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:49:52,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:49:52,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:49:52,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:49:52,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:49:52,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:49:52,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:49:52,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:49:52,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:49:52,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:49:52,618 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:49:52,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:49:52,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:49:52,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:49:52,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:49:52,666 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:49:52,666 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:49:52,667 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:49:52,667 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:49:52,667 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:49:52,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:49:52,669 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:49:52,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:49:52,669 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:49:52,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:49:52,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:49:52,670 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:49:52,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:49:52,671 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:49:52,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:49:52,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:49:52,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:49:52,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:49:52,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:49:52,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:49:52,673 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:49:52,673 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:49:52,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:49:52,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:49:52,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:49:52,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:49:52,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:49:52,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:49:52,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:49:52,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:49:52,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:49:52,676 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:49:52,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:49:52,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:49:52,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:49:52,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:49:52,677 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_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 [2021-11-12 23:49:52,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:49:53,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:49:53,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:49:53,023 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:49:53,023 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:49:53,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-12 23:49:53,089 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data/f3441c7ee/eac392f66ea64b46af794933e3dafa7a/FLAG41528293e [2021-11-12 23:49:53,750 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:49:53,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-12 23:49:53,799 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data/f3441c7ee/eac392f66ea64b46af794933e3dafa7a/FLAG41528293e [2021-11-12 23:49:53,946 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data/f3441c7ee/eac392f66ea64b46af794933e3dafa7a [2021-11-12 23:49:53,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:49:53,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:49:53,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:49:53,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:49:53,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:49:53,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:49:53" (1/1) ... [2021-11-12 23:49:53,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b99bebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:53, skipping insertion in model container [2021-11-12 23:49:53,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:49:53" (1/1) ... [2021-11-12 23:49:53,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:49:54,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:49:54,505 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_0cdc5524-9503-42ef-a561-2012327aee73/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-12 23:49:54,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:49:54,556 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) [2021-11-12 23:49:54,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48ebe0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:54, skipping insertion in model container [2021-11-12 23:49:54,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:49:54,557 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:49:54,559 INFO L158 Benchmark]: Toolchain (without parser) took 608.58ms. Allocated memory is still 113.2MB. Free memory was 73.8MB in the beginning and 79.0MB in the end (delta: -5.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:49:54,559 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 113.2MB. Free memory is still 92.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:49:54,560 INFO L158 Benchmark]: CACSL2BoogieTranslator took 595.32ms. Allocated memory is still 113.2MB. Free memory was 73.7MB in the beginning and 79.0MB in the end (delta: -5.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:49:54,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 113.2MB. Free memory is still 92.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 595.32ms. Allocated memory is still 113.2MB. Free memory was 73.7MB in the beginning and 79.0MB in the end (delta: -5.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF --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 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:49:56,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:49:56,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:49:57,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:49:57,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:49:57,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:49:57,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:49:57,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:49:57,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:49:57,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:49:57,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:49:57,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:49:57,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:49:57,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:49:57,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:49:57,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:49:57,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:49:57,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:49:57,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:49:57,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:49:57,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:49:57,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:49:57,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:49:57,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:49:57,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:49:57,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:49:57,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:49:57,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:49:57,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:49:57,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:49:57,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:49:57,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:49:57,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:49:57,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:49:57,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:49:57,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:49:57,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:49:57,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:49:57,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:49:57,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:49:57,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:49:57,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:49:57,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:49:57,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:49:57,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:49:57,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:49:57,194 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:49:57,194 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:49:57,194 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:49:57,194 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:49:57,195 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:49:57,195 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:49:57,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:49:57,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:49:57,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:49:57,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:49:57,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:49:57,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:49:57,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:49:57,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:49:57,199 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:49:57,200 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:49:57,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:49:57,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:49:57,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:49:57,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:49:57,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:49:57,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:49:57,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:49:57,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:49:57,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:49:57,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:49:57,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:49:57,203 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:49:57,203 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:49:57,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:49:57,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:49:57,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:49:57,204 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_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 [2021-11-12 23:49:57,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:49:57,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:49:57,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:49:57,711 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:49:57,712 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:49:57,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-12 23:49:57,791 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data/27615dd56/f78f3f6f2a4840d7bb5e216a46397b63/FLAG7973e1363 [2021-11-12 23:49:58,569 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:49:58,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-12 23:49:58,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data/27615dd56/f78f3f6f2a4840d7bb5e216a46397b63/FLAG7973e1363 [2021-11-12 23:49:58,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/data/27615dd56/f78f3f6f2a4840d7bb5e216a46397b63 [2021-11-12 23:49:58,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:49:58,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:49:58,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:49:58,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:49:58,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:49:58,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:49:58" (1/1) ... [2021-11-12 23:49:58,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e21bdc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:58, skipping insertion in model container [2021-11-12 23:49:58,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:49:58" (1/1) ... [2021-11-12 23:49:58,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:49:58,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:49:59,491 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_0cdc5524-9503-42ef-a561-2012327aee73/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-12 23:49:59,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:49:59,536 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:49:59,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:49:59,697 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_0cdc5524-9503-42ef-a561-2012327aee73/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-12 23:49:59,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:49:59,708 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:49:59,863 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_0cdc5524-9503-42ef-a561-2012327aee73/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-12 23:49:59,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:49:59,885 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:49:59,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59 WrapperNode [2021-11-12 23:49:59,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:49:59,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:49:59,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:49:59,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:49:59,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:49:59,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:49:59,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:49:59,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:49:59,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:49:59,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:50:00,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:50:00,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:50:00,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:50:00,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:50:00,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:50:00,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:50:00,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:50:00,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:50:00,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:50:00,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:50:00,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:50:00,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (1/1) ... [2021-11-12 23:50:00,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:50:00,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:50:00,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:50:00,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:50:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:50:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:50:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:50:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:50:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:50:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:50:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:50:00,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:50:00,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:50:00,392 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:50:09,932 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 23:50:09,932 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 23:50:09,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:50:09,942 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:50:09,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:50:09 BoogieIcfgContainer [2021-11-12 23:50:09,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:50:09,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:50:09,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:50:09,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:50:09,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:49:58" (1/3) ... [2021-11-12 23:50:09,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c652b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:50:09, skipping insertion in model container [2021-11-12 23:50:09,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:59" (2/3) ... [2021-11-12 23:50:09,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c652b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:50:09, skipping insertion in model container [2021-11-12 23:50:09,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:50:09" (3/3) ... [2021-11-12 23:50:09,954 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-1.c [2021-11-12 23:50:09,959 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:50:09,960 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:50:10,015 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:50:10,022 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 [2021-11-12 23:50:10,023 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:50:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 160 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 23:50:10,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:10,056 INFO L514 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] [2021-11-12 23:50:10,057 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453275, now seen corresponding path program 1 times [2021-11-12 23:50:10,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:10,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094651972] [2021-11-12 23:50:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:10,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:10,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:10,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:10,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:50:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:50:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:10,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:50:10,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:50:10,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:10,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:50:10,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:10,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 23:50:10,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 23:50:11,510 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 23:50:11,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 1289 treesize of output 1241 [2021-11-12 23:50:11,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:11,663 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:50:11,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:11,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 23:50:11,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-12 23:50:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:11,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-12 23:50:12,089 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 23:50:12,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 23:50:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:12,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 23:50:12,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-12 23:50:12,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-12 23:50:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:12,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:12,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:12,616 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 23:50:12,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:12,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:50:12,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:12,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-12 23:50:12,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:12,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-12 23:50:12,831 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:12,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-12 23:50:12,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:12,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-12 23:50:12,888 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:12,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-12 23:50:12,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:50:12,948 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-12 23:50:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:13,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:13,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094651972] [2021-11-12 23:50:13,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094651972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:13,604 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:13,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:50:13,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751538399] [2021-11-12 23:50:13,607 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:13,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:50:13,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:13,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:50:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:50:13,664 INFO L87 Difference]: Start difference. First operand has 161 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 160 states have internal predecessors, (276), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:15,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:17,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:20,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:24,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:25,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:27,590 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:29,621 INFO L93 Difference]: Finished difference Result 323 states and 551 transitions. [2021-11-12 23:50:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:50:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-12 23:50:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:29,646 INFO L225 Difference]: With dead ends: 323 [2021-11-12 23:50:29,648 INFO L226 Difference]: Without dead ends: 148 [2021-11-12 23:50:29,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:50:29,659 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 8 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15402.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 15841.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:29,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1082 Invalid, 287 Unknown, 0 Unchecked, 10.49ms Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 2 Unknown, 65 Unchecked, 15841.54ms Time] [2021-11-12 23:50:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-12 23:50:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-12 23:50:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5714285714285714) internal successors, (231), 147 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 231 transitions. [2021-11-12 23:50:29,733 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 231 transitions. Word has length 46 [2021-11-12 23:50:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:29,734 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 231 transitions. [2021-11-12 23:50:29,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 231 transitions. [2021-11-12 23:50:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 23:50:29,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:29,743 INFO L514 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] [2021-11-12 23:50:29,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:29,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:29,961 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash 176126179, now seen corresponding path program 1 times [2021-11-12 23:50:29,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:29,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700711232] [2021-11-12 23:50:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:29,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:29,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:29,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:29,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:50:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:30,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:50:30,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:30,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:30,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:30,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:30,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:30,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:50:30,889 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:50:30,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:50:34,360 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:50:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:50:42,366 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:50:42,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:50:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:42,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:50,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:50,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700711232] [2021-11-12 23:50:50,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700711232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:50,810 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:50,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-12 23:50:50,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442544515] [2021-11-12 23:50:50,810 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:50,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:50:50,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:50:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 23:50:50,814 INFO L87 Difference]: Start difference. First operand 148 states and 231 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:52,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:54,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:57,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:59,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:59,865 INFO L93 Difference]: Finished difference Result 301 states and 473 transitions. [2021-11-12 23:50:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:50:59,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-12 23:50:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:59,870 INFO L225 Difference]: With dead ends: 301 [2021-11-12 23:50:59,870 INFO L226 Difference]: Without dead ends: 163 [2021-11-12 23:50:59,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 23:50:59,873 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 38 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8833.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 9030.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:59,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 552 Invalid, 107 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 1 Unknown, 18 Unchecked, 9030.95ms Time] [2021-11-12 23:50:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-12 23:50:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2021-11-12 23:50:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.5822784810126582) internal successors, (250), 158 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 250 transitions. [2021-11-12 23:50:59,888 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 250 transitions. Word has length 46 [2021-11-12 23:50:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:59,889 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 250 transitions. [2021-11-12 23:50:59,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:50:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 250 transitions. [2021-11-12 23:50:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:50:59,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:59,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:50:59,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:00,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:00,098 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:00,098 INFO L85 PathProgramCache]: Analyzing trace with hash 755663040, now seen corresponding path program 1 times [2021-11-12 23:51:00,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:00,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933270199] [2021-11-12 23:51:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:00,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:00,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:51:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:00,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:00,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:00,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:00,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:51:00,988 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:51:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:51:04,255 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:51:04,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:51:11,513 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:51:11,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:51:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:11,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:11,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:11,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933270199] [2021-11-12 23:51:11,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933270199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:12,000 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:12,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:51:12,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814872272] [2021-11-12 23:51:12,000 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:12,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:51:12,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:51:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:51:12,003 INFO L87 Difference]: Start difference. First operand 159 states and 250 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:12,788 INFO L93 Difference]: Finished difference Result 299 states and 470 transitions. [2021-11-12 23:51:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:51:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 23:51:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:12,791 INFO L225 Difference]: With dead ends: 299 [2021-11-12 23:51:12,791 INFO L226 Difference]: Without dead ends: 161 [2021-11-12 23:51:12,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:51:12,794 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 20 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 755.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 771.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:12,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 906 Invalid, 110 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 103 Unchecked, 771.16ms Time] [2021-11-12 23:51:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-12 23:51:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-11-12 23:51:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.5759493670886076) internal successors, (249), 158 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 249 transitions. [2021-11-12 23:51:12,818 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 249 transitions. Word has length 59 [2021-11-12 23:51:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:12,818 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 249 transitions. [2021-11-12 23:51:12,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 249 transitions. [2021-11-12 23:51:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:51:12,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:12,821 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:51:12,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:13,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:13,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1854767371, now seen corresponding path program 1 times [2021-11-12 23:51:13,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:13,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826502783] [2021-11-12 23:51:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:13,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:13,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:13,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:13,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:51:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:13,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:13,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:13,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:13,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:13,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:51:14,016 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:51:14,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:51:17,365 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:51:17,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:51:24,124 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:51:24,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:51:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:24,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:24,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:24,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826502783] [2021-11-12 23:51:24,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826502783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:24,651 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:24,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:51:24,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548045944] [2021-11-12 23:51:24,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:24,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:51:24,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:51:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:51:24,654 INFO L87 Difference]: Start difference. First operand 159 states and 249 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:26,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:29,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:32,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:32,212 INFO L93 Difference]: Finished difference Result 308 states and 484 transitions. [2021-11-12 23:51:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:51:32,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:51:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:32,216 INFO L225 Difference]: With dead ends: 308 [2021-11-12 23:51:32,216 INFO L226 Difference]: Without dead ends: 170 [2021-11-12 23:51:32,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:51:32,218 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 27 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7360.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.97ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 7535.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:32,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 782 Invalid, 167 Unknown, 0 Unchecked, 3.97ms Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 1 Unknown, 37 Unchecked, 7535.77ms Time] [2021-11-12 23:51:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-12 23:51:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-12 23:51:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5621301775147929) internal successors, (264), 169 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 264 transitions. [2021-11-12 23:51:32,243 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 264 transitions. Word has length 60 [2021-11-12 23:51:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:32,243 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 264 transitions. [2021-11-12 23:51:32,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 264 transitions. [2021-11-12 23:51:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:51:32,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:32,245 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:51:32,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:32,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:32,449 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:32,450 INFO L85 PathProgramCache]: Analyzing trace with hash 219231991, now seen corresponding path program 1 times [2021-11-12 23:51:32,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:32,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827804202] [2021-11-12 23:51:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:32,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:32,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:32,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:32,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:51:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:32,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:32,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:32,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:32,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:51:33,322 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:51:33,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:51:36,622 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:51:36,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:51:43,423 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:51:43,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:51:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:43,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:43,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:43,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827804202] [2021-11-12 23:51:43,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827804202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:43,909 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:43,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:51:43,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077883775] [2021-11-12 23:51:43,910 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:43,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:51:43,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:51:43,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:51:43,911 INFO L87 Difference]: Start difference. First operand 170 states and 264 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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) [2021-11-12 23:51:45,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:49,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:50,683 INFO L93 Difference]: Finished difference Result 331 states and 516 transitions. [2021-11-12 23:51:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:51:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 60 [2021-11-12 23:51:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:50,687 INFO L225 Difference]: With dead ends: 331 [2021-11-12 23:51:50,687 INFO L226 Difference]: Without dead ends: 182 [2021-11-12 23:51:50,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:51:50,688 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 20 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6564.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.53ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 6751.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:50,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1021 Invalid, 329 Unknown, 0 Unchecked, 3.53ms Time], IncrementalHoareTripleChecker [24 Valid, 100 Invalid, 2 Unknown, 203 Unchecked, 6751.93ms Time] [2021-11-12 23:51:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-12 23:51:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-12 23:51:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5469613259668509) internal successors, (280), 181 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:51:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 280 transitions. [2021-11-12 23:51:50,702 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 280 transitions. Word has length 60 [2021-11-12 23:51:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:50,703 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 280 transitions. [2021-11-12 23:51:50,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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) [2021-11-12 23:51:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 280 transitions. [2021-11-12 23:51:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:51:50,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:50,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:50,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 23:51:50,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:50,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash -426584320, now seen corresponding path program 1 times [2021-11-12 23:51:50,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:50,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889017333] [2021-11-12 23:51:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:50,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:50,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:50,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:51:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:51,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:51,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:51,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:51,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:51,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:51:51,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:51:51,741 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:51:51,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:51:55,143 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:51:55,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:52:02,633 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:52:02,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:52:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:02,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:03,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:03,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889017333] [2021-11-12 23:52:03,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889017333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:03,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:03,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:52:03,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935019633] [2021-11-12 23:52:03,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:03,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:03,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:03,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:52:03,154 INFO L87 Difference]: Start difference. First operand 182 states and 280 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:05,182 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:09,272 INFO L93 Difference]: Finished difference Result 354 states and 549 transitions. [2021-11-12 23:52:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:52:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:52:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:09,275 INFO L225 Difference]: With dead ends: 354 [2021-11-12 23:52:09,275 INFO L226 Difference]: Without dead ends: 193 [2021-11-12 23:52:09,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:52:09,276 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 37 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5949.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.67ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 6100.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:09,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 869 Invalid, 257 Unknown, 0 Unchecked, 2.67ms Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 1 Unknown, 136 Unchecked, 6100.60ms Time] [2021-11-12 23:52:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-12 23:52:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-11-12 23:52:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.553191489361702) internal successors, (292), 188 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 292 transitions. [2021-11-12 23:52:09,288 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 292 transitions. Word has length 60 [2021-11-12 23:52:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:09,288 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 292 transitions. [2021-11-12 23:52:09,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 292 transitions. [2021-11-12 23:52:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:52:09,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:09,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:09,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:09,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:09,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:09,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:09,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1898096192, now seen corresponding path program 1 times [2021-11-12 23:52:09,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:09,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458766019] [2021-11-12 23:52:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:09,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:09,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:09,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:09,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:52:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:09,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:09,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:09,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:09,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:09,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:09,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:52:10,302 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:52:10,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:52:13,646 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:52:13,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:52:20,941 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:52:20,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:52:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:21,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:21,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458766019] [2021-11-12 23:52:21,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458766019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:21,375 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:21,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:52:21,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544612058] [2021-11-12 23:52:21,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:21,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:21,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:21,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:21,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:52:21,376 INFO L87 Difference]: Start difference. First operand 189 states and 292 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:23,399 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:28,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:29,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:30,096 INFO L93 Difference]: Finished difference Result 361 states and 560 transitions. [2021-11-12 23:52:30,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:52:30,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:52:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:30,103 INFO L225 Difference]: With dead ends: 361 [2021-11-12 23:52:30,104 INFO L226 Difference]: Without dead ends: 193 [2021-11-12 23:52:30,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:52:30,106 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 35 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8510.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 8702.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:30,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 776 Invalid, 210 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [30 Valid, 100 Invalid, 1 Unknown, 79 Unchecked, 8702.29ms Time] [2021-11-12 23:52:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-12 23:52:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-11-12 23:52:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.5425531914893618) internal successors, (290), 188 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 290 transitions. [2021-11-12 23:52:30,121 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 290 transitions. Word has length 60 [2021-11-12 23:52:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:30,124 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 290 transitions. [2021-11-12 23:52:30,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 290 transitions. [2021-11-12 23:52:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:52:30,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:30,126 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:52:30,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:30,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:30,329 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:30,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1920769353, now seen corresponding path program 1 times [2021-11-12 23:52:30,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:30,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279876578] [2021-11-12 23:52:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:30,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:30,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:30,332 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:30,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:52:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:30,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:30,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:30,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:30,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:30,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:30,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:52:31,172 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:52:31,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:52:34,464 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:52:34,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:52:41,382 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:52:41,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:52:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:41,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:41,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:41,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279876578] [2021-11-12 23:52:41,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279876578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:41,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:41,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:52:41,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338874565] [2021-11-12 23:52:41,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:41,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:41,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:41,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:41,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:52:41,837 INFO L87 Difference]: Start difference. First operand 189 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:43,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:46,864 INFO L93 Difference]: Finished difference Result 380 states and 586 transitions. [2021-11-12 23:52:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:52:46,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 23:52:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:46,868 INFO L225 Difference]: With dead ends: 380 [2021-11-12 23:52:46,868 INFO L226 Difference]: Without dead ends: 212 [2021-11-12 23:52:46,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:52:46,870 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 35 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4831.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 5010.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:46,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 584 Invalid, 173 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [29 Valid, 102 Invalid, 1 Unknown, 41 Unchecked, 5010.21ms Time] [2021-11-12 23:52:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-12 23:52:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 202. [2021-11-12 23:52:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5323383084577114) internal successors, (308), 201 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 308 transitions. [2021-11-12 23:52:46,880 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 308 transitions. Word has length 61 [2021-11-12 23:52:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:46,881 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 308 transitions. [2021-11-12 23:52:46,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 308 transitions. [2021-11-12 23:52:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:52:46,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:46,883 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:52:46,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:47,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:47,097 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1011603538, now seen corresponding path program 1 times [2021-11-12 23:52:47,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:47,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36671589] [2021-11-12 23:52:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:47,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:47,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:47,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:47,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:52:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:47,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:52:47,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:47,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:47,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:52:47,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:52:47,940 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:52:47,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:52:51,190 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:52:51,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:52:58,228 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:52:58,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:52:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:58,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:58,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:58,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36671589] [2021-11-12 23:52:58,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36671589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:58,677 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:58,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:52:58,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526465620] [2021-11-12 23:52:58,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:58,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:58,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:58,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:58,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:52:58,680 INFO L87 Difference]: Start difference. First operand 202 states and 308 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:59,157 INFO L93 Difference]: Finished difference Result 394 states and 604 transitions. [2021-11-12 23:52:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 23:52:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:59,160 INFO L225 Difference]: With dead ends: 394 [2021-11-12 23:52:59,160 INFO L226 Difference]: Without dead ends: 213 [2021-11-12 23:52:59,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:52:59,162 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 6 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 455.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 466.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:59,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 834 Invalid, 105 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 466.45ms Time] [2021-11-12 23:52:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-12 23:52:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-11-12 23:52:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5141509433962264) internal successors, (321), 212 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 321 transitions. [2021-11-12 23:52:59,175 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 321 transitions. Word has length 62 [2021-11-12 23:52:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:59,176 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 321 transitions. [2021-11-12 23:52:59,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:52:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 321 transitions. [2021-11-12 23:52:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:52:59,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:59,178 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:52:59,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:59,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:59,393 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1445332624, now seen corresponding path program 1 times [2021-11-12 23:52:59,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:59,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131631815] [2021-11-12 23:52:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:59,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:59,396 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:59,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:52:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:59,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:00,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:00,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131631815] [2021-11-12 23:53:00,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131631815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:00,117 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:00,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:53:00,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565468291] [2021-11-12 23:53:00,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:00,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:53:00,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:00,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:53:00,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:00,119 INFO L87 Difference]: Start difference. First operand 213 states and 321 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:00,180 INFO L93 Difference]: Finished difference Result 753 states and 1157 transitions. [2021-11-12 23:53:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:00,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 23:53:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:00,185 INFO L225 Difference]: With dead ends: 753 [2021-11-12 23:53:00,186 INFO L226 Difference]: Without dead ends: 572 [2021-11-12 23:53:00,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:00,187 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 625 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:00,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 688 Invalid, 13 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 35.84ms Time] [2021-11-12 23:53:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-12 23:53:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 393. [2021-11-12 23:53:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.5178571428571428) internal successors, (595), 392 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 595 transitions. [2021-11-12 23:53:00,212 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 595 transitions. Word has length 62 [2021-11-12 23:53:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:00,213 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 595 transitions. [2021-11-12 23:53:00,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 595 transitions. [2021-11-12 23:53:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:53:00,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:00,215 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:53:00,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:00,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:00,435 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:00,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash -921361970, now seen corresponding path program 1 times [2021-11-12 23:53:00,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:00,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245466339] [2021-11-12 23:53:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:00,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:00,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:00,438 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:00,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:53:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:53:00,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:01,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:01,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:01,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:01,416 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:53:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:53:04,688 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:53:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:53:11,886 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:53:11,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:53:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:12,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:12,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:12,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245466339] [2021-11-12 23:53:12,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245466339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:12,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:12,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:53:12,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544057263] [2021-11-12 23:53:12,359 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:12,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:53:12,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:53:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:53:12,361 INFO L87 Difference]: Start difference. First operand 393 states and 595 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:14,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:20,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:22,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:27,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:30,861 INFO L93 Difference]: Finished difference Result 943 states and 1451 transitions. [2021-11-12 23:53:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:53:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-12 23:53:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:30,868 INFO L225 Difference]: With dead ends: 943 [2021-11-12 23:53:30,868 INFO L226 Difference]: Without dead ends: 587 [2021-11-12 23:53:30,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-12 23:53:30,871 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 155 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 49 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13946.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.69ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 14343.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:30,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 582 Invalid, 405 Unknown, 0 Unchecked, 3.69ms Time], IncrementalHoareTripleChecker [49 Valid, 234 Invalid, 2 Unknown, 120 Unchecked, 14343.46ms Time] [2021-11-12 23:53:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-12 23:53:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 395. [2021-11-12 23:53:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.5126903553299493) internal successors, (596), 394 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 596 transitions. [2021-11-12 23:53:30,896 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 596 transitions. Word has length 62 [2021-11-12 23:53:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 596 transitions. [2021-11-12 23:53:30,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 596 transitions. [2021-11-12 23:53:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 23:53:30,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:30,898 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:53:30,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:31,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:31,116 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2021179534, now seen corresponding path program 1 times [2021-11-12 23:53:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:31,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649960871] [2021-11-12 23:53:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:31,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:31,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:31,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:53:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:31,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:53:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:31,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:31,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:31,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:31,977 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:53:31,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:53:35,314 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:53:35,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:53:42,378 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:53:42,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:53:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:42,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:42,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:42,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649960871] [2021-11-12 23:53:42,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649960871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:42,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:42,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:53:42,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386382947] [2021-11-12 23:53:42,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:42,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:53:42,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:53:42,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:53:42,821 INFO L87 Difference]: Start difference. First operand 395 states and 596 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:43,369 INFO L93 Difference]: Finished difference Result 753 states and 1148 transitions. [2021-11-12 23:53:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:53:43,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-12 23:53:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:43,373 INFO L225 Difference]: With dead ends: 753 [2021-11-12 23:53:43,373 INFO L226 Difference]: Without dead ends: 395 [2021-11-12 23:53:43,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:53:43,375 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 6 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 510.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 531.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:43,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1052 Invalid, 109 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 102 Unchecked, 531.54ms Time] [2021-11-12 23:53:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-12 23:53:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2021-11-12 23:53:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.5101522842639594) internal successors, (595), 394 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 595 transitions. [2021-11-12 23:53:43,395 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 595 transitions. Word has length 63 [2021-11-12 23:53:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:43,396 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 595 transitions. [2021-11-12 23:53:43,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 595 transitions. [2021-11-12 23:53:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 23:53:43,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:43,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:43,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:43,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:43,616 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:43,616 INFO L85 PathProgramCache]: Analyzing trace with hash 485580554, now seen corresponding path program 1 times [2021-11-12 23:53:43,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:43,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635726847] [2021-11-12 23:53:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:43,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:43,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:43,618 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:43,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:53:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:44,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:53:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:44,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:44,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:44,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:44,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:44,525 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:53:44,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:53:45,672 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:53:45,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:53:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:45,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:46,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:46,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635726847] [2021-11-12 23:53:46,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635726847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:46,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:46,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:53:46,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981890486] [2021-11-12 23:53:46,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:46,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:53:46,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:53:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:53:46,016 INFO L87 Difference]: Start difference. First operand 395 states and 595 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) [2021-11-12 23:53:48,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:51,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:57,545 INFO L93 Difference]: Finished difference Result 834 states and 1259 transitions. [2021-11-12 23:53:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:57,548 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 63 [2021-11-12 23:53:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:57,551 INFO L225 Difference]: With dead ends: 834 [2021-11-12 23:53:57,551 INFO L226 Difference]: Without dead ends: 476 [2021-11-12 23:53:57,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:53:57,553 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 56 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11122.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11436.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:57,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 585 Invalid, 181 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [16 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 11436.30ms Time] [2021-11-12 23:53:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-12 23:53:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 438. [2021-11-12 23:53:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.5011441647597255) internal successors, (656), 437 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:53:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 656 transitions. [2021-11-12 23:53:57,577 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 656 transitions. Word has length 63 [2021-11-12 23:53:57,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:57,578 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 656 transitions. [2021-11-12 23:53:57,578 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) [2021-11-12 23:53:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 656 transitions. [2021-11-12 23:53:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 23:53:57,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:57,580 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:53:57,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 23:53:57,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:57,796 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:57,796 INFO L85 PathProgramCache]: Analyzing trace with hash 467792946, now seen corresponding path program 1 times [2021-11-12 23:53:57,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:57,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166872724] [2021-11-12 23:53:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:57,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:57,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:57,798 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:57,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:53:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:58,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:53:58,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:58,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:58,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:53:58,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:53:58,698 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:53:58,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:54:02,111 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:54:02,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-12 23:54:09,306 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:54:09,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-12 23:54:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:54:09,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:54:09,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:09,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166872724] [2021-11-12 23:54:09,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166872724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:09,747 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:09,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:54:09,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969903164] [2021-11-12 23:54:09,747 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:09,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:54:09,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:54:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:54:09,748 INFO L87 Difference]: Start difference. First operand 438 states and 656 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:54:11,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:15,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:17,288 INFO L93 Difference]: Finished difference Result 859 states and 1294 transitions. [2021-11-12 23:54:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:54:17,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-12 23:54:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:17,298 INFO L225 Difference]: With dead ends: 859 [2021-11-12 23:54:17,298 INFO L226 Difference]: Without dead ends: 458 [2021-11-12 23:54:17,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:54:17,300 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 32 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7310.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 7514.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:17,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 637 Invalid, 228 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [32 Valid, 109 Invalid, 1 Unknown, 86 Unchecked, 7514.14ms Time] [2021-11-12 23:54:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-12 23:54:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 438. [2021-11-12 23:54:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.4897025171624714) internal successors, (651), 437 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:54:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 651 transitions. [2021-11-12 23:54:17,332 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 651 transitions. Word has length 63 [2021-11-12 23:54:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:17,333 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 651 transitions. [2021-11-12 23:54:17,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:54:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 651 transitions. [2021-11-12 23:54:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 23:54:17,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:17,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:17,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:17,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:17,570 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash 103289337, now seen corresponding path program 1 times [2021-11-12 23:54:17,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:17,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381967641] [2021-11-12 23:54:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:17,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:17,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:17,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:17,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:54:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:18,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:54:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:18,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:18,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:18,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:18,481 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:54:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:54:19,204 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:54:19,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-12 23:54:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:54:19,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:54:19,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:19,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381967641] [2021-11-12 23:54:19,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381967641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:19,607 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:19,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:54:19,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805116786] [2021-11-12 23:54:19,607 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:19,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:54:19,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:54:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:54:19,609 INFO L87 Difference]: Start difference. First operand 438 states and 651 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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) [2021-11-12 23:54:21,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:25,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:29,338 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:31,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:34,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:35,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:37,391 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:43,589 INFO L93 Difference]: Finished difference Result 1096 states and 1657 transitions. [2021-11-12 23:54:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:54:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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 76 [2021-11-12 23:54:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:43,595 INFO L225 Difference]: With dead ends: 1096 [2021-11-12 23:54:43,595 INFO L226 Difference]: Without dead ends: 695 [2021-11-12 23:54:43,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:54:43,597 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 204 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23227.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.67ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23841.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:43,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 559 Invalid, 428 Unknown, 0 Unchecked, 3.67ms Time], IncrementalHoareTripleChecker [60 Valid, 367 Invalid, 1 Unknown, 0 Unchecked, 23841.51ms Time] [2021-11-12 23:54:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-11-12 23:54:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 469. [2021-11-12 23:54:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.4700854700854702) internal successors, (688), 468 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:54:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 688 transitions. [2021-11-12 23:54:43,623 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 688 transitions. Word has length 76 [2021-11-12 23:54:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:43,623 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 688 transitions. [2021-11-12 23:54:43,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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) [2021-11-12 23:54:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 688 transitions. [2021-11-12 23:54:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:54:43,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:43,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:43,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:43,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:43,837 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:43,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1965557864, now seen corresponding path program 1 times [2021-11-12 23:54:43,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:43,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863998136] [2021-11-12 23:54:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:43,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:43,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:43,839 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:43,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:54:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:54:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:44,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:44,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:44,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:44,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:44,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:54:44,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:44,420 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:54:44,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:54:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:44,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:44,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:54:44,805 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:54:44,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:54:47,027 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:54:47,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:54:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:54:47,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:54:47,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:47,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863998136] [2021-11-12 23:54:47,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863998136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:47,480 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:47,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:54:47,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549059520] [2021-11-12 23:54:47,480 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:47,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:54:47,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:54:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:54:47,482 INFO L87 Difference]: Start difference. First operand 469 states and 688 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:54:49,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:00,496 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:09,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:13,002 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:14,486 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:18,471 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:20,040 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:24,418 INFO L93 Difference]: Finished difference Result 1380 states and 2068 transitions. [2021-11-12 23:55:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:55:24,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 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 [2021-11-12 23:55:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:24,425 INFO L225 Difference]: With dead ends: 1380 [2021-11-12 23:55:24,425 INFO L226 Difference]: Without dead ends: 948 [2021-11-12 23:55:24,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:55:24,428 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 342 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 79 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35768.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.29ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36781.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:24,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 885 Invalid, 691 Unknown, 0 Unchecked, 5.29ms Time], IncrementalHoareTripleChecker [79 Valid, 610 Invalid, 2 Unknown, 0 Unchecked, 36781.90ms Time] [2021-11-12 23:55:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-11-12 23:55:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 575. [2021-11-12 23:55:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.4912891986062717) internal successors, (856), 574 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:55:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 856 transitions. [2021-11-12 23:55:24,467 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 856 transitions. Word has length 85 [2021-11-12 23:55:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:55:24,468 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 856 transitions. [2021-11-12 23:55:24,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:55:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 856 transitions. [2021-11-12 23:55:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:55:24,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:55:24,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:55:24,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:55:24,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:55:24,689 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:55:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:55:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -660899661, now seen corresponding path program 1 times [2021-11-12 23:55:24,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:55:24,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801305261] [2021-11-12 23:55:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:55:24,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:55:24,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:55:24,692 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:55:24,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:55:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:55:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:55:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:55:25,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:55:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:55:25,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:55:25,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:55:25,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:55:25,348 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:55:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:55:25,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:55:25,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:55:25,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:55:25,747 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:55:25,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:55:28,111 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:55:28,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:55:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:55:28,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:55:28,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:28,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801305261] [2021-11-12 23:55:28,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801305261] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:55:28,725 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:55:28,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:55:28,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437195400] [2021-11-12 23:55:28,725 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:55:28,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:55:28,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:55:28,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:55:28,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:55:28,726 INFO L87 Difference]: Start difference. First operand 575 states and 856 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:55:30,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:32,770 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:41,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:43,399 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:47,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:49,665 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:53,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:55,392 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:57,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:55:59,665 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:56:01,680 INFO L93 Difference]: Finished difference Result 1510 states and 2289 transitions. [2021-11-12 23:56:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:56:01,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 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 [2021-11-12 23:56:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:56:01,687 INFO L225 Difference]: With dead ends: 1510 [2021-11-12 23:56:01,687 INFO L226 Difference]: Without dead ends: 972 [2021-11-12 23:56:01,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:56:01,689 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 335 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32022.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.51ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32799.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:56:01,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 654 Invalid, 498 Unknown, 0 Unchecked, 4.51ms Time], IncrementalHoareTripleChecker [80 Valid, 416 Invalid, 2 Unknown, 0 Unchecked, 32799.04ms Time] [2021-11-12 23:56:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-11-12 23:56:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 619. [2021-11-12 23:56:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 1.5242718446601942) internal successors, (942), 618 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:56:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 942 transitions. [2021-11-12 23:56:01,728 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 942 transitions. Word has length 86 [2021-11-12 23:56:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:56:01,728 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 942 transitions. [2021-11-12 23:56:01,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:56:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 942 transitions. [2021-11-12 23:56:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:56:01,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:56:01,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:56:01,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:56:01,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:56:01,946 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:56:01,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:56:01,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1795100272, now seen corresponding path program 1 times [2021-11-12 23:56:01,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:56:01,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440944846] [2021-11-12 23:56:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:56:01,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:56:01,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:56:01,949 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:56:01,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:56:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:56:02,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:56:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:56:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:02,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:02,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:02,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:56:02,686 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:56:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:56:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:56:02,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:56:02,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:56:03,097 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:56:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:56:04,904 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:56:04,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:56:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:56:05,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:56:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:56:05,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:56:05,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440944846] [2021-11-12 23:56:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440944846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:56:05,496 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:56:05,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:56:05,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611499646] [2021-11-12 23:56:05,499 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:56:05,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:56:05,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:56:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:56:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:56:05,501 INFO L87 Difference]: Start difference. First operand 619 states and 942 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:56:07,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:09,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:11,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:22,097 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:25,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:26,755 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:28,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:34,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:35,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:37,709 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:39,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:42,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:56:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:56:45,162 INFO L93 Difference]: Finished difference Result 1670 states and 2563 transitions. [2021-11-12 23:56:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:56:45,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 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 114 [2021-11-12 23:56:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:56:45,173 INFO L225 Difference]: With dead ends: 1670 [2021-11-12 23:56:45,173 INFO L226 Difference]: Without dead ends: 1088 [2021-11-12 23:56:45,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:56:45,176 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 233 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 52 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38507.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.91ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39500.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:56:45,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1020 Invalid, 665 Unknown, 0 Unchecked, 4.91ms Time], IncrementalHoareTripleChecker [52 Valid, 608 Invalid, 5 Unknown, 0 Unchecked, 39500.39ms Time] [2021-11-12 23:56:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-11-12 23:56:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 745. [2021-11-12 23:56:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.5268817204301075) internal successors, (1136), 744 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:56:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1136 transitions. [2021-11-12 23:56:45,221 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1136 transitions. Word has length 114 [2021-11-12 23:56:45,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:56:45,222 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1136 transitions. [2021-11-12 23:56:45,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:56:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1136 transitions. [2021-11-12 23:56:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:56:45,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:56:45,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:56:45,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:56:45,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:56:45,447 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:56:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:56:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash 958734803, now seen corresponding path program 1 times [2021-11-12 23:56:45,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:56:45,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161771947] [2021-11-12 23:56:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:56:45,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:56:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:56:45,449 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:56:45,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:56:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:56:45,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:56:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:56:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:56:46,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:56:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:56:46,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:56:46,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161771947] [2021-11-12 23:56:46,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161771947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:56:46,333 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:56:46,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:56:46,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179642994] [2021-11-12 23:56:46,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:56:46,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:56:46,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:56:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:56:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:56:46,335 INFO L87 Difference]: Start difference. First operand 745 states and 1136 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2021-11-12 23:56:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:56:46,907 INFO L93 Difference]: Finished difference Result 2826 states and 4363 transitions. [2021-11-12 23:56:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:56:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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 116 [2021-11-12 23:56:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:56:46,918 INFO L225 Difference]: With dead ends: 2826 [2021-11-12 23:56:46,918 INFO L226 Difference]: Without dead ends: 2118 [2021-11-12 23:56:46,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:56:46,920 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 333 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 464.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 512.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:56:46,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 608 Invalid, 166 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [60 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 512.50ms Time] [2021-11-12 23:56:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-11-12 23:56:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2099. [2021-11-12 23:56:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 1.5252621544327931) internal successors, (3200), 2098 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:56:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 3200 transitions. [2021-11-12 23:56:47,031 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 3200 transitions. Word has length 116 [2021-11-12 23:56:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:56:47,032 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 3200 transitions. [2021-11-12 23:56:47,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 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) [2021-11-12 23:56:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 3200 transitions. [2021-11-12 23:56:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:56:47,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:56:47,038 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:56:47,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:56:47,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:56:47,256 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:56:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:56:47,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1206881297, now seen corresponding path program 1 times [2021-11-12 23:56:47,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:56:47,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740121117] [2021-11-12 23:56:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:56:47,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:56:47,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:56:47,259 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:56:47,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:56:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:56:47,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:56:47,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:56:47,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:47,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:47,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:47,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:47,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:56:47,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:56:47,971 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:56:47,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:56:48,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:56:48,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:56:48,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:56:48,399 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:56:48,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:56:49,983 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:56:49,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:56:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:56:50,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:56:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:56:50,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:56:50,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740121117] [2021-11-12 23:56:50,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740121117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:56:50,651 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:56:50,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:56:50,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670552588] [2021-11-12 23:56:50,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:56:50,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:56:50,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:56:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:56:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:56:50,652 INFO L87 Difference]: Start difference. First operand 2099 states and 3200 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:56:52,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:00,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:05,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:07,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:15,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:17,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:19,087 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:20,766 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:22,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:30,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:33,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:35,808 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:36,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:37,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:57:37,695 INFO L93 Difference]: Finished difference Result 5402 states and 8185 transitions. [2021-11-12 23:57:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:57:37,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-12 23:57:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:57:37,712 INFO L225 Difference]: With dead ends: 5402 [2021-11-12 23:57:37,712 INFO L226 Difference]: Without dead ends: 3340 [2021-11-12 23:57:37,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:57:37,714 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 260 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45724.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.21ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46812.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:57:37,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 869 Invalid, 700 Unknown, 0 Unchecked, 5.21ms Time], IncrementalHoareTripleChecker [74 Valid, 625 Invalid, 1 Unknown, 0 Unchecked, 46812.56ms Time] [2021-11-12 23:57:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-11-12 23:57:37,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 2264. [2021-11-12 23:57:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 1.5134776844896156) internal successors, (3425), 2263 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:57:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3425 transitions. [2021-11-12 23:57:37,859 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3425 transitions. Word has length 116 [2021-11-12 23:57:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:57:37,859 INFO L470 AbstractCegarLoop]: Abstraction has 2264 states and 3425 transitions. [2021-11-12 23:57:37,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:57:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3425 transitions. [2021-11-12 23:57:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:57:37,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:57:37,866 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:57:37,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:57:38,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:57:38,080 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:57:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:57:38,081 INFO L85 PathProgramCache]: Analyzing trace with hash -368476837, now seen corresponding path program 1 times [2021-11-12 23:57:38,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:57:38,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926043836] [2021-11-12 23:57:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:57:38,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:57:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:57:38,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:57:38,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:57:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:57:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:57:38,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:57:38,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:57:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:57:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:57:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:57:38,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:57:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:57:38,773 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:57:38,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:57:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:57:38,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:57:38,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:57:39,189 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:57:39,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:57:40,796 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:57:40,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:57:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:57:40,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:57:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:57:41,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:57:41,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926043836] [2021-11-12 23:57:41,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926043836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:57:41,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:57:41,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:57:41,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442482791] [2021-11-12 23:57:41,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:57:41,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:57:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:57:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:57:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:57:41,383 INFO L87 Difference]: Start difference. First operand 2264 states and 3425 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:57:43,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:50,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:57:52,092 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:05,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:07,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:09,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:11,459 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:12,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:58:14,991 INFO L93 Difference]: Finished difference Result 5447 states and 8176 transitions. [2021-11-12 23:58:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:58:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-12 23:58:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:58:15,012 INFO L225 Difference]: With dead ends: 5447 [2021-11-12 23:58:15,012 INFO L226 Difference]: Without dead ends: 3220 [2021-11-12 23:58:15,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:58:15,015 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 330 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 76 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32504.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33375.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:58:15,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 732 Invalid, 600 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [76 Valid, 522 Invalid, 2 Unknown, 0 Unchecked, 33375.02ms Time] [2021-11-12 23:58:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-12 23:58:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2264. [2021-11-12 23:58:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 1.5028722934158196) internal successors, (3401), 2263 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:58:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3401 transitions. [2021-11-12 23:58:15,157 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3401 transitions. Word has length 117 [2021-11-12 23:58:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:58:15,157 INFO L470 AbstractCegarLoop]: Abstraction has 2264 states and 3401 transitions. [2021-11-12 23:58:15,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:58:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3401 transitions. [2021-11-12 23:58:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:58:15,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:58:15,164 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:58:15,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:58:15,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:58:15,384 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:58:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:58:15,385 INFO L85 PathProgramCache]: Analyzing trace with hash -440759163, now seen corresponding path program 1 times [2021-11-12 23:58:15,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:58:15,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901556840] [2021-11-12 23:58:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:58:15,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:58:15,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:58:15,387 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:58:15,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:58:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:58:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:58:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:58:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:15,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:15,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:58:16,051 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:58:16,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:58:16,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:58:16,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:58:16,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:58:16,453 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:58:16,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:58:18,616 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:58:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:58:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:58:18,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:58:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:58:19,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:58:19,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901556840] [2021-11-12 23:58:19,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901556840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:58:19,249 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:58:19,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:58:19,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336703407] [2021-11-12 23:58:19,249 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:58:19,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:58:19,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:58:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:58:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:58:19,250 INFO L87 Difference]: Start difference. First operand 2264 states and 3401 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:58:21,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:23,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:31,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:37,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:44,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:46,939 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:48,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:49,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:52,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:55,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:58:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:58:56,064 INFO L93 Difference]: Finished difference Result 5684 states and 8485 transitions. [2021-11-12 23:58:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:58:56,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-12 23:58:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:58:56,084 INFO L225 Difference]: With dead ends: 5684 [2021-11-12 23:58:56,084 INFO L226 Difference]: Without dead ends: 3457 [2021-11-12 23:58:56,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:58:56,087 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 239 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35638.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36570.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:58:56,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 707 Invalid, 579 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [69 Valid, 507 Invalid, 3 Unknown, 0 Unchecked, 36570.47ms Time] [2021-11-12 23:58:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-11-12 23:58:56,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2483. [2021-11-12 23:58:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 1.5020145044319098) internal successors, (3728), 2482 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:58:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3728 transitions. [2021-11-12 23:58:56,234 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3728 transitions. Word has length 120 [2021-11-12 23:58:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:58:56,234 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 3728 transitions. [2021-11-12 23:58:56,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:58:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3728 transitions. [2021-11-12 23:58:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 23:58:56,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:58:56,240 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:58:56,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:58:56,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:58:56,461 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:58:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:58:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash -404149718, now seen corresponding path program 1 times [2021-11-12 23:58:56,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:58:56,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750318861] [2021-11-12 23:58:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:58:56,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:58:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:58:56,464 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:58:56,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:58:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:58:56,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:58:56,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:58:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:57,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:57,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:57,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:57,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:58:57,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:58:57,220 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:58:57,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:58:57,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:58:57,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:58:57,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:58:57,724 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:58:57,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:58:59,928 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:58:59,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:59:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:59:00,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:59:00,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:59:00,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750318861] [2021-11-12 23:59:00,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750318861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:59:00,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:59:00,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:59:00,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401508480] [2021-11-12 23:59:00,556 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:59:00,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:59:00,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:59:00,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:59:00,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:59:00,557 INFO L87 Difference]: Start difference. First operand 2483 states and 3728 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:02,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:10,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:15,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:23,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:59:25,351 INFO L93 Difference]: Finished difference Result 6104 states and 9111 transitions. [2021-11-12 23:59:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:59:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-12 23:59:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:59:25,369 INFO L225 Difference]: With dead ends: 6104 [2021-11-12 23:59:25,369 INFO L226 Difference]: Without dead ends: 3658 [2021-11-12 23:59:25,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:59:25,372 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 349 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23753.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24540.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:59:25,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 742 Invalid, 591 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [74 Valid, 515 Invalid, 2 Unknown, 0 Unchecked, 24540.95ms Time] [2021-11-12 23:59:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-11-12 23:59:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2708. [2021-11-12 23:59:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2708 states, 2707 states have (on average 1.5024011821204286) internal successors, (4067), 2707 states have internal predecessors, (4067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 4067 transitions. [2021-11-12 23:59:25,548 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 4067 transitions. Word has length 121 [2021-11-12 23:59:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:59:25,548 INFO L470 AbstractCegarLoop]: Abstraction has 2708 states and 4067 transitions. [2021-11-12 23:59:25,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 4067 transitions. [2021-11-12 23:59:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:59:25,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:59:25,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:59:25,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:59:25,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:59:25,774 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:59:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:59:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1206993117, now seen corresponding path program 1 times [2021-11-12 23:59:25,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:59:25,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681326253] [2021-11-12 23:59:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:59:25,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:59:25,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:59:25,777 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:59:25,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:59:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:59:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:59:26,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:59:26,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:59:26,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:59:26,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681326253] [2021-11-12 23:59:26,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681326253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:59:26,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:59:26,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:59:26,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661045585] [2021-11-12 23:59:26,765 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:59:26,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:59:26,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:59:26,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:59:26,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:59:26,766 INFO L87 Difference]: Start difference. First operand 2708 states and 4067 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:59:27,305 INFO L93 Difference]: Finished difference Result 5432 states and 8163 transitions. [2021-11-12 23:59:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:59:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 128 [2021-11-12 23:59:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:59:27,327 INFO L225 Difference]: With dead ends: 5432 [2021-11-12 23:59:27,327 INFO L226 Difference]: Without dead ends: 2761 [2021-11-12 23:59:27,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:59:27,331 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 15 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 399.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 424.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:59:27,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 430 Invalid, 45 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 424.58ms Time] [2021-11-12 23:59:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-11-12 23:59:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2761. [2021-11-12 23:59:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2760 states have (on average 1.4978260869565216) internal successors, (4134), 2760 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 4134 transitions. [2021-11-12 23:59:27,502 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 4134 transitions. Word has length 128 [2021-11-12 23:59:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:59:27,502 INFO L470 AbstractCegarLoop]: Abstraction has 2761 states and 4134 transitions. [2021-11-12 23:59:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 4134 transitions. [2021-11-12 23:59:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:59:27,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:59:27,510 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:59:27,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:59:27,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:59:27,730 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:59:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:59:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 946113701, now seen corresponding path program 1 times [2021-11-12 23:59:27,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:59:27,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642740522] [2021-11-12 23:59:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:59:27,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:59:27,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:59:27,733 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:59:27,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:59:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:59:27,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:59:28,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 23:59:28,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 23:59:28,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:59:28,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642740522] [2021-11-12 23:59:28,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642740522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:59:28,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:59:28,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:59:28,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960365137] [2021-11-12 23:59:28,714 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:59:28,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:59:28,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:59:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:59:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:59:28,715 INFO L87 Difference]: Start difference. First operand 2761 states and 4134 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) [2021-11-12 23:59:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:59:28,887 INFO L93 Difference]: Finished difference Result 5489 states and 8232 transitions. [2021-11-12 23:59:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:59:28,887 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 128 [2021-11-12 23:59:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:59:28,898 INFO L225 Difference]: With dead ends: 5489 [2021-11-12 23:59:28,899 INFO L226 Difference]: Without dead ends: 2765 [2021-11-12 23:59:28,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:59:28,902 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.53ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:59:28,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 409 Invalid, 43 Unknown, 0 Unchecked, 0.53ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 77.09ms Time] [2021-11-12 23:59:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-11-12 23:59:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2765. [2021-11-12 23:59:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 1.4971056439942112) internal successors, (4138), 2764 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 4138 transitions. [2021-11-12 23:59:29,048 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 4138 transitions. Word has length 128 [2021-11-12 23:59:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:59:29,048 INFO L470 AbstractCegarLoop]: Abstraction has 2765 states and 4138 transitions. [2021-11-12 23:59:29,049 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) [2021-11-12 23:59:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 4138 transitions. [2021-11-12 23:59:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:59:29,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:59:29,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:59:29,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:59:29,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:59:29,272 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:59:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:59:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2135350117, now seen corresponding path program 1 times [2021-11-12 23:59:29,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:59:29,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021856498] [2021-11-12 23:59:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:59:29,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:59:29,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:59:29,274 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:59:29,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:59:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:59:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:59:29,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:29,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:59:30,144 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:59:30,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-12 23:59:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:59:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:59:30,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:59:30,569 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:59:30,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 23:59:33,046 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:59:33,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:59:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:59:33,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:59:34,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:59:34,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021856498] [2021-11-12 23:59:34,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021856498] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:59:34,369 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:59:34,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 23:59:34,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543130054] [2021-11-12 23:59:34,369 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:59:34,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:59:34,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:59:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:59:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:59:34,371 INFO L87 Difference]: Start difference. First operand 2765 states and 4138 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:36,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:41,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:42,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:47,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:50,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:59:50,192 INFO L93 Difference]: Finished difference Result 5902 states and 8811 transitions. [2021-11-12 23:59:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:59:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 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 131 [2021-11-12 23:59:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:59:50,198 INFO L225 Difference]: With dead ends: 5902 [2021-11-12 23:59:50,198 INFO L226 Difference]: Without dead ends: 3178 [2021-11-12 23:59:50,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:59:50,201 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 98 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15198.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.10ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15626.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:59:50,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 573 Invalid, 222 Unknown, 0 Unchecked, 2.10ms Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 3 Unknown, 0 Unchecked, 15626.89ms Time] [2021-11-12 23:59:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-11-12 23:59:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 3016. [2021-11-12 23:59:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 1.4935323383084578) internal successors, (4503), 3015 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 4503 transitions. [2021-11-12 23:59:50,346 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 4503 transitions. Word has length 131 [2021-11-12 23:59:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:59:50,347 INFO L470 AbstractCegarLoop]: Abstraction has 3016 states and 4503 transitions. [2021-11-12 23:59:50,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 4503 transitions. [2021-11-12 23:59:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:59:50,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:59:50,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:59:50,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:59:50,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:59:50,569 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:59:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:59:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1140656419, now seen corresponding path program 1 times [2021-11-12 23:59:50,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:59:50,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188997286] [2021-11-12 23:59:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:59:50,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:59:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:59:50,572 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:59:50,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:59:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:59:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:59:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:59:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:59:51,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:59:51,265 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 23:59:51,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-12 23:59:51,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:59:51,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:59:51,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:59:51,687 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:59:51,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-12 23:59:52,987 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:59:52,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-12 23:59:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:59:53,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:59:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:59:53,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:59:53,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188997286] [2021-11-12 23:59:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188997286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:59:53,966 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:59:53,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 23:59:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188640762] [2021-11-12 23:59:53,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:59:53,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:59:53,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:59:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:59:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:59:53,967 INFO L87 Difference]: Start difference. First operand 3016 states and 4503 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:59:55,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:59:58,005 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:04,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:09,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:12,678 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:00:14,231 INFO L93 Difference]: Finished difference Result 6210 states and 9263 transitions. [2021-11-13 00:00:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 00:00:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-13 00:00:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:00:14,238 INFO L225 Difference]: With dead ends: 6210 [2021-11-13 00:00:14,238 INFO L226 Difference]: Without dead ends: 3235 [2021-11-13 00:00:14,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 00:00:14,242 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 27 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19549.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20068.92ms IncrementalHoareTripleChecker+Time [2021-11-13 00:00:14,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 770 Invalid, 268 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 20068.92ms Time] [2021-11-13 00:00:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2021-11-13 00:00:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3157. [2021-11-13 00:00:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 1.4885931558935361) internal successors, (4698), 3156 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:00:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 4698 transitions. [2021-11-13 00:00:14,348 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 4698 transitions. Word has length 131 [2021-11-13 00:00:14,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:00:14,348 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 4698 transitions. [2021-11-13 00:00:14,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:00:14,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 4698 transitions. [2021-11-13 00:00:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-13 00:00:14,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:00:14,355 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 00:00:14,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-13 00:00:14,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:00:14,569 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:00:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:00:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 499824474, now seen corresponding path program 1 times [2021-11-13 00:00:14,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:00:14,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640331049] [2021-11-13 00:00:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:00:14,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:00:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:00:14,572 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:00:14,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 00:00:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:00:15,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 00:00:15,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:00:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:15,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:15,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:15,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:15,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:00:15,356 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 00:00:15,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 00:00:15,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:00:15,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:00:15,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:00:15,814 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 00:00:15,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 00:00:17,603 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 00:00:17,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 00:00:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 00:00:17,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:00:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 00:00:18,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:00:18,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640331049] [2021-11-13 00:00:18,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640331049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:00:18,315 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 00:00:18,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 00:00:18,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173319572] [2021-11-13 00:00:18,316 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:00:18,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 00:00:18,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:00:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 00:00:18,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 00:00:18,317 INFO L87 Difference]: Start difference. First operand 3157 states and 4698 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:00:20,346 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:22,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:27,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:36,766 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:37,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:00:45,814 INFO L93 Difference]: Finished difference Result 7147 states and 10580 transitions. [2021-11-13 00:00:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 00:00:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-13 00:00:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:00:45,824 INFO L225 Difference]: With dead ends: 7147 [2021-11-13 00:00:45,824 INFO L226 Difference]: Without dead ends: 4031 [2021-11-13 00:00:45,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 00:00:45,829 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 285 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26498.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27221.62ms IncrementalHoareTripleChecker+Time [2021-11-13 00:00:45,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 642 Invalid, 484 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [66 Valid, 416 Invalid, 2 Unknown, 0 Unchecked, 27221.62ms Time] [2021-11-13 00:00:45,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-11-13 00:00:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3334. [2021-11-13 00:00:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 1.4752475247524752) internal successors, (4917), 3333 states have internal predecessors, (4917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:00:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 4917 transitions. [2021-11-13 00:00:45,976 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 4917 transitions. Word has length 141 [2021-11-13 00:00:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:00:45,977 INFO L470 AbstractCegarLoop]: Abstraction has 3334 states and 4917 transitions. [2021-11-13 00:00:45,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:00:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 4917 transitions. [2021-11-13 00:00:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 00:00:45,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:00:45,984 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 00:00:46,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 00:00:46,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:00:46,206 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:00:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:00:46,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1754593456, now seen corresponding path program 1 times [2021-11-13 00:00:46,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:00:46,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639412484] [2021-11-13 00:00:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:00:46,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:00:46,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:00:46,209 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:00:46,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 00:00:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:00:46,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 00:00:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:00:46,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:46,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:00:46,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:00:46,935 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 00:00:46,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 00:00:47,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:00:47,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:00:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:00:47,371 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 00:00:47,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 00:00:49,205 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 00:00:49,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 00:00:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 00:00:49,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:00:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 00:00:49,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:00:49,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639412484] [2021-11-13 00:00:49,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639412484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:00:49,969 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 00:00:49,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 00:00:49,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562747938] [2021-11-13 00:00:49,969 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:00:49,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 00:00:49,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:00:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 00:00:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 00:00:49,971 INFO L87 Difference]: Start difference. First operand 3334 states and 4917 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:00:52,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:53,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:00:59,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:02,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:04,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:05,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:06,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:09,281 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:11,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:13,143 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:17,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:01:17,852 INFO L93 Difference]: Finished difference Result 7408 states and 10901 transitions. [2021-11-13 00:01:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 00:01:17,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 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 142 [2021-11-13 00:01:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:01:17,862 INFO L225 Difference]: With dead ends: 7408 [2021-11-13 00:01:17,863 INFO L226 Difference]: Without dead ends: 4115 [2021-11-13 00:01:17,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 00:01:17,867 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 279 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26855.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27579.10ms IncrementalHoareTripleChecker+Time [2021-11-13 00:01:17,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 573 Invalid, 475 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [72 Valid, 401 Invalid, 2 Unknown, 0 Unchecked, 27579.10ms Time] [2021-11-13 00:01:17,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-11-13 00:01:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 3436. [2021-11-13 00:01:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 1.4663755458515284) internal successors, (5037), 3435 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:01:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 5037 transitions. [2021-11-13 00:01:18,113 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 5037 transitions. Word has length 142 [2021-11-13 00:01:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:01:18,114 INFO L470 AbstractCegarLoop]: Abstraction has 3436 states and 5037 transitions. [2021-11-13 00:01:18,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:01:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 5037 transitions. [2021-11-13 00:01:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 00:01:18,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:01:18,120 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 00:01:18,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 00:01:18,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:01:18,343 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:01:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:01:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash -294869722, now seen corresponding path program 1 times [2021-11-13 00:01:18,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:01:18,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459388488] [2021-11-13 00:01:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:01:18,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:01:18,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:01:18,346 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:01:18,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 00:01:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:01:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 00:01:19,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:01:19,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:19,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:19,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:19,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:01:19,418 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 00:01:19,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 00:01:19,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:01:19,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:01:19,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:01:19,851 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 00:01:19,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 00:01:21,407 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 00:01:21,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 00:01:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 00:01:21,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:01:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 00:01:22,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:01:22,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459388488] [2021-11-13 00:01:22,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459388488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:01:22,220 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 00:01:22,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 00:01:22,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634653289] [2021-11-13 00:01:22,221 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:01:22,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 00:01:22,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:01:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 00:01:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 00:01:22,222 INFO L87 Difference]: Start difference. First operand 3436 states and 5037 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:01:24,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:26,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:35,714 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:42,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:43,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:46,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:48,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:53,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:57,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:01:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:01:57,585 INFO L93 Difference]: Finished difference Result 7699 states and 11246 transitions. [2021-11-13 00:01:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 00:01:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 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 144 [2021-11-13 00:01:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:01:57,596 INFO L225 Difference]: With dead ends: 7699 [2021-11-13 00:01:57,596 INFO L226 Difference]: Without dead ends: 4304 [2021-11-13 00:01:57,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 00:01:57,601 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 267 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 62 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34024.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35029.10ms IncrementalHoareTripleChecker+Time [2021-11-13 00:01:57,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 877 Invalid, 668 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [62 Valid, 603 Invalid, 3 Unknown, 0 Unchecked, 35029.10ms Time] [2021-11-13 00:01:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-11-13 00:01:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 3589. [2021-11-13 00:01:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3588 states have (on average 1.4531772575250836) internal successors, (5214), 3588 states have internal predecessors, (5214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:01:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 5214 transitions. [2021-11-13 00:01:57,851 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 5214 transitions. Word has length 144 [2021-11-13 00:01:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:01:57,851 INFO L470 AbstractCegarLoop]: Abstraction has 3589 states and 5214 transitions. [2021-11-13 00:01:57,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:01:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 5214 transitions. [2021-11-13 00:01:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 00:01:57,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:01:57,858 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-13 00:01:57,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 00:01:58,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:01:58,072 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:01:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:01:58,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2027154736, now seen corresponding path program 1 times [2021-11-13 00:01:58,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:01:58,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747778959] [2021-11-13 00:01:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:01:58,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:01:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:01:58,075 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:01:58,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 00:01:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:01:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 00:01:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:01:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:58,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:58,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:58,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:58,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:01:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:01:59,064 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 00:01:59,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 00:01:59,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:01:59,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:01:59,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:01:59,517 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 00:01:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 00:02:01,150 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 00:02:01,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 00:02:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 00:02:01,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:02:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 00:02:01,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:02:01,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747778959] [2021-11-13 00:02:01,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747778959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:02:01,952 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 00:02:01,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 00:02:01,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494176510] [2021-11-13 00:02:01,953 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:02:01,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 00:02:01,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:02:01,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 00:02:01,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 00:02:01,958 INFO L87 Difference]: Start difference. First operand 3589 states and 5214 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:02:04,005 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:06,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:14,282 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:17,182 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:22,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:24,471 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:25,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:27,925 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:31,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:33,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:02:35,960 INFO L93 Difference]: Finished difference Result 7804 states and 11315 transitions. [2021-11-13 00:02:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 00:02:35,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 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 145 [2021-11-13 00:02:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:02:35,972 INFO L225 Difference]: With dead ends: 7804 [2021-11-13 00:02:35,972 INFO L226 Difference]: Without dead ends: 4256 [2021-11-13 00:02:35,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 00:02:35,976 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 223 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 68 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32789.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33673.47ms IncrementalHoareTripleChecker+Time [2021-11-13 00:02:35,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 690 Invalid, 564 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [68 Valid, 492 Invalid, 4 Unknown, 0 Unchecked, 33673.47ms Time] [2021-11-13 00:02:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4256 states. [2021-11-13 00:02:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4256 to 3589. [2021-11-13 00:02:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3588 states have (on average 1.4381270903010033) internal successors, (5160), 3588 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:02:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 5160 transitions. [2021-11-13 00:02:36,228 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 5160 transitions. Word has length 145 [2021-11-13 00:02:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:02:36,228 INFO L470 AbstractCegarLoop]: Abstraction has 3589 states and 5160 transitions. [2021-11-13 00:02:36,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:02:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 5160 transitions. [2021-11-13 00:02:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 00:02:36,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:02:36,235 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 00:02:36,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-13 00:02:36,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:02:36,460 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:02:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:02:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash -258050517, now seen corresponding path program 1 times [2021-11-13 00:02:36,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:02:36,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440184323] [2021-11-13 00:02:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:02:36,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:02:36,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:02:36,462 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:02:36,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-13 00:02:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:02:36,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 00:02:36,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:02:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 00:02:37,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:02:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 00:02:37,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:02:37,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440184323] [2021-11-13 00:02:37,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440184323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:02:37,489 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 00:02:37,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 00:02:37,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001893504] [2021-11-13 00:02:37,490 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:02:37,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 00:02:37,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:02:37,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 00:02:37,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 00:02:37,491 INFO L87 Difference]: Start difference. First operand 3589 states and 5160 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:02:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:02:38,360 INFO L93 Difference]: Finished difference Result 9391 states and 13546 transitions. [2021-11-13 00:02:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 00:02:38,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 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 152 [2021-11-13 00:02:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:02:38,368 INFO L225 Difference]: With dead ends: 9391 [2021-11-13 00:02:38,368 INFO L226 Difference]: Without dead ends: 5843 [2021-11-13 00:02:38,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 00:02:38,373 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 315 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 636.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 679.29ms IncrementalHoareTripleChecker+Time [2021-11-13 00:02:38,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 719 Invalid, 175 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [55 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 679.29ms Time] [2021-11-13 00:02:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5843 states. [2021-11-13 00:02:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5843 to 5819. [2021-11-13 00:02:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 5818 states have (on average 1.4365761430044688) internal successors, (8358), 5818 states have internal predecessors, (8358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:02:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 8358 transitions. [2021-11-13 00:02:38,681 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 8358 transitions. Word has length 152 [2021-11-13 00:02:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:02:38,681 INFO L470 AbstractCegarLoop]: Abstraction has 5819 states and 8358 transitions. [2021-11-13 00:02:38,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:02:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 8358 transitions. [2021-11-13 00:02:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-13 00:02:38,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:02:38,689 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 00:02:38,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-13 00:02:38,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:02:38,908 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:02:38,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:02:38,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1147067013, now seen corresponding path program 1 times [2021-11-13 00:02:38,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:02:38,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271254832] [2021-11-13 00:02:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:02:38,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:02:38,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:02:38,913 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:02:38,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 00:02:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:02:39,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 00:02:39,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:02:39,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:02:39,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:02:39,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:02:39,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:02:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:02:39,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:02:39,631 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 00:02:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 00:02:39,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:02:39,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:02:39,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:02:40,039 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 00:02:40,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 00:02:41,293 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 00:02:41,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 00:02:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 00:02:41,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:02:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 00:02:42,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:02:42,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271254832] [2021-11-13 00:02:42,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271254832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:02:42,022 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 00:02:42,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 00:02:42,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399775375] [2021-11-13 00:02:42,022 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:02:42,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 00:02:42,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:02:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 00:02:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 00:02:42,023 INFO L87 Difference]: Start difference. First operand 5819 states and 8358 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:02:44,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:46,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:02:58,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:01,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:03,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:06,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:16,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 00:03:17,393 INFO L93 Difference]: Finished difference Result 12596 states and 18033 transitions. [2021-11-13 00:03:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 00:03:17,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-13 00:03:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 00:03:17,400 INFO L225 Difference]: With dead ends: 12596 [2021-11-13 00:03:17,400 INFO L226 Difference]: Without dead ends: 6818 [2021-11-13 00:03:17,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 00:03:17,404 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 226 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 66 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34040.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.24ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34999.22ms IncrementalHoareTripleChecker+Time [2021-11-13 00:03:17,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 875 Invalid, 688 Unknown, 0 Unchecked, 4.24ms Time], IncrementalHoareTripleChecker [66 Valid, 619 Invalid, 3 Unknown, 0 Unchecked, 34999.22ms Time] [2021-11-13 00:03:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6818 states. [2021-11-13 00:03:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6818 to 5819. [2021-11-13 00:03:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 5818 states have (on average 1.418013062908216) internal successors, (8250), 5818 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:03:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 8250 transitions. [2021-11-13 00:03:17,655 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 8250 transitions. Word has length 153 [2021-11-13 00:03:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 00:03:17,656 INFO L470 AbstractCegarLoop]: Abstraction has 5819 states and 8250 transitions. [2021-11-13 00:03:17,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:03:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 8250 transitions. [2021-11-13 00:03:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-13 00:03:17,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 00:03:17,662 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 00:03:17,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-13 00:03:17,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 00:03:17,881 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 00:03:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 00:03:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash 63181408, now seen corresponding path program 1 times [2021-11-13 00:03:17,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 00:03:17,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983615518] [2021-11-13 00:03:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 00:03:17,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 00:03:17,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 00:03:17,883 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 00:03:17,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cdc5524-9503-42ef-a561-2012327aee73/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-13 00:03:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 00:03:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 00:03:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 00:03:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:03:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:03:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:03:18,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:03:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 00:03:18,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:03:18,607 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-13 00:03:18,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-13 00:03:18,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:03:18,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:03:18,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 00:03:18,964 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-13 00:03:18,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-13 00:03:20,976 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-13 00:03:20,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-13 00:03:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 00:03:21,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 00:03:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 00:03:21,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 00:03:21,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983615518] [2021-11-13 00:03:21,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983615518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 00:03:21,791 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 00:03:21,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-13 00:03:21,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639241902] [2021-11-13 00:03:21,792 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 00:03:21,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 00:03:21,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 00:03:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 00:03:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 00:03:21,792 INFO L87 Difference]: Start difference. First operand 5819 states and 8250 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 00:03:23,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:25,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:43,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 00:03:45,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []