./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/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 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:28:58,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:28:58,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:28:58,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:28:58,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:28:58,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:28:58,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:28:58,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:28:58,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:28:58,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:28:58,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:28:58,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:28:58,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:28:58,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:28:58,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:28:58,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:28:58,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:28:58,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:28:58,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:28:58,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:28:58,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:28:58,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:28:58,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:28:58,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:28:58,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:28:58,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:28:58,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:28:58,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:28:58,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:28:58,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:28:58,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:28:58,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:28:58,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:28:58,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:28:58,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:28:58,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:28:58,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:28:58,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:28:58,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:28:58,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:28:58,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:28:58,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:28:58,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:28:58,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:28:58,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:28:58,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:28:58,720 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:28:58,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:28:58,721 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:28:58,721 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:28:58,722 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:28:58,722 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:28:58,723 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:28:58,724 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:28:58,724 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:28:58,724 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:28:58,725 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:28:58,725 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:28:58,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:28:58,726 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:28:58,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:28:58,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:28:58,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:28:58,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:28:58,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:28:58,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:28:58,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:28:58,728 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:28:58,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:28:58,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:28:58,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:28:58,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:28:58,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:28:58,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:28:58,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:28:58,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:28:58,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:28:58,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:28:58,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:28:58,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:28:58,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:28:58,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:28:58,735 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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-11-12 23:28:59,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:28:59,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:28:59,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:28:59,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:28:59,109 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:28:59,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-12 23:28:59,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data/6ebae3aa3/1748a8f45fed4b3cb67273a4c24aa1b8/FLAG17976a38c [2021-11-12 23:28:59,988 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:28:59,989 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-12 23:29:00,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data/6ebae3aa3/1748a8f45fed4b3cb67273a4c24aa1b8/FLAG17976a38c [2021-11-12 23:29:00,090 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data/6ebae3aa3/1748a8f45fed4b3cb67273a4c24aa1b8 [2021-11-12 23:29:00,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:29:00,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:29:00,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:29:00,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:29:00,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:29:00,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:29:00" (1/1) ... [2021-11-12 23:29:00,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736e8c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:00, skipping insertion in model container [2021-11-12 23:29:00,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:29:00" (1/1) ... [2021-11-12 23:29:00,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:29:00,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:29:00,872 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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-12 23:29:00,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:29:00,903 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 23:29:00,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@70dea45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:00, skipping insertion in model container [2021-11-12 23:29:00,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:29:00,904 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:29:00,907 INFO L158 Benchmark]: Toolchain (without parser) took 809.28ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 49.2MB in the beginning and 88.2MB in the end (delta: -39.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-12 23:29:00,909 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 88.1MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:29:00,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 803.18ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 48.9MB in the beginning and 88.2MB in the end (delta: -39.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-12 23:29:00,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 88.1MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 803.18ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 48.9MB in the beginning and 88.2MB in the end (delta: -39.3MB). Peak memory consumption was 4.2MB. 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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/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 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:29:03,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:29:03,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:29:03,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:29:03,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:29:03,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:29:03,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:29:03,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:29:03,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:29:03,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:29:03,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:29:03,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:29:03,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:29:03,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:29:03,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:29:03,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:29:03,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:29:03,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:29:03,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:29:03,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:29:03,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:29:03,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:29:03,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:29:03,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:29:03,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:29:03,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:29:03,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:29:03,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:29:03,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:29:03,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:29:03,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:29:03,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:29:03,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:29:03,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:29:03,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:29:03,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:29:03,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:29:03,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:29:03,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:29:03,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:29:03,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:29:03,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:29:03,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:29:03,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:29:04,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:29:04,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:29:04,001 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:29:04,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:29:04,001 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:29:04,002 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:29:04,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:29:04,002 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:29:04,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:29:04,006 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:29:04,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:29:04,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:29:04,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:29:04,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:29:04,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:29:04,007 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:29:04,008 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:29:04,008 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:29:04,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:29:04,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:29:04,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:29:04,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:29:04,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:29:04,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:29:04,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:29:04,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:29:04,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:29:04,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:29:04,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:29:04,012 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:29:04,012 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:04,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:29:04,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:29:04,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:29:04,013 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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-11-12 23:29:04,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:29:04,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:29:04,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:29:04,615 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:29:04,617 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:29:04,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-12 23:29:04,695 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data/2a43ebf28/243cd9f7fe9a4c2ba14535dc6f085ab9/FLAG08cfae4af [2021-11-12 23:29:05,444 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:29:05,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-11-12 23:29:05,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data/2a43ebf28/243cd9f7fe9a4c2ba14535dc6f085ab9/FLAG08cfae4af [2021-11-12 23:29:05,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/data/2a43ebf28/243cd9f7fe9a4c2ba14535dc6f085ab9 [2021-11-12 23:29:05,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:29:05,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:29:05,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:29:05,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:29:05,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:29:05,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:29:05" (1/1) ... [2021-11-12 23:29:05,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a12366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:05, skipping insertion in model container [2021-11-12 23:29:05,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:29:05" (1/1) ... [2021-11-12 23:29:05,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:29:05,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:29:06,397 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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-12 23:29:06,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:29:06,433 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:29:06,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:29:06,675 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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-12 23:29:06,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:29:06,696 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:29:06,828 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_8159e117-5f23-4451-9c24-5dbb0c5ff5da/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c[77378,77391] [2021-11-12 23:29:06,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:29:06,850 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:29:06,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06 WrapperNode [2021-11-12 23:29:06,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:29:06,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:29:06,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:29:06,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:29:06,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:06,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:06,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:29:06,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:29:06,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:29:06,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:29:06,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:06,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:06,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:06,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:07,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:07,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:07,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:07,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:29:07,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:29:07,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:29:07,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:29:07,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (1/1) ... [2021-11-12 23:29:07,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:29:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:29:07,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:29:07,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:29:07,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:29:07,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:29:07,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:29:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:29:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:29:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:29:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:29:07,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:29:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:29:07,512 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:29:18,583 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 23:29:18,583 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 23:29:18,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:29:18,593 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:29:18,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:18 BoogieIcfgContainer [2021-11-12 23:29:18,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:29:18,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:29:18,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:29:18,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:29:18,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:29:05" (1/3) ... [2021-11-12 23:29:18,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e575d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:29:18, skipping insertion in model container [2021-11-12 23:29:18,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:06" (2/3) ... [2021-11-12 23:29:18,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e575d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:29:18, skipping insertion in model container [2021-11-12 23:29:18,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:18" (3/3) ... [2021-11-12 23:29:18,606 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-1.c [2021-11-12 23:29:18,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:29:18,613 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:29:18,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:29:18,679 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 23:29:18,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:29:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 0 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 23:29:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 23:29:18,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:18,716 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] [2021-11-12 23:29:18,716 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777092, now seen corresponding path program 1 times [2021-11-12 23:29:18,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:18,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709965150] [2021-11-12 23:29:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:18,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:18,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:18,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:29:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:19,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:29:19,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:19,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 23:29:19,460 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 23:29:19,634 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:19,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:29:19,666 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:19,671 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 23:29:19,704 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 23:29:20,408 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 23:29:20,409 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 23:29:20,589 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:20,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:29:20,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:20,612 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 23:29:20,630 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 23:29:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:20,819 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-11-12 23:29:20,826 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 23:29:21,000 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 23:29:21,001 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 23:29:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:21,056 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 23:29:21,096 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 23:29:21,102 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 23:29:21,258 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 23:29:21,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:21,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:21,490 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 23:29:21,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:21,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:29:21,693 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:21,696 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-12 23:29:21,705 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:21,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-12 23:29:21,722 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:21,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-12 23:29:21,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:21,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-12 23:29:21,775 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:21,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-12 23:29:21,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:29:21,827 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-12 23:29:22,432 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 23:29:22,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:22,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709965150] [2021-11-12 23:29:22,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709965150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:22,434 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:22,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:29:22,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644796869] [2021-11-12 23:29:22,437 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:22,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:29:22,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:29:22,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:29:22,478 INFO L87 Difference]: Start difference. First operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 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 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:24,540 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 23:29:26,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:36,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:38,463 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 23:29:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:40,686 INFO L93 Difference]: Finished difference Result 317 states and 539 transitions. [2021-11-12 23:29:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:29:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-12 23:29:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:40,704 INFO L225 Difference]: With dead ends: 317 [2021-11-12 23:29:40,704 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 23:29:40,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:29:40,712 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 18 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17615.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.24ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 18025.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:40,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1355 Invalid, 249 Unknown, 0 Unchecked, 11.24ms Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 2 Unknown, 62 Unchecked, 18025.39ms Time] [2021-11-12 23:29:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 23:29:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 23:29:40,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5625) internal successors, (225), 144 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 23:29:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 225 transitions. [2021-11-12 23:29:40,768 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 225 transitions. Word has length 45 [2021-11-12 23:29:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:40,768 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 225 transitions. [2021-11-12 23:29:40,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 225 transitions. [2021-11-12 23:29:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-12 23:29:40,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:40,773 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] [2021-11-12 23:29:40,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:40,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:40,992 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:40,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1806796926, now seen corresponding path program 1 times [2021-11-12 23:29:40,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:40,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44100505] [2021-11-12 23:29:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:40,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:40,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:40,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:41,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:29:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:29:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:41,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:41,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:41,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:41,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:29:41,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:29:42,119 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:29:42,120 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 23:29:45,917 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:29:45,919 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 23:29:54,055 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:29:54,056 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 23:29:54,174 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 23:29:54,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:02,517 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 23:30:02,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:02,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44100505] [2021-11-12 23:30:02,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44100505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:02,518 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:02,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-12 23:30:02,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185955016] [2021-11-12 23:30:02,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:02,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:30:02,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:30:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-12 23:30:02,522 INFO L87 Difference]: Start difference. First operand 145 states and 225 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:04,552 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 23:30:09,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:11,795 WARN L515 Checker$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 23:30:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:12,427 INFO L93 Difference]: Finished difference Result 295 states and 461 transitions. [2021-11-12 23:30:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:30:12,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-12 23:30:12,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:12,432 INFO L225 Difference]: With dead ends: 295 [2021-11-12 23:30:12,432 INFO L226 Difference]: Without dead ends: 160 [2021-11-12 23:30:12,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 23:30:12,435 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 38 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9660.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 9880.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:12,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 534 Invalid, 107 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 2 Unknown, 18 Unchecked, 9880.37ms Time] [2021-11-12 23:30:12,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-12 23:30:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-11-12 23:30:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 23:30:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 244 transitions. [2021-11-12 23:30:12,455 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 244 transitions. Word has length 45 [2021-11-12 23:30:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:12,456 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 244 transitions. [2021-11-12 23:30:12,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 244 transitions. [2021-11-12 23:30:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:30:12,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:12,460 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] [2021-11-12 23:30:12,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:30:12,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:12,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:12,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:12,664 INFO L85 PathProgramCache]: Analyzing trace with hash 774668882, now seen corresponding path program 1 times [2021-11-12 23:30:12,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:12,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171989704] [2021-11-12 23:30:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:12,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:12,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:12,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:12,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:30:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:13,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:30:13,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:13,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:13,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:13,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:30:13,602 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:30:13,603 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 23:30:16,983 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:30:16,983 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 23:30:24,504 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:30:24,505 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 23:30:24,672 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 23:30:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:25,033 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 23:30:25,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:25,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171989704] [2021-11-12 23:30:25,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171989704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:25,034 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:25,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:30:25,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399228052] [2021-11-12 23:30:25,035 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:25,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:25,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:30:25,037 INFO L87 Difference]: Start difference. First operand 156 states and 244 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 23:30:27,072 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 23:30:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:30,881 INFO L93 Difference]: Finished difference Result 311 states and 487 transitions. [2021-11-12 23:30:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:30,882 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 58 [2021-11-12 23:30:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:30,885 INFO L225 Difference]: With dead ends: 311 [2021-11-12 23:30:30,885 INFO L226 Difference]: Without dead ends: 176 [2021-11-12 23:30:30,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 23:30:30,887 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 38 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5661.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.52ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 5821.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:30,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 902 Invalid, 230 Unknown, 0 Unchecked, 3.52ms Time], IncrementalHoareTripleChecker [27 Valid, 96 Invalid, 1 Unknown, 106 Unchecked, 5821.58ms Time] [2021-11-12 23:30:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-12 23:30:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2021-11-12 23:30:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5730994152046784) internal successors, (269), 171 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 23:30:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 269 transitions. [2021-11-12 23:30:30,906 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 269 transitions. Word has length 58 [2021-11-12 23:30:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:30,906 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 269 transitions. [2021-11-12 23:30:30,907 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 23:30:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 269 transitions. [2021-11-12 23:30:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:30:30,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:30,910 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] [2021-11-12 23:30:30,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:31,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:31,126 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash -713896793, now seen corresponding path program 1 times [2021-11-12 23:30:31,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:31,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665731413] [2021-11-12 23:30:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:31,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:31,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:31,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:31,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:30:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:31,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:30:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:31,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:31,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:31,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:31,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:31,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:31,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:30:32,108 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:30:32,109 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 23:30:35,590 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:30:35,590 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 23:30:42,474 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:30:42,475 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 23:30:42,660 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 23:30:42,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:43,021 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 23:30:43,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:43,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665731413] [2021-11-12 23:30:43,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665731413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:43,023 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:43,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:30:43,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382155833] [2021-11-12 23:30:43,023 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:43,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:43,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:30:43,030 INFO L87 Difference]: Start difference. First operand 172 states and 269 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:43,660 INFO L93 Difference]: Finished difference Result 323 states and 507 transitions. [2021-11-12 23:30:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:30:43,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 23:30:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:43,663 INFO L225 Difference]: With dead ends: 323 [2021-11-12 23:30:43,663 INFO L226 Difference]: Without dead ends: 172 [2021-11-12 23:30:43,664 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 23:30:43,666 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 10 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 605.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 616.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:43,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 676 Invalid, 105 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 616.64ms Time] [2021-11-12 23:30:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-12 23:30:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-11-12 23:30:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.567251461988304) internal successors, (268), 171 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 23:30:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 268 transitions. [2021-11-12 23:30:43,682 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 268 transitions. Word has length 59 [2021-11-12 23:30:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:43,683 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 268 transitions. [2021-11-12 23:30:43,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 268 transitions. [2021-11-12 23:30:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:30:43,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:43,686 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] [2021-11-12 23:30:43,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:43,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:43,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1173006651, now seen corresponding path program 1 times [2021-11-12 23:30:43,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:43,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264148952] [2021-11-12 23:30:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:43,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:43,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:43,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:30:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:44,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:30:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:44,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:44,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:44,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:44,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:44,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:30:44,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:30:44,904 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:30:44,905 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 23:30:48,385 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:30:48,386 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 23:30:55,313 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:30:55,314 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 23:30:55,476 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 23:30:55,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:55,743 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 23:30:55,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:55,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264148952] [2021-11-12 23:30:55,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264148952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:55,743 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:55,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:30:55,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302069530] [2021-11-12 23:30:55,744 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:55,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:30:55,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:55,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:30:55,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:30:55,746 INFO L87 Difference]: Start difference. First operand 172 states and 268 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 23:30:57,774 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 23:31:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:01,275 INFO L93 Difference]: Finished difference Result 358 states and 558 transitions. [2021-11-12 23:31:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:01,277 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 59 [2021-11-12 23:31:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:01,279 INFO L225 Difference]: With dead ends: 358 [2021-11-12 23:31:01,279 INFO L226 Difference]: Without dead ends: 207 [2021-11-12 23:31:01,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 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 23:31:01,281 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 28 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5291.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.92ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 5504.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:01,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1012 Invalid, 374 Unknown, 0 Unchecked, 3.92ms Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 1 Unknown, 219 Unchecked, 5504.01ms Time] [2021-11-12 23:31:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-12 23:31:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2021-11-12 23:31:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.5538461538461539) internal successors, (303), 195 states have internal predecessors, (303), 0 states have call successors, (0), 0 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 23:31:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 303 transitions. [2021-11-12 23:31:01,302 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 303 transitions. Word has length 59 [2021-11-12 23:31:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:01,302 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 303 transitions. [2021-11-12 23:31:01,302 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 23:31:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 303 transitions. [2021-11-12 23:31:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:31:01,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:01,306 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] [2021-11-12 23:31:01,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:01,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:01,519 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 320889874, now seen corresponding path program 1 times [2021-11-12 23:31:01,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:01,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862617316] [2021-11-12 23:31:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:01,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:01,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:01,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:31:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:01,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:31:01,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:01,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:01,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:31:02,348 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:31:02,348 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-12 23:31:05,794 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:31:05,795 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 23:31:13,442 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:31:13,443 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 23:31:13,603 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 23:31:13,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:13,997 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 23:31:13,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:13,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862617316] [2021-11-12 23:31:13,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862617316] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:13,998 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:13,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:31:13,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845114632] [2021-11-12 23:31:13,999 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:13,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:31:14,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:31:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:31:14,001 INFO L87 Difference]: Start difference. First operand 196 states and 303 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 23:31:16,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:20,339 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:20,406 INFO L93 Difference]: Finished difference Result 382 states and 594 transitions. [2021-11-12 23:31:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:20,409 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 59 [2021-11-12 23:31:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:20,411 INFO L225 Difference]: With dead ends: 382 [2021-11-12 23:31:20,411 INFO L226 Difference]: Without dead ends: 207 [2021-11-12 23:31:20,412 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 23:31:20,413 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 46 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6225.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 6384.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:20,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 738 Invalid, 172 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [29 Valid, 95 Invalid, 1 Unknown, 47 Unchecked, 6384.85ms Time] [2021-11-12 23:31:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-12 23:31:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 202. [2021-11-12 23:31:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5572139303482586) internal successors, (313), 201 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 23:31:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 313 transitions. [2021-11-12 23:31:20,427 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 313 transitions. Word has length 59 [2021-11-12 23:31:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:20,428 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 313 transitions. [2021-11-12 23:31:20,428 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 23:31:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 313 transitions. [2021-11-12 23:31:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:31:20,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:20,431 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] [2021-11-12 23:31:20,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:20,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:20,649 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1682330414, now seen corresponding path program 1 times [2021-11-12 23:31:20,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:20,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412025257] [2021-11-12 23:31:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:20,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:20,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:20,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:20,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:31:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:21,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:31:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:21,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:21,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:21,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:21,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:31:21,543 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:31:21,544 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 23:31:24,891 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:31:24,891 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 23:31:32,255 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:31:32,256 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 23:31:32,399 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 23:31:32,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:32,710 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 23:31:32,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:32,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412025257] [2021-11-12 23:31:32,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412025257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:32,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:32,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:31:32,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125152842] [2021-11-12 23:31:32,711 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:32,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:31:32,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:32,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:31:32,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:31:32,712 INFO L87 Difference]: Start difference. First operand 202 states and 313 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 23:31:34,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:38,041 WARN L515 Checker$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 23:31:39,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:41,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:41,424 INFO L93 Difference]: Finished difference Result 405 states and 630 transitions. [2021-11-12 23:31:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:41,426 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 59 [2021-11-12 23:31:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:41,428 INFO L225 Difference]: With dead ends: 405 [2021-11-12 23:31:41,428 INFO L226 Difference]: Without dead ends: 224 [2021-11-12 23:31:41,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 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 23:31:41,430 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 35 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8507.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 8691.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:41,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 840 Invalid, 243 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [29 Valid, 100 Invalid, 2 Unknown, 112 Unchecked, 8691.93ms Time] [2021-11-12 23:31:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-12 23:31:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2021-11-12 23:31:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.5504587155963303) internal successors, (338), 218 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 23:31:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 338 transitions. [2021-11-12 23:31:41,457 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 338 transitions. Word has length 59 [2021-11-12 23:31:41,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:41,457 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 338 transitions. [2021-11-12 23:31:41,457 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 23:31:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 338 transitions. [2021-11-12 23:31:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:31:41,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:41,464 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] [2021-11-12 23:31:41,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:41,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:41,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1666972293, now seen corresponding path program 1 times [2021-11-12 23:31:41,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:41,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846184968] [2021-11-12 23:31:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:41,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:41,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:41,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:31:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:42,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:31:42,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:42,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:42,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:42,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:31:42,575 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:31:42,575 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 23:31:45,876 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:31:45,877 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 23:31:52,956 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:31:52,957 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 23:31:53,133 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 23:31:53,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:53,458 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 23:31:53,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:53,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846184968] [2021-11-12 23:31:53,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846184968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:53,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:53,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:31:53,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583434291] [2021-11-12 23:31:53,459 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:53,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:31:53,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:31:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:31:53,460 INFO L87 Difference]: Start difference. First operand 219 states and 338 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:55,482 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 23:31:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:59,119 INFO L93 Difference]: Finished difference Result 429 states and 665 transitions. [2021-11-12 23:31:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 23:31:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:59,123 INFO L225 Difference]: With dead ends: 429 [2021-11-12 23:31:59,124 INFO L226 Difference]: Without dead ends: 231 [2021-11-12 23:31:59,124 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 23:31:59,125 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 35 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5430.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 5640.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:59,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 777 Invalid, 198 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [30 Valid, 123 Invalid, 1 Unknown, 44 Unchecked, 5640.70ms Time] [2021-11-12 23:31:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-12 23:31:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2021-11-12 23:31:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.5342465753424657) internal successors, (336), 219 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 23:31:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 336 transitions. [2021-11-12 23:31:59,138 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 336 transitions. Word has length 60 [2021-11-12 23:31:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:59,139 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 336 transitions. [2021-11-12 23:31:59,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 336 transitions. [2021-11-12 23:31:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:31:59,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:59,144 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] [2021-11-12 23:31:59,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:59,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:59,361 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1752756352, now seen corresponding path program 1 times [2021-11-12 23:31:59,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:59,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550073557] [2021-11-12 23:31:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:59,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:59,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:59,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:31:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:59,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:31:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:59,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:59,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:59,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:31:59,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:00,217 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:32:00,217 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 23:32:03,496 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:32:03,497 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 23:32:10,517 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:32:10,518 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 23:32:10,684 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 23:32:10,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:10,966 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 23:32:10,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:10,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550073557] [2021-11-12 23:32:10,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550073557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:10,967 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:10,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:32:10,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985376293] [2021-11-12 23:32:10,967 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:10,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:32:10,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:32:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:32:10,968 INFO L87 Difference]: Start difference. First operand 220 states and 336 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 23:32:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:12,157 INFO L93 Difference]: Finished difference Result 419 states and 646 transitions. [2021-11-12 23:32:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:32:12,158 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 61 [2021-11-12 23:32:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:12,161 INFO L225 Difference]: With dead ends: 419 [2021-11-12 23:32:12,161 INFO L226 Difference]: Without dead ends: 220 [2021-11-12 23:32:12,162 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 23:32:12,163 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 10 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1155.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1178.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:12,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 885 Invalid, 108 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 101 Unchecked, 1178.35ms Time] [2021-11-12 23:32:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-12 23:32:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-12 23:32:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.5296803652968036) internal successors, (335), 219 states have internal predecessors, (335), 0 states have call successors, (0), 0 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 23:32:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 335 transitions. [2021-11-12 23:32:12,175 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 335 transitions. Word has length 61 [2021-11-12 23:32:12,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:12,176 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 335 transitions. [2021-11-12 23:32:12,176 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 23:32:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 335 transitions. [2021-11-12 23:32:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:32:12,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:12,178 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] [2021-11-12 23:32:12,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-12 23:32:12,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:12,397 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1654924640, now seen corresponding path program 1 times [2021-11-12 23:32:12,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:12,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121251912] [2021-11-12 23:32:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:12,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:12,399 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:12,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:32:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:12,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:32:12,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:12,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:12,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:12,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:13,276 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-12 23:32:13,276 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 23:32:16,583 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-12 23:32:16,583 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 23:32:23,691 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-12 23:32:23,691 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 23:32:23,831 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 23:32:23,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:24,120 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 23:32:24,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:24,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121251912] [2021-11-12 23:32:24,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121251912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:24,121 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:24,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:32:24,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247553866] [2021-11-12 23:32:24,122 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:24,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:32:24,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:24,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:32:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:32:24,124 INFO L87 Difference]: Start difference. First operand 220 states and 335 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 23:32:26,160 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 23:32:31,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:32,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:32,930 INFO L93 Difference]: Finished difference Result 430 states and 659 transitions. [2021-11-12 23:32:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:32:32,933 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 62 [2021-11-12 23:32:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:32,936 INFO L225 Difference]: With dead ends: 430 [2021-11-12 23:32:32,936 INFO L226 Difference]: Without dead ends: 231 [2021-11-12 23:32:32,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 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 23:32:32,938 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 31 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8564.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 8781.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:32,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 959 Invalid, 373 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [35 Valid, 121 Invalid, 1 Unknown, 216 Unchecked, 8781.41ms Time] [2021-11-12 23:32:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-12 23:32:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2021-11-12 23:32:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.5114155251141552) internal successors, (331), 219 states have internal predecessors, (331), 0 states have call successors, (0), 0 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 23:32:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 331 transitions. [2021-11-12 23:32:32,950 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 331 transitions. Word has length 62 [2021-11-12 23:32:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:32,951 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 331 transitions. [2021-11-12 23:32:32,951 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 23:32:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 331 transitions. [2021-11-12 23:32:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:32:32,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:32,953 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] [2021-11-12 23:32:32,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:33,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:33,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1043051208, now seen corresponding path program 1 times [2021-11-12 23:32:33,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:33,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823546756] [2021-11-12 23:32:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:33,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:33,160 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:33,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:32:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:32:33,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:33,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:33,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:33,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:33,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:33,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:33,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:34,065 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:32:34,066 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 23:32:35,175 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:32:35,176 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 23:32:35,249 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 23:32:35,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:35,512 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 23:32:35,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:35,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823546756] [2021-11-12 23:32:35,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823546756] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:35,513 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:35,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:32:35,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013951727] [2021-11-12 23:32:35,513 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:35,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:32:35,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:32:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:32:35,515 INFO L87 Difference]: Start difference. First operand 220 states and 331 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 23:32:37,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:43,258 WARN L515 Checker$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 23:32:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:46,931 INFO L93 Difference]: Finished difference Result 459 states and 695 transitions. [2021-11-12 23:32:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:32:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 62 [2021-11-12 23:32:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:46,935 INFO L225 Difference]: With dead ends: 459 [2021-11-12 23:32:46,936 INFO L226 Difference]: Without dead ends: 260 [2021-11-12 23:32:46,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 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 23:32:46,937 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 56 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11028.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11328.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:46,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 543 Invalid, 177 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [16 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 11328.71ms Time] [2021-11-12 23:32:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-12 23:32:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 242. [2021-11-12 23:32:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.5062240663900415) internal successors, (363), 241 states have internal predecessors, (363), 0 states have call successors, (0), 0 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 23:32:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 363 transitions. [2021-11-12 23:32:46,952 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 363 transitions. Word has length 62 [2021-11-12 23:32:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:46,953 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 363 transitions. [2021-11-12 23:32:46,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 23:32:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 363 transitions. [2021-11-12 23:32:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 23:32:46,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:46,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2021-11-12 23:32:46,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 23:32:47,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:47,173 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:47,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1018679951, now seen corresponding path program 1 times [2021-11-12 23:32:47,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:47,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346232675] [2021-11-12 23:32:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:47,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:47,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:47,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:32:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:47,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:32:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:47,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:32:47,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:47,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:47,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:47,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:47,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:32:48,377 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:32:48,382 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 23:32:48,770 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:32:48,771 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 23:32:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:48,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:49,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:49,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346232675] [2021-11-12 23:32:49,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346232675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:49,155 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:49,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:32:49,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611414756] [2021-11-12 23:32:49,156 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:49,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:32:49,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:49,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:32:49,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:32:49,157 INFO L87 Difference]: Start difference. First operand 242 states and 363 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:32:51,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:53,201 WARN L515 Checker$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 23:33:00,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:01,606 WARN L515 Checker$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 23:33:03,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:08,602 WARN L515 Checker$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 23:33:13,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:18,319 WARN L515 Checker$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 23:33:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:18,730 INFO L93 Difference]: Finished difference Result 603 states and 915 transitions. [2021-11-12 23:33:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:33:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-12 23:33:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:18,735 INFO L225 Difference]: With dead ends: 603 [2021-11-12 23:33:18,735 INFO L226 Difference]: Without dead ends: 382 [2021-11-12 23:33:18,736 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 23:33:18,736 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 201 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28735.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.73ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29440.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:18,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 655 Invalid, 547 Unknown, 0 Unchecked, 3.73ms Time], IncrementalHoareTripleChecker [68 Valid, 476 Invalid, 3 Unknown, 0 Unchecked, 29440.17ms Time] [2021-11-12 23:33:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-12 23:33:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 253. [2021-11-12 23:33:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 0 states have call successors, (0), 0 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 23:33:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 375 transitions. [2021-11-12 23:33:18,750 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 375 transitions. Word has length 76 [2021-11-12 23:33:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:18,750 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 375 transitions. [2021-11-12 23:33:18,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 375 transitions. [2021-11-12 23:33:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:33:18,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:18,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-12 23:33:18,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:18,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:18,953 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:18,954 INFO L85 PathProgramCache]: Analyzing trace with hash 913917642, now seen corresponding path program 1 times [2021-11-12 23:33:18,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:18,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142375307] [2021-11-12 23:33:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:18,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:18,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:18,956 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:18,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:33:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:33:19,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:19,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:19,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:19,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:19,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:19,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:20,193 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:33:20,194 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 23:33:20,789 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:33:20,790 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 23:33:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:20,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:21,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:21,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142375307] [2021-11-12 23:33:21,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142375307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:21,194 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:21,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:33:21,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032761886] [2021-11-12 23:33:21,195 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:21,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:33:21,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:21,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:33:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:33:21,196 INFO L87 Difference]: Start difference. First operand 253 states and 375 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 23:33:23,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:29,595 WARN L515 Checker$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 23:33:31,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:37,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:40,841 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:42,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:44,113 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 23:33:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:45,149 INFO L93 Difference]: Finished difference Result 589 states and 885 transitions. [2021-11-12 23:33:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:33:45,151 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 78 [2021-11-12 23:33:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:45,154 INFO L225 Difference]: With dead ends: 589 [2021-11-12 23:33:45,154 INFO L226 Difference]: Without dead ends: 357 [2021-11-12 23:33:45,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 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 23:33:45,155 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 183 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23151.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.43ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23818.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:45,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 648 Invalid, 511 Unknown, 0 Unchecked, 3.43ms Time], IncrementalHoareTripleChecker [58 Valid, 451 Invalid, 2 Unknown, 0 Unchecked, 23818.81ms Time] [2021-11-12 23:33:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-12 23:33:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 254. [2021-11-12 23:33:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.4743083003952568) internal successors, (373), 253 states have internal predecessors, (373), 0 states have call successors, (0), 0 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 23:33:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 373 transitions. [2021-11-12 23:33:45,169 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 373 transitions. Word has length 78 [2021-11-12 23:33:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:45,170 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 373 transitions. [2021-11-12 23:33:45,170 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 23:33:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 373 transitions. [2021-11-12 23:33:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:33:45,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:45,172 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] [2021-11-12 23:33:45,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:45,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:45,392 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash -970686709, now seen corresponding path program 1 times [2021-11-12 23:33:45,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:45,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225947989] [2021-11-12 23:33:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:45,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:45,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:45,394 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:45,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:33:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:45,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:45,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:45,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:45,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:45,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:33:45,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:46,009 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:33:46,010 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 23:33:46,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:46,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:46,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:33:46,422 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:33:46,423 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 23:33:48,709 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:33:48,709 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 23:33:48,743 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 23:33:48,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:49,176 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 23:33:49,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:49,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225947989] [2021-11-12 23:33:49,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225947989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:49,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:33:49,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:33:49,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347851256] [2021-11-12 23:33:49,178 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:49,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:33:49,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:49,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:33:49,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:33:49,180 INFO L87 Difference]: Start difference. First operand 254 states and 373 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 23:33:51,215 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 23:33:53,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:02,547 WARN L515 Checker$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 23:34:06,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:07,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:12,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:13,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:16,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:19,136 INFO L93 Difference]: Finished difference Result 726 states and 1087 transitions. [2021-11-12 23:34:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:34:19,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-12 23:34:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:19,140 INFO L225 Difference]: With dead ends: 726 [2021-11-12 23:34:19,140 INFO L226 Difference]: Without dead ends: 493 [2021-11-12 23:34:19,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 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 23:34:19,142 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 350 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 80 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29105.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.62ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29818.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:19,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 596 Invalid, 497 Unknown, 0 Unchecked, 3.62ms Time], IncrementalHoareTripleChecker [80 Valid, 414 Invalid, 3 Unknown, 0 Unchecked, 29818.35ms Time] [2021-11-12 23:34:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-12 23:34:19,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 308. [2021-11-12 23:34:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.498371335504886) internal successors, (460), 307 states have internal predecessors, (460), 0 states have call successors, (0), 0 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 23:34:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 460 transitions. [2021-11-12 23:34:19,160 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 460 transitions. Word has length 84 [2021-11-12 23:34:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:19,161 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 460 transitions. [2021-11-12 23:34:19,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 23:34:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 460 transitions. [2021-11-12 23:34:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:34:19,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:19,163 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 23:34:19,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:19,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:19,378 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:19,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:19,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1086434060, now seen corresponding path program 1 times [2021-11-12 23:34:19,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:19,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675172742] [2021-11-12 23:34:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:19,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:19,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:19,382 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:19,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:34:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:34:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:20,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:20,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:20,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:20,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:20,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:34:20,118 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:34:20,118 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 23:34:20,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:34:20,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:34:20,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:34:20,536 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:34:20,536 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 23:34:22,875 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:34:22,876 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 23:34:22,914 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 23:34:22,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:23,334 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 23:34:23,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:23,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675172742] [2021-11-12 23:34:23,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675172742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:34:23,335 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:34:23,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:34:23,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833311299] [2021-11-12 23:34:23,335 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:23,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:34:23,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:23,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:34:23,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:34:23,336 INFO L87 Difference]: Start difference. First operand 308 states and 460 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 23:34:25,362 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 23:34:35,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:39,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:40,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:42,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:44,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:47,828 WARN L515 Checker$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 23:34:51,628 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:53,642 WARN L515 Checker$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 23:34:55,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:56,609 WARN L515 Checker$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 23:34:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:58,136 INFO L93 Difference]: Finished difference Result 799 states and 1209 transitions. [2021-11-12 23:34:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:34:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 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 23:34:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:58,142 INFO L225 Difference]: With dead ends: 799 [2021-11-12 23:34:58,142 INFO L226 Difference]: Without dead ends: 512 [2021-11-12 23:34:58,143 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 23:34:58,144 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 390 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 81 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33847.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.04ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34656.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:58,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 777 Invalid, 600 Unknown, 0 Unchecked, 4.04ms Time], IncrementalHoareTripleChecker [81 Valid, 516 Invalid, 3 Unknown, 0 Unchecked, 34656.09ms Time] [2021-11-12 23:34:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-12 23:34:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 337. [2021-11-12 23:34:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.5178571428571428) internal successors, (510), 336 states have internal predecessors, (510), 0 states have call successors, (0), 0 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 23:34:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 510 transitions. [2021-11-12 23:34:58,162 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 510 transitions. Word has length 85 [2021-11-12 23:34:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:58,163 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 510 transitions. [2021-11-12 23:34:58,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 23:34:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 510 transitions. [2021-11-12 23:34:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:34:58,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:58,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:34:58,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 23:34:58,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:58,385 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1060016578, now seen corresponding path program 1 times [2021-11-12 23:34:58,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:58,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463893950] [2021-11-12 23:34:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:58,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:58,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:58,389 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:58,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:34:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:59,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:34:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:59,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:59,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:59,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:59,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:59,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:34:59,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:34:59,245 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:34:59,246 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 23:34:59,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:34:59,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:34:59,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:34:59,627 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:34:59,627 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 23:35:01,333 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:35:01,334 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 23:35:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:35:01,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:35:01,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:01,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463893950] [2021-11-12 23:35:01,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463893950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:01,909 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:01,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:35:01,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709938853] [2021-11-12 23:35:01,910 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:01,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:35:01,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:01,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:35:01,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:01,911 INFO L87 Difference]: Start difference. First operand 337 states and 510 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:35:03,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:10,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:14,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:16,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:20,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:21,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:22,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:24,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:28,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:33,988 WARN L515 Checker$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 23:35:36,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:37,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:38,173 INFO L93 Difference]: Finished difference Result 891 states and 1367 transitions. [2021-11-12 23:35:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:35:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-12 23:35:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:38,178 INFO L225 Difference]: With dead ends: 891 [2021-11-12 23:35:38,179 INFO L226 Difference]: Without dead ends: 575 [2021-11-12 23:35:38,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 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 23:35:38,180 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 328 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35272.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.03ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36118.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:38,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 660 Invalid, 572 Unknown, 0 Unchecked, 4.03ms Time], IncrementalHoareTripleChecker [75 Valid, 495 Invalid, 2 Unknown, 0 Unchecked, 36118.02ms Time] [2021-11-12 23:35:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-12 23:35:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 379. [2021-11-12 23:35:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.529100529100529) internal successors, (578), 378 states have internal predecessors, (578), 0 states have call successors, (0), 0 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 23:35:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 578 transitions. [2021-11-12 23:35:38,201 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 578 transitions. Word has length 111 [2021-11-12 23:35:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:38,202 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 578 transitions. [2021-11-12 23:35:38,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:35:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 578 transitions. [2021-11-12 23:35:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:35:38,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:38,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:35:38,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:38,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:38,425 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1369047964, now seen corresponding path program 1 times [2021-11-12 23:35:38,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:38,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085942913] [2021-11-12 23:35:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:38,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:38,428 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:38,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:35:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:38,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:35:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:35:39,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:35:39,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:35:39,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:35:39,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:35:39,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:35:39,153 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:35:39,153 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 23:35:39,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:35:39,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:35:39,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:35:39,600 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:35:39,600 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 23:35:41,355 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:35:41,356 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 23:35:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:35:41,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:35:41,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:41,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085942913] [2021-11-12 23:35:41,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085942913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:41,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:41,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:35:41,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168405671] [2021-11-12 23:35:41,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:41,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:35:41,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:35:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:41,950 INFO L87 Difference]: Start difference. First operand 379 states and 578 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:35:44,004 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:56,763 WARN L515 Checker$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 23:35:57,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:00,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:03,330 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:05,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:07,883 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:09,369 WARN L515 Checker$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 23:36:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:14,019 INFO L93 Difference]: Finished difference Result 921 states and 1411 transitions. [2021-11-12 23:36:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:36:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-12 23:36:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:14,024 INFO L225 Difference]: With dead ends: 921 [2021-11-12 23:36:14,025 INFO L226 Difference]: Without dead ends: 563 [2021-11-12 23:36:14,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 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 23:36:14,027 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 341 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31078.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.21ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31924.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:14,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 816 Invalid, 618 Unknown, 0 Unchecked, 4.21ms Time], IncrementalHoareTripleChecker [80 Valid, 537 Invalid, 1 Unknown, 0 Unchecked, 31924.85ms Time] [2021-11-12 23:36:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-12 23:36:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 380. [2021-11-12 23:36:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.5224274406332454) internal successors, (577), 379 states have internal predecessors, (577), 0 states have call successors, (0), 0 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 23:36:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 577 transitions. [2021-11-12 23:36:14,047 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 577 transitions. Word has length 112 [2021-11-12 23:36:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:14,048 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 577 transitions. [2021-11-12 23:36:14,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:36:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 577 transitions. [2021-11-12 23:36:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:36:14,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:14,050 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] [2021-11-12 23:36:14,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-12 23:36:14,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:14,271 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash -400637440, now seen corresponding path program 1 times [2021-11-12 23:36:14,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:14,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627524339] [2021-11-12 23:36:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:14,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:14,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:14,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:14,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:36:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:14,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:36:14,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:14,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:14,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:14,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:36:15,012 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:36:15,013 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 23:36:15,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:36:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:36:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:36:15,419 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:36:15,420 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 23:36:17,288 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:36:17,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-12 23:36:17,415 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 23:36:17,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:17,881 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 23:36:17,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:17,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627524339] [2021-11-12 23:36:17,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627524339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:17,882 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:17,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:36:17,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893588532] [2021-11-12 23:36:17,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:17,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:36:17,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:36:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:36:17,884 INFO L87 Difference]: Start difference. First operand 380 states and 577 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) [2021-11-12 23:36:19,911 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:22,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:31,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:35,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:38,836 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:40,852 WARN L515 Checker$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 23:36:43,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:48,499 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:48,499 INFO L93 Difference]: Finished difference Result 947 states and 1450 transitions. [2021-11-12 23:36:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:36:48,516 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 113 [2021-11-12 23:36:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:48,519 INFO L225 Difference]: With dead ends: 947 [2021-11-12 23:36:48,519 INFO L226 Difference]: Without dead ends: 588 [2021-11-12 23:36:48,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 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 23:36:48,520 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 280 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29662.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.79ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30468.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:48,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 792 Invalid, 573 Unknown, 0 Unchecked, 3.79ms Time], IncrementalHoareTripleChecker [53 Valid, 518 Invalid, 2 Unknown, 0 Unchecked, 30468.27ms Time] [2021-11-12 23:36:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-12 23:36:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 430. [2021-11-12 23:36:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.5244755244755244) internal successors, (654), 429 states have internal predecessors, (654), 0 states have call successors, (0), 0 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 23:36:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 654 transitions. [2021-11-12 23:36:48,541 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 654 transitions. Word has length 113 [2021-11-12 23:36:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:48,542 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 654 transitions. [2021-11-12 23:36:48,542 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) [2021-11-12 23:36:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 654 transitions. [2021-11-12 23:36:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:36:48,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:48,552 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] [2021-11-12 23:36:48,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-12 23:36:48,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:48,773 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:48,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1898698953, now seen corresponding path program 1 times [2021-11-12 23:36:48,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:48,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404274117] [2021-11-12 23:36:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:48,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:48,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:48,777 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:48,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:36:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:36:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:49,500 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 23:36:49,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:49,933 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 23:36:49,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:49,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404274117] [2021-11-12 23:36:49,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404274117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:49,934 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:49,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:36:49,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990415656] [2021-11-12 23:36:49,934 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:49,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:36:49,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:36:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:36:49,936 INFO L87 Difference]: Start difference. First operand 430 states and 654 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:36:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:50,967 INFO L93 Difference]: Finished difference Result 1617 states and 2486 transitions. [2021-11-12 23:36:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-12 23:36:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:50,974 INFO L225 Difference]: With dead ends: 1617 [2021-11-12 23:36:50,974 INFO L226 Difference]: Without dead ends: 1208 [2021-11-12 23:36:50,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 234 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 23:36:50,975 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 319 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 950.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 991.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:50,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 611 Invalid, 142 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [51 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 991.17ms Time] [2021-11-12 23:36:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-11-12 23:36:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1200. [2021-11-12 23:36:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 1.524603836530442) internal successors, (1828), 1199 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 23:36:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1828 transitions. [2021-11-12 23:36:51,033 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1828 transitions. Word has length 119 [2021-11-12 23:36:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:51,034 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1828 transitions. [2021-11-12 23:36:51,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:36:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1828 transitions. [2021-11-12 23:36:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:36:51,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:51,038 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, 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 23:36:51,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:51,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:51,257 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1972621621, now seen corresponding path program 1 times [2021-11-12 23:36:51,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:51,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325063985] [2021-11-12 23:36:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:51,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:51,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:51,261 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:51,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:36:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:51,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:36:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:51,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:51,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:51,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:36:51,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:36:52,122 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:36:52,123 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 23:36:52,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:36:52,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:36:52,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:36:52,715 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:36:52,715 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 23:36:55,001 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:36:55,001 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 23:36:55,134 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 23:36:55,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:55,661 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 23:36:55,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:55,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325063985] [2021-11-12 23:36:55,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325063985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:55,662 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:55,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:36:55,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705743082] [2021-11-12 23:36:55,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:55,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:36:55,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:55,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:36:55,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:36:55,663 INFO L87 Difference]: Start difference. First operand 1200 states and 1828 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 23:36:57,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:02,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:07,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:09,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:10,554 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:14,479 WARN L515 Checker$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 23:37:16,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:21,396 WARN L515 Checker$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 23:37:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:22,549 INFO L93 Difference]: Finished difference Result 3021 states and 4583 transitions. [2021-11-12 23:37:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:37:22,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 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 119 [2021-11-12 23:37:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:22,563 INFO L225 Difference]: With dead ends: 3021 [2021-11-12 23:37:22,563 INFO L226 Difference]: Without dead ends: 1842 [2021-11-12 23:37:22,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 230 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 23:37:22,566 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 322 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 78 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25998.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26695.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:22,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 547 Invalid, 486 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [78 Valid, 406 Invalid, 2 Unknown, 0 Unchecked, 26695.80ms Time] [2021-11-12 23:37:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-11-12 23:37:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1329. [2021-11-12 23:37:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1328 states have (on average 1.5278614457831325) internal successors, (2029), 1328 states have internal predecessors, (2029), 0 states have call successors, (0), 0 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 23:37:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 2029 transitions. [2021-11-12 23:37:22,650 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 2029 transitions. Word has length 119 [2021-11-12 23:37:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:22,650 INFO L470 AbstractCegarLoop]: Abstraction has 1329 states and 2029 transitions. [2021-11-12 23:37:22,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 23:37:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 2029 transitions. [2021-11-12 23:37:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:37:22,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:22,654 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] [2021-11-12 23:37:22,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:22,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:22,874 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash -796665206, now seen corresponding path program 1 times [2021-11-12 23:37:22,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:22,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964632868] [2021-11-12 23:37:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:22,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:22,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:22,878 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:22,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:37:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:23,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:37:23,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:23,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:37:23,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:37:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:37:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:37:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:37:23,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:37:23,706 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:37:23,706 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 23:37:23,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:37:23,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:37:23,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:37:24,218 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:37:24,218 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 23:37:26,464 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:37:26,464 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 23:37:26,596 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 23:37:26,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:27,105 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 23:37:27,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:27,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964632868] [2021-11-12 23:37:27,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964632868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:27,106 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:37:27,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:37:27,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957030321] [2021-11-12 23:37:27,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:27,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:37:27,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:37:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:37:27,108 INFO L87 Difference]: Start difference. First operand 1329 states and 2029 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 23:37:29,145 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:31,156 WARN L515 Checker$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 23:37:43,149 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:49,583 WARN L515 Checker$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 23:37:50,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:52,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:55,941 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 23:37:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:58,816 INFO L93 Difference]: Finished difference Result 3133 states and 4751 transitions. [2021-11-12 23:37:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:37:58,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 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 23:37:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:58,827 INFO L225 Difference]: With dead ends: 3133 [2021-11-12 23:37:58,827 INFO L226 Difference]: Without dead ends: 1825 [2021-11-12 23:37:58,830 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 23:37:58,830 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 312 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30701.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.97ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31520.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:58,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 693 Invalid, 606 Unknown, 0 Unchecked, 3.97ms Time], IncrementalHoareTripleChecker [80 Valid, 524 Invalid, 2 Unknown, 0 Unchecked, 31520.72ms Time] [2021-11-12 23:37:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-11-12 23:37:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1332. [2021-11-12 23:37:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 1.5221637866265965) internal successors, (2026), 1331 states have internal predecessors, (2026), 0 states have call successors, (0), 0 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 23:37:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 2026 transitions. [2021-11-12 23:37:58,922 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 2026 transitions. Word has length 120 [2021-11-12 23:37:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:58,923 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 2026 transitions. [2021-11-12 23:37:58,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 23:37:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 2026 transitions. [2021-11-12 23:37:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:37:58,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:58,927 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] [2021-11-12 23:37:58,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:59,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:59,153 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1259356732, now seen corresponding path program 1 times [2021-11-12 23:37:59,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:59,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899256220] [2021-11-12 23:37:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:59,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:59,156 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:59,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:37:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:59,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:37:59,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:59,832 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 23:37:59,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:00,181 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 23:38:00,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:00,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899256220] [2021-11-12 23:38:00,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899256220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:00,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:00,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:00,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470371530] [2021-11-12 23:38:00,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:00,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:00,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:00,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:00,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:00,183 INFO L87 Difference]: Start difference. First operand 1332 states and 2026 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:01,076 INFO L93 Difference]: Finished difference Result 2670 states and 4065 transitions. [2021-11-12 23:38:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:01,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-12 23:38:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:01,086 INFO L225 Difference]: With dead ends: 2670 [2021-11-12 23:38:01,086 INFO L226 Difference]: Without dead ends: 1359 [2021-11-12 23:38:01,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 251 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 23:38:01,088 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 15 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 822.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 846.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:01,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 424 Invalid, 39 Unknown, 0 Unchecked, 0.51ms Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 846.04ms Time] [2021-11-12 23:38:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-11-12 23:38:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1359. [2021-11-12 23:38:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 1.5176730486008836) internal successors, (2061), 1358 states have internal predecessors, (2061), 0 states have call successors, (0), 0 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 23:38:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2061 transitions. [2021-11-12 23:38:01,161 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2061 transitions. Word has length 127 [2021-11-12 23:38:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 2061 transitions. [2021-11-12 23:38:01,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2061 transitions. [2021-11-12 23:38:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:38:01,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:01,166 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] [2021-11-12 23:38:01,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:01,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:01,382 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:01,382 INFO L85 PathProgramCache]: Analyzing trace with hash 636075130, now seen corresponding path program 1 times [2021-11-12 23:38:01,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:01,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007461494] [2021-11-12 23:38:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:01,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:01,385 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:01,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:38:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:01,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:38:01,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:02,034 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 23:38:02,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:02,427 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 23:38:02,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:02,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007461494] [2021-11-12 23:38:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007461494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:02,428 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:02,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:38:02,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574828889] [2021-11-12 23:38:02,429 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:02,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:38:02,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:38:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:38:02,431 INFO L87 Difference]: Start difference. First operand 1359 states and 2061 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:02,586 INFO L93 Difference]: Finished difference Result 2699 states and 4101 transitions. [2021-11-12 23:38:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:38:02,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-12 23:38:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:02,596 INFO L225 Difference]: With dead ends: 2699 [2021-11-12 23:38:02,596 INFO L226 Difference]: Without dead ends: 1361 [2021-11-12 23:38:02,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 251 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 23:38:02,605 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:02,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 403 Invalid, 37 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 90.35ms Time] [2021-11-12 23:38:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-11-12 23:38:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1361. [2021-11-12 23:38:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 1.5169117647058823) internal successors, (2063), 1360 states have internal predecessors, (2063), 0 states have call successors, (0), 0 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 23:38:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 2063 transitions. [2021-11-12 23:38:02,692 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 2063 transitions. Word has length 127 [2021-11-12 23:38:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:02,693 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 2063 transitions. [2021-11-12 23:38:02,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:38:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 2063 transitions. [2021-11-12 23:38:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 23:38:02,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:02,700 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] [2021-11-12 23:38:02,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-12 23:38:02,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:02,922 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1640288805, now seen corresponding path program 1 times [2021-11-12 23:38:02,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:02,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940154812] [2021-11-12 23:38:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:02,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:02,924 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:02,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:38:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:03,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:03,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:03,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:03,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:03,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:03,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:03,694 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:38:03,694 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 23:38:03,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:03,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:03,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:04,209 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:38:04,210 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 23:38:06,758 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:38:06,758 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 23:38:06,904 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 23:38:06,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:08,187 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 23:38:08,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:08,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940154812] [2021-11-12 23:38:08,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940154812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:08,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:08,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 23:38:08,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298319504] [2021-11-12 23:38:08,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:08,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:08,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:08,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:38:08,189 INFO L87 Difference]: Start difference. First operand 1361 states and 2063 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 23:38:10,219 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 23:38:12,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:26,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:27,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:31,330 WARN L515 Checker$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 23:38:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:32,325 INFO L93 Difference]: Finished difference Result 2925 states and 4428 transitions. [2021-11-12 23:38:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:38:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 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 129 [2021-11-12 23:38:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:32,335 INFO L225 Difference]: With dead ends: 2925 [2021-11-12 23:38:32,335 INFO L226 Difference]: Without dead ends: 1587 [2021-11-12 23:38:32,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 250 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 23:38:32,337 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 57 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23406.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24003.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:32,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 664 Invalid, 334 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [6 Valid, 326 Invalid, 2 Unknown, 0 Unchecked, 24003.69ms Time] [2021-11-12 23:38:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-11-12 23:38:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1488. [2021-11-12 23:38:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 1.5131136516476127) internal successors, (2250), 1487 states have internal predecessors, (2250), 0 states have call successors, (0), 0 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 23:38:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2250 transitions. [2021-11-12 23:38:32,405 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2250 transitions. Word has length 129 [2021-11-12 23:38:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:32,406 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 2250 transitions. [2021-11-12 23:38:32,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 23:38:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2250 transitions. [2021-11-12 23:38:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 23:38:32,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:32,410 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] [2021-11-12 23:38:32,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:32,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:32,628 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash -318285981, now seen corresponding path program 1 times [2021-11-12 23:38:32,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:32,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781267184] [2021-11-12 23:38:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:32,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:32,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:32,632 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:32,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:38:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:33,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:33,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:33,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:33,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:33,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:33,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:33,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:33,388 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 23:38:33,389 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 23:38:33,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:33,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:33,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:33,783 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:38:33,783 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 23:38:35,140 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:38:35,141 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 23:38:35,329 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 23:38:35,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:36,141 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 23:38:36,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:36,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781267184] [2021-11-12 23:38:36,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781267184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:36,142 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:36,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 23:38:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901332805] [2021-11-12 23:38:36,143 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:36,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:38:36,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:38:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:38:36,144 INFO L87 Difference]: Start difference. First operand 1488 states and 2250 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 23:38:38,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:40,186 WARN L515 Checker$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 23:38:41,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:48,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:51,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:55,305 WARN L515 Checker$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 23:38:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:55,985 INFO L93 Difference]: Finished difference Result 3064 states and 4630 transitions. [2021-11-12 23:38:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:38:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 129 [2021-11-12 23:38:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:55,997 INFO L225 Difference]: With dead ends: 3064 [2021-11-12 23:38:55,998 INFO L226 Difference]: Without dead ends: 1599 [2021-11-12 23:38:56,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 250 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 23:38:56,001 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 27 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19241.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19721.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:56,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 746 Invalid, 268 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 2 Unknown, 0 Unchecked, 19721.89ms Time] [2021-11-12 23:38:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-12 23:38:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1560. [2021-11-12 23:38:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 1.5086593970493907) internal successors, (2352), 1559 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 23:38:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2352 transitions. [2021-11-12 23:38:56,089 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2352 transitions. Word has length 129 [2021-11-12 23:38:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 2352 transitions. [2021-11-12 23:38:56,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 23:38:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2352 transitions. [2021-11-12 23:38:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:38:56,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:56,094 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, 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] [2021-11-12 23:38:56,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:56,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:56,314 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1162304597, now seen corresponding path program 1 times [2021-11-12 23:38:56,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:56,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098355879] [2021-11-12 23:38:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:56,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:56,316 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:56,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:38:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:56,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:38:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:56,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:56,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:56,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:56,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:56,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:38:56,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:57,025 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:38:57,025 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 23:38:57,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:57,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:57,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:38:57,414 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:38:57,415 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 23:38:59,068 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:38:59,068 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 23:38:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:38:59,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:38:59,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:59,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098355879] [2021-11-12 23:38:59,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098355879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:59,757 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:59,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:38:59,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074435982] [2021-11-12 23:38:59,757 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:59,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:38:59,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:38:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:38:59,758 INFO L87 Difference]: Start difference. First operand 1560 states and 2352 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 23:39:01,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:03,797 WARN L515 Checker$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 23:39:05,808 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:19,313 WARN L515 Checker$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 23:39:24,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:26,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:37,104 INFO L93 Difference]: Finished difference Result 3606 states and 5417 transitions. [2021-11-12 23:39:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:39:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 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 136 [2021-11-12 23:39:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:37,119 INFO L225 Difference]: With dead ends: 3606 [2021-11-12 23:39:37,119 INFO L226 Difference]: Without dead ends: 2069 [2021-11-12 23:39:37,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 264 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 23:39:37,122 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 232 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 65 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36223.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37151.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:37,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 957 Invalid, 706 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [65 Valid, 636 Invalid, 5 Unknown, 0 Unchecked, 37151.79ms Time] [2021-11-12 23:39:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-11-12 23:39:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1686. [2021-11-12 23:39:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 1.5032640949554896) internal successors, (2533), 1685 states have internal predecessors, (2533), 0 states have call successors, (0), 0 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 23:39:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2533 transitions. [2021-11-12 23:39:37,219 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2533 transitions. Word has length 136 [2021-11-12 23:39:37,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:37,219 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 2533 transitions. [2021-11-12 23:39:37,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 23:39:37,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2533 transitions. [2021-11-12 23:39:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:39:37,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:37,223 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, 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] [2021-11-12 23:39:37,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:37,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:37,438 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:37,439 INFO L85 PathProgramCache]: Analyzing trace with hash -830356879, now seen corresponding path program 1 times [2021-11-12 23:39:37,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:37,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163028438] [2021-11-12 23:39:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:37,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:37,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:37,441 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:37,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:39:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:38,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:38,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:38,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:38,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:38,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:39:38,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:39:38,164 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:39:38,164 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 23:39:38,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:39:38,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:39:38,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:39:38,543 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:39:38,543 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 23:39:40,112 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:39:40,112 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 23:39:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:40,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:40,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:40,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163028438] [2021-11-12 23:39:40,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163028438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:40,839 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:40,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:39:40,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904178450] [2021-11-12 23:39:40,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:40,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:39:40,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:40,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:39:40,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:39:40,840 INFO L87 Difference]: Start difference. First operand 1686 states and 2533 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:39:42,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:44,877 WARN L515 Checker$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 23:39:50,145 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:52,890 WARN L515 Checker$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 23:39:54,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:56,739 WARN L515 Checker$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 23:40:00,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:04,489 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:05,899 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 23:40:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:07,463 INFO L93 Difference]: Finished difference Result 3669 states and 5485 transitions. [2021-11-12 23:40:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:40:07,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-12 23:40:07,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:07,471 INFO L225 Difference]: With dead ends: 3669 [2021-11-12 23:40:07,471 INFO L226 Difference]: Without dead ends: 2006 [2021-11-12 23:40:07,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 266 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 23:40:07,473 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 281 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25824.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.21ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26448.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:07,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 550 Invalid, 483 Unknown, 0 Unchecked, 3.21ms Time], IncrementalHoareTripleChecker [75 Valid, 406 Invalid, 2 Unknown, 0 Unchecked, 26448.41ms Time] [2021-11-12 23:40:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-11-12 23:40:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1686. [2021-11-12 23:40:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 1.489614243323442) internal successors, (2510), 1685 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 23:40:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2510 transitions. [2021-11-12 23:40:07,542 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2510 transitions. Word has length 137 [2021-11-12 23:40:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:07,542 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 2510 transitions. [2021-11-12 23:40:07,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2510 transitions. [2021-11-12 23:40:07,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:40:07,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:07,545 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] [2021-11-12 23:40:07,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:07,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:07,745 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:07,746 INFO L85 PathProgramCache]: Analyzing trace with hash -859071212, now seen corresponding path program 1 times [2021-11-12 23:40:07,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:07,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920782788] [2021-11-12 23:40:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:07,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:07,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:07,749 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:07,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:40:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:08,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:08,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:08,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:08,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:08,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:08,473 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:40:08,473 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 23:40:08,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:08,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:08,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:08,867 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:40:08,867 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 23:40:10,118 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:40:10,118 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 23:40:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:40:10,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:40:10,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:10,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920782788] [2021-11-12 23:40:10,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920782788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:10,877 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:10,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:40:10,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641669702] [2021-11-12 23:40:10,877 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:10,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:40:10,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:10,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:40:10,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:40:10,878 INFO L87 Difference]: Start difference. First operand 1686 states and 2510 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:12,909 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 23:40:14,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:16,931 WARN L515 Checker$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 23:40:27,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:32,375 WARN L515 Checker$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 23:40:35,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:37,561 WARN L515 Checker$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 23:40:39,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:41,898 WARN L515 Checker$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 23:40:44,495 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 23:40:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:51,324 INFO L93 Difference]: Finished difference Result 3669 states and 5439 transitions. [2021-11-12 23:40:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:40:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-12 23:40:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:51,337 INFO L225 Difference]: With dead ends: 3669 [2021-11-12 23:40:51,337 INFO L226 Difference]: Without dead ends: 2006 [2021-11-12 23:40:51,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 294 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 23:40:51,339 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 226 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 67 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39318.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.98ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40265.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:51,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 858 Invalid, 705 Unknown, 0 Unchecked, 3.98ms Time], IncrementalHoareTripleChecker [67 Valid, 635 Invalid, 3 Unknown, 0 Unchecked, 40265.21ms Time] [2021-11-12 23:40:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-11-12 23:40:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1686. [2021-11-12 23:40:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 1.4724035608308605) internal successors, (2481), 1685 states have internal predecessors, (2481), 0 states have call successors, (0), 0 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 23:40:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2481 transitions. [2021-11-12 23:40:51,415 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2481 transitions. Word has length 151 [2021-11-12 23:40:51,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:51,416 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 2481 transitions. [2021-11-12 23:40:51,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:40:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2481 transitions. [2021-11-12 23:40:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:40:51,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:51,418 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] [2021-11-12 23:40:51,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:51,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:51,630 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1462730706, now seen corresponding path program 1 times [2021-11-12 23:40:51,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:51,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286717783] [2021-11-12 23:40:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:51,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:51,633 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:51,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:40:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:52,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:40:52,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:52,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:40:52,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:52,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:52,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:52,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:52,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:40:52,762 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:40:52,762 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 23:40:54,118 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:40:54,118 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 23:40:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:40:54,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:40:54,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:54,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286717783] [2021-11-12 23:40:54,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286717783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:54,797 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:54,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:40:54,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005373198] [2021-11-12 23:40:54,797 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:54,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:54,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:54,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:54,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:40:54,798 INFO L87 Difference]: Start difference. First operand 1686 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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) [2021-11-12 23:40:56,839 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 23:40:58,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:00,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:07,711 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:09,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:13,599 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 23:41:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:14,717 INFO L93 Difference]: Finished difference Result 3469 states and 5107 transitions. [2021-11-12 23:41:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:41:14,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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 151 [2021-11-12 23:41:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:14,729 INFO L225 Difference]: With dead ends: 3469 [2021-11-12 23:41:14,729 INFO L226 Difference]: Without dead ends: 1806 [2021-11-12 23:41:14,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 296 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 23:41:14,732 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 29 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19299.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19789.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:14,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 746 Invalid, 276 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 2 Unknown, 0 Unchecked, 19789.75ms Time] [2021-11-12 23:41:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-11-12 23:41:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1764. [2021-11-12 23:41:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 1.4702212138400454) internal successors, (2592), 1763 states have internal predecessors, (2592), 0 states have call successors, (0), 0 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 23:41:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2592 transitions. [2021-11-12 23:41:14,794 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2592 transitions. Word has length 151 [2021-11-12 23:41:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:14,795 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 2592 transitions. [2021-11-12 23:41:14,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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) [2021-11-12 23:41:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2592 transitions. [2021-11-12 23:41:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:41:14,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:14,796 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] [2021-11-12 23:41:14,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:15,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:15,010 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash 756699299, now seen corresponding path program 1 times [2021-11-12 23:41:15,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:15,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128993452] [2021-11-12 23:41:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:15,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:15,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:15,012 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:15,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:41:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:41:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:15,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:15,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:15,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:15,703 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:41:15,703 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 23:41:15,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:15,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:15,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:16,074 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:41:16,074 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 23:41:18,011 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:41:18,011 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 23:41:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:41:18,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:41:18,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:18,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128993452] [2021-11-12 23:41:18,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128993452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:18,816 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:18,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:41:18,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811276726] [2021-11-12 23:41:18,816 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:18,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:41:18,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:41:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:18,817 INFO L87 Difference]: Start difference. First operand 1764 states and 2592 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 23:41:20,850 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 23:41:22,867 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:33,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:38,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:40,873 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:42,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:46,213 WARN L515 Checker$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 23:41:48,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:50,622 WARN L515 Checker$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 23:41:52,360 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 23:41:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:54,783 INFO L93 Difference]: Finished difference Result 3957 states and 5789 transitions. [2021-11-12 23:41:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:41:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 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 [2021-11-12 23:41:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:54,793 INFO L225 Difference]: With dead ends: 3957 [2021-11-12 23:41:54,794 INFO L226 Difference]: Without dead ends: 2216 [2021-11-12 23:41:54,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 296 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 23:41:54,797 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 214 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 67 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34857.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.88ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35762.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:54,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 835 Invalid, 696 Unknown, 0 Unchecked, 3.88ms Time], IncrementalHoareTripleChecker [67 Valid, 625 Invalid, 4 Unknown, 0 Unchecked, 35762.57ms Time] [2021-11-12 23:41:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-11-12 23:41:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1881. [2021-11-12 23:41:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 1.4601063829787233) internal successors, (2745), 1880 states have internal predecessors, (2745), 0 states have call successors, (0), 0 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 23:41:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2745 transitions. [2021-11-12 23:41:54,870 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2745 transitions. Word has length 152 [2021-11-12 23:41:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:54,870 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 2745 transitions. [2021-11-12 23:41:54,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 23:41:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2745 transitions. [2021-11-12 23:41:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-12 23:41:54,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:54,872 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, 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] [2021-11-12 23:41:54,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:55,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:55,073 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -904200860, now seen corresponding path program 1 times [2021-11-12 23:41:55,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:55,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294450348] [2021-11-12 23:41:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:55,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:55,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:55,075 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:55,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:41:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:55,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:41:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:55,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:55,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:55,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:41:55,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:55,796 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:41:55,796 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 23:41:55,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:55,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:55,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:41:56,176 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:41:56,177 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 23:41:58,244 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:41:58,244 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 23:41:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:41:58,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 23:41:59,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:59,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294450348] [2021-11-12 23:41:59,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294450348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:59,015 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:59,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:41:59,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235952496] [2021-11-12 23:41:59,016 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:59,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:41:59,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:41:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:59,017 INFO L87 Difference]: Start difference. First operand 1881 states and 2745 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 23:42:01,048 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 23:42:03,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:14,300 WARN L515 Checker$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 23:42:15,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:18,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:20,297 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 23:42:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:25,026 INFO L93 Difference]: Finished difference Result 4041 states and 5883 transitions. [2021-11-12 23:42:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:42:25,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 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 [2021-11-12 23:42:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:25,033 INFO L225 Difference]: With dead ends: 4041 [2021-11-12 23:42:25,034 INFO L226 Difference]: Without dead ends: 2183 [2021-11-12 23:42:25,036 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 [2021-11-12 23:42:25,037 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 252 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 70 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25200.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25825.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:25,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 554 Invalid, 479 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [70 Valid, 406 Invalid, 3 Unknown, 0 Unchecked, 25825.88ms Time] [2021-11-12 23:42:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-11-12 23:42:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1881. [2021-11-12 23:42:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 1.453723404255319) internal successors, (2733), 1880 states have internal predecessors, (2733), 0 states have call successors, (0), 0 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 23:42:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2733 transitions. [2021-11-12 23:42:25,145 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2733 transitions. Word has length 153 [2021-11-12 23:42:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:25,145 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 2733 transitions. [2021-11-12 23:42:25,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 23:42:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2733 transitions. [2021-11-12 23:42:25,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 23:42:25,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:25,147 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, 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, 1, 1] [2021-11-12 23:42:25,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:25,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:25,354 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1616787329, now seen corresponding path program 1 times [2021-11-12 23:42:25,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:25,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383292127] [2021-11-12 23:42:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:25,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:25,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:25,357 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:25,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8159e117-5f23-4451-9c24-5dbb0c5ff5da/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:42:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:26,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:42:26,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:26,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:42:26,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:26,296 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:42:26,296 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 23:42:26,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:42:26,692 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:42:26,692 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 23:42:28,100 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:42:28,100 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 23:42:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:42:28,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:42:28,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:28,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383292127] [2021-11-12 23:42:28,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383292127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:28,873 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:28,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:42:28,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152897018] [2021-11-12 23:42:28,874 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:28,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:42:28,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:42:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:28,875 INFO L87 Difference]: Start difference. First operand 1881 states and 2733 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) [2021-11-12 23:42:30,903 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 23:42:38,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:41,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:44,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:45,121 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:46,471 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:50,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []