./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/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 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:13:42,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:13:42,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:13:42,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:13:42,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:13:42,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:13:42,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:13:42,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:13:42,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:13:42,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:13:42,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:13:42,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:13:42,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:13:42,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:13:42,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:13:42,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:13:42,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:13:42,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:13:42,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:13:42,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:13:42,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:13:42,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:13:42,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:13:42,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:13:42,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:13:42,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:13:42,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:13:42,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:13:42,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:13:42,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:13:42,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:13:42,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:13:42,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:13:42,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:13:42,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:13:42,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:13:42,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:13:42,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:13:42,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:13:42,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:13:42,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:13:42,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:13:42,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:13:42,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:13:42,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:13:42,965 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:13:42,965 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:13:42,965 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:13:42,966 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:13:42,966 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:13:42,969 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:13:42,969 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:13:42,971 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:13:42,971 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:13:42,971 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:13:42,972 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:13:42,972 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:13:42,972 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:13:42,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:13:42,973 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:13:42,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:13:42,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:13:42,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:13:42,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:13:42,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:13:42,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:13:42,975 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:13:42,975 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:13:42,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:13:42,975 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:13:42,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:13:42,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:13:42,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:13:42,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:13:42,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:13:42,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:13:42,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:13:42,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:13:42,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:13:42,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:13:42,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:13:42,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:13:42,980 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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2021-11-12 23:13:43,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:13:43,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:13:43,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:13:43,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:13:43,320 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:13:43,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-12 23:13:43,421 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data/79c9c5b57/46345f7e71e2429ebfcbcbc0954cc921/FLAGa6d71a87c [2021-11-12 23:13:43,983 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:13:43,984 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-12 23:13:44,006 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data/79c9c5b57/46345f7e71e2429ebfcbcbc0954cc921/FLAGa6d71a87c [2021-11-12 23:13:44,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data/79c9c5b57/46345f7e71e2429ebfcbcbc0954cc921 [2021-11-12 23:13:44,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:13:44,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:13:44,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:13:44,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:13:44,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:13:44,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed8eb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44, skipping insertion in model container [2021-11-12 23:13:44,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:13:44" (1/1) ... [2021-11-12 23:13:44,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:13:44,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:13:44,751 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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-12 23:13:44,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:13:44,776 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 23:13:44,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@175151f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:44, skipping insertion in model container [2021-11-12 23:13:44,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:13:44,778 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:13:44,780 INFO L158 Benchmark]: Toolchain (without parser) took 535.93ms. Allocated memory was 90.2MB in the beginning and 136.3MB in the end (delta: 46.1MB). Free memory was 54.0MB in the beginning and 103.3MB in the end (delta: -49.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:13:44,780 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory was 61.4MB in the beginning and 61.3MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:13:44,782 INFO L158 Benchmark]: CACSL2BoogieTranslator took 530.20ms. Allocated memory was 90.2MB in the beginning and 136.3MB in the end (delta: 46.1MB). Free memory was 53.9MB in the beginning and 104.0MB in the end (delta: -50.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:13:44,783 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory was 61.4MB in the beginning and 61.3MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 530.20ms. Allocated memory was 90.2MB in the beginning and 136.3MB in the end (delta: 46.1MB). Free memory was 53.9MB in the beginning and 104.0MB in the end (delta: -50.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/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 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:13:47,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:13:47,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:13:47,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:13:47,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:13:47,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:13:47,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:13:47,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:13:47,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:13:47,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:13:47,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:13:47,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:13:47,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:13:47,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:13:47,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:13:47,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:13:47,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:13:47,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:13:47,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:13:47,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:13:47,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:13:47,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:13:47,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:13:47,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:13:47,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:13:47,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:13:47,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:13:47,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:13:47,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:13:47,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:13:47,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:13:47,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:13:47,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:13:47,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:13:47,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:13:47,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:13:47,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:13:47,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:13:47,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:13:47,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:13:47,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:13:47,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:13:47,236 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:13:47,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:13:47,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:13:47,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:13:47,238 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:13:47,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:13:47,239 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:13:47,239 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:13:47,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:13:47,239 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:13:47,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:13:47,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:13:47,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:13:47,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:13:47,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:13:47,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:13:47,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:13:47,243 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:13:47,243 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:13:47,244 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:13:47,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:13:47,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:13:47,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:13:47,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:13:47,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:13:47,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:13:47,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:13:47,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:13:47,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:13:47,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:13:47,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:13:47,246 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:13:47,247 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:13:47,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:13:47,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:13:47,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:13:47,248 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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2021-11-12 23:13:47,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:13:47,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:13:47,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:13:47,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:13:47,660 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:13:47,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-12 23:13:47,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data/aa2a29fd3/d805d8af14614250970d4bece017c9cd/FLAGa93dacdd7 [2021-11-12 23:13:48,444 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:13:48,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-12 23:13:48,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data/aa2a29fd3/d805d8af14614250970d4bece017c9cd/FLAGa93dacdd7 [2021-11-12 23:13:48,583 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/data/aa2a29fd3/d805d8af14614250970d4bece017c9cd [2021-11-12 23:13:48,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:13:48,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:13:48,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:13:48,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:13:48,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:13:48,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:13:48" (1/1) ... [2021-11-12 23:13:48,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22910891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:48, skipping insertion in model container [2021-11-12 23:13:48,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:13:48" (1/1) ... [2021-11-12 23:13:48,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:13:48,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:13:49,185 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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-12 23:13:49,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:13:49,232 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:13:49,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:13:49,382 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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-12 23:13:49,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:13:49,400 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:13:49,537 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_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-12 23:13:49,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:13:49,561 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:13:49,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49 WrapperNode [2021-11-12 23:13:49,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:13:49,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:13:49,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:13:49,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:13:49,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:13:49,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:13:49,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:13:49,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:13:49,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:13:49,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:13:49,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:13:49,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:13:49,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (1/1) ... [2021-11-12 23:13:49,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:13:49,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:13:49,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:13:49,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:13:49,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:13:49,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:13:49,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:13:49,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:13:49,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:13:49,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:13:49,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:13:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:13:49,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:13:50,177 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:13:58,908 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 23:13:58,908 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 23:13:58,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:13:58,917 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:13:58,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:13:58 BoogieIcfgContainer [2021-11-12 23:13:58,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:13:58,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:13:58,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:13:58,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:13:58,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:13:48" (1/3) ... [2021-11-12 23:13:58,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f98e342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:13:58, skipping insertion in model container [2021-11-12 23:13:58,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:13:49" (2/3) ... [2021-11-12 23:13:58,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f98e342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:13:58, skipping insertion in model container [2021-11-12 23:13:58,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:13:58" (3/3) ... [2021-11-12 23:13:58,928 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.09.i.cil-1.c [2021-11-12 23:13:58,933 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:13:58,933 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:13:58,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:13:59,003 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 23:13:59,004 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:13:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 23:13:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 23:13:59,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:59,031 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] [2021-11-12 23:13:59,032 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:59,038 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-12 23:13:59,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:13:59,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099172560] [2021-11-12 23:13:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:59,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:13:59,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:13:59,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:13:59,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:13:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:59,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:13:59,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:13:59,759 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 23:13:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:13:59,964 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 23:13:59,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:13:59,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099172560] [2021-11-12 23:13:59,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099172560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:59,968 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:59,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:13:59,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606521363] [2021-11-12 23:13:59,979 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:59,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:13:59,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:00,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:14:00,029 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:00,289 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-12 23:14:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:00,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-12 23:14:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:00,317 INFO L225 Difference]: With dead ends: 566 [2021-11-12 23:14:00,318 INFO L226 Difference]: Without dead ends: 387 [2021-11-12 23:14:00,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 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 23:14:00,328 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.05ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:00,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 20.05ms Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 133.66ms Time] [2021-11-12 23:14:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-12 23:14:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-12 23:14:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 23:14:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-12 23:14:00,396 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-12 23:14:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:00,397 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-12 23:14:00,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-12 23:14:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:14:00,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:00,402 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] [2021-11-12 23:14:00,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:00,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:00,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-12 23:14:00,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:00,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132035314] [2021-11-12 23:14:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:00,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:00,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:00,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:00,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:14:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:00,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:01,114 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 23:14:01,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:01,352 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 23:14:01,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:01,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132035314] [2021-11-12 23:14:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132035314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:01,354 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:01,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:14:01,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148764119] [2021-11-12 23:14:01,354 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:01,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:01,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:01,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:14:01,357 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 23:14:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:02,271 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-12 23:14:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 23:14:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:02,277 INFO L225 Difference]: With dead ends: 882 [2021-11-12 23:14:02,277 INFO L226 Difference]: Without dead ends: 631 [2021-11-12 23:14:02,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 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 23:14:02,281 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 305 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 852.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 879.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:02,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 722 Invalid, 79 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 879.46ms Time] [2021-11-12 23:14:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-12 23:14:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-12 23:14:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 23:14:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-12 23:14:02,337 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-12 23:14:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:02,339 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-12 23:14:02,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 23:14:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-12 23:14:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 23:14:02,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:02,355 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:02,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:02,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:02,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1546935351, now seen corresponding path program 1 times [2021-11-12 23:14:02,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:02,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341077224] [2021-11-12 23:14:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:02,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:02,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:02,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:02,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:14:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:02,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:02,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:14:03,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:14:03,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:03,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341077224] [2021-11-12 23:14:03,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341077224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:03,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:03,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:14:03,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303241626] [2021-11-12 23:14:03,692 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:03,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:03,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:14:03,694 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:04,439 INFO L93 Difference]: Finished difference Result 1368 states and 2093 transitions. [2021-11-12 23:14:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:04,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-12 23:14:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:04,446 INFO L225 Difference]: With dead ends: 1368 [2021-11-12 23:14:04,446 INFO L226 Difference]: Without dead ends: 873 [2021-11-12 23:14:04,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 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 23:14:04,448 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 289 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 673.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 703.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:04,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 727 Invalid, 79 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 703.59ms Time] [2021-11-12 23:14:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-12 23:14:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2021-11-12 23:14:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.518348623853211) internal successors, (1324), 872 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states 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 23:14:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1324 transitions. [2021-11-12 23:14:04,485 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1324 transitions. Word has length 121 [2021-11-12 23:14:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:04,486 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1324 transitions. [2021-11-12 23:14:04,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1324 transitions. [2021-11-12 23:14:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:14:04,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:04,492 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] [2021-11-12 23:14:04,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:04,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:04,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:04,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1117044971, now seen corresponding path program 1 times [2021-11-12 23:14:04,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:04,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643142906] [2021-11-12 23:14:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:04,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:04,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:04,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:04,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:14:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:14:05,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:14:05,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:14:05,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:05,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643142906] [2021-11-12 23:14:05,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643142906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:05,894 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:05,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:14:05,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193393577] [2021-11-12 23:14:05,895 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:05,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:14:05,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:05,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:14:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:14:05,897 INFO L87 Difference]: Start difference. First operand 873 states and 1324 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 23:14:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:07,043 INFO L93 Difference]: Finished difference Result 1860 states and 2832 transitions. [2021-11-12 23:14:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:14:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 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 150 [2021-11-12 23:14:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:07,051 INFO L225 Difference]: With dead ends: 1860 [2021-11-12 23:14:07,052 INFO L226 Difference]: Without dead ends: 1121 [2021-11-12 23:14:07,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 296 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 23:14:07,054 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 296 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1059.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1086.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:07,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 729 Invalid, 75 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [19 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1086.54ms Time] [2021-11-12 23:14:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-12 23:14:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2021-11-12 23:14:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5133928571428572) internal successors, (1695), 1120 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states 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 23:14:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1695 transitions. [2021-11-12 23:14:07,101 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1695 transitions. Word has length 150 [2021-11-12 23:14:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:07,102 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1695 transitions. [2021-11-12 23:14:07,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 23:14:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1695 transitions. [2021-11-12 23:14:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:14:07,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:07,106 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:07,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:07,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:07,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2092203957, now seen corresponding path program 1 times [2021-11-12 23:14:07,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:07,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966161983] [2021-11-12 23:14:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:07,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:07,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:07,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:07,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:14:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:08,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:14:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:08,212 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 23:14:08,223 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 23:14:08,293 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:08,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:14:08,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:08,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-12 23:14:08,324 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 23:14:08,802 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 23:14:08,803 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 23:14:08,947 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:08,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-12 23:14:08,959 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 221 treesize of output 210 [2021-11-12 23:14:08,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:08,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,070 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 129 treesize of output 101 [2021-11-12 23:14:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,098 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 23:14:09,218 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 23:14:09,218 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 23:14:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:09,250 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 23:14:09,281 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 23:14:09,285 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 23:14:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-12 23:14:09,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:10,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:10,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 23:14:10,278 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:10,285 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 23:14:10,426 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:10,428 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-12 23:14:10,435 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:10,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-12 23:14:10,450 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:10,454 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-12 23:14:10,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:10,474 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-12 23:14:10,491 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:10,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-12 23:14:10,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:14:10,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-12 23:14:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-12 23:14:11,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:11,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966161983] [2021-11-12 23:14:11,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966161983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:11,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:11,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:14:11,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725094943] [2021-11-12 23:14:11,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:11,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:14:11,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:11,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:14:11,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:14:11,016 INFO L87 Difference]: Start difference. First operand 1121 states and 1695 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:13,045 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 23:14:14,138 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:14:19,190 INFO L93 Difference]: Finished difference Result 2239 states and 3386 transitions. [2021-11-12 23:14:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:14:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-12 23:14:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:14:19,199 INFO L225 Difference]: With dead ends: 2239 [2021-11-12 23:14:19,199 INFO L226 Difference]: Without dead ends: 1121 [2021-11-12 23:14:19,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:14:19,202 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 10 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7854.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 8073.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:14:19,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 876 Invalid, 173 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 1 Unknown, 58 Unchecked, 8073.22ms Time] [2021-11-12 23:14:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-12 23:14:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2021-11-12 23:14:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5125) internal successors, (1694), 1120 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states 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 23:14:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1694 transitions. [2021-11-12 23:14:19,248 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1694 transitions. Word has length 174 [2021-11-12 23:14:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:14:19,248 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1694 transitions. [2021-11-12 23:14:19,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:14:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1694 transitions. [2021-11-12 23:14:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:14:19,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:14:19,252 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:14:19,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:14:19,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:14:19,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:14:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:14:19,466 INFO L85 PathProgramCache]: Analyzing trace with hash 834302729, now seen corresponding path program 1 times [2021-11-12 23:14:19,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:14:19,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713458260] [2021-11-12 23:14:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:14:19,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:14:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:14:19,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:14:19,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:14:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:14:20,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:14:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:14:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:20,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:20,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:20,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:14:20,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:14:20,563 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 23:14:20,563 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 23:14:20,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:14:20,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:14:20,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:14:21,038 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:14:21,039 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 23:14:22,484 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:14:22,484 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 23:14:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 23:14:22,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:14:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-12 23:14:23,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:14:23,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713458260] [2021-11-12 23:14:23,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713458260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:14:23,428 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:14:23,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:14:23,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007550391] [2021-11-12 23:14:23,428 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:14:23,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:14:23,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:14:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:14:23,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:14:23,430 INFO L87 Difference]: Start difference. First operand 1121 states and 1694 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 23:14:25,461 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 23:14:27,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:31,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:41,070 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:45,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:48,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:14:50,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:01,702 INFO L93 Difference]: Finished difference Result 4230 states and 6418 transitions. [2021-11-12 23:15:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:15:01,704 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 174 [2021-11-12 23:15:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:01,722 INFO L225 Difference]: With dead ends: 4230 [2021-11-12 23:15:01,723 INFO L226 Difference]: Without dead ends: 3119 [2021-11-12 23:15:01,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:15:01,726 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 377 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 86 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37017.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.36ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38020.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:01,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 793 Invalid, 821 Unknown, 0 Unchecked, 10.36ms Time], IncrementalHoareTripleChecker [86 Valid, 733 Invalid, 2 Unknown, 0 Unchecked, 38020.13ms Time] [2021-11-12 23:15:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2021-11-12 23:15:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 1345. [2021-11-12 23:15:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 1.5476190476190477) internal successors, (2080), 1344 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states 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 23:15:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2080 transitions. [2021-11-12 23:15:01,828 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2080 transitions. Word has length 174 [2021-11-12 23:15:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:01,829 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 2080 transitions. [2021-11-12 23:15:01,829 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 23:15:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2080 transitions. [2021-11-12 23:15:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:15:01,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:01,834 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:01,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 23:15:02,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:02,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash 289430155, now seen corresponding path program 1 times [2021-11-12 23:15:02,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:02,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287402144] [2021-11-12 23:15:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:02,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:02,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:02,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:15:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:02,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:03,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:03,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:03,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:03,394 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:15:03,394 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 23:15:04,929 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:15:04,930 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 23:15:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:15:05,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:15:05,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:05,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287402144] [2021-11-12 23:15:05,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287402144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:05,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:05,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:15:05,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348735287] [2021-11-12 23:15:05,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:05,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:15:05,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:15:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:15:05,503 INFO L87 Difference]: Start difference. First operand 1345 states and 2080 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 23:15:07,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:09,115 WARN L515 Checker$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 23:15:10,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:12,798 WARN L515 Checker$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 23:15:14,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:23,461 INFO L93 Difference]: Finished difference Result 3252 states and 5030 transitions. [2021-11-12 23:15:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:15:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 174 [2021-11-12 23:15:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:23,479 INFO L225 Difference]: With dead ends: 3252 [2021-11-12 23:15:23,480 INFO L226 Difference]: Without dead ends: 1917 [2021-11-12 23:15:23,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 342 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 23:15:23,483 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17391.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.43ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17796.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:23,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 615 Invalid, 240 Unknown, 0 Unchecked, 4.43ms Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 17796.89ms Time] [2021-11-12 23:15:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-11-12 23:15:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1597. [2021-11-12 23:15:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 1.5795739348370927) internal successors, (2521), 1596 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states 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 23:15:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2521 transitions. [2021-11-12 23:15:23,591 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2521 transitions. Word has length 174 [2021-11-12 23:15:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:23,592 INFO L470 AbstractCegarLoop]: Abstraction has 1597 states and 2521 transitions. [2021-11-12 23:15:23,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 23:15:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2521 transitions. [2021-11-12 23:15:23,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-12 23:15:23,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:23,597 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:23,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:23,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:23,817 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:23,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash -975340285, now seen corresponding path program 1 times [2021-11-12 23:15:23,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:23,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491421982] [2021-11-12 23:15:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:23,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:23,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:23,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:15:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:24,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:24,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:24,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:24,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:24,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:24,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:25,183 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:15:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 23:15:25,826 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:15:25,826 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 23:15:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:15:26,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:15:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:15:26,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:15:26,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491421982] [2021-11-12 23:15:26,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491421982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:15:26,425 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:15:26,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:15:26,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945028793] [2021-11-12 23:15:26,426 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:15:26,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:15:26,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:15:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:15:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:15:26,427 INFO L87 Difference]: Start difference. First operand 1597 states and 2521 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:28,445 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 23:15:32,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:34,265 WARN L515 Checker$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 23:15:45,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:49,156 WARN L515 Checker$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 23:15:50,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:15:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:15:58,270 INFO L93 Difference]: Finished difference Result 4741 states and 7399 transitions. [2021-11-12 23:15:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:15:58,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-12 23:15:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:15:58,293 INFO L225 Difference]: With dead ends: 4741 [2021-11-12 23:15:58,294 INFO L226 Difference]: Without dead ends: 3154 [2021-11-12 23:15:58,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 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 23:15:58,297 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 214 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30891.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.19ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31589.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:15:58,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 553 Invalid, 541 Unknown, 0 Unchecked, 6.19ms Time], IncrementalHoareTripleChecker [69 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 31589.22ms Time] [2021-11-12 23:15:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-11-12 23:15:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1869. [2021-11-12 23:15:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5813704496788008) internal successors, (2954), 1868 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states 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 23:15:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2954 transitions. [2021-11-12 23:15:58,425 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2954 transitions. Word has length 187 [2021-11-12 23:15:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:15:58,426 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2954 transitions. [2021-11-12 23:15:58,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:15:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2954 transitions. [2021-11-12 23:15:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:15:58,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:15:58,432 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:15:58,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:15:58,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:15:58,656 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:15:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:15:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash 988941552, now seen corresponding path program 1 times [2021-11-12 23:15:58,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:15:58,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752233746] [2021-11-12 23:15:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:15:58,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:15:58,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:15:58,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:15:58,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:15:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:15:59,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:15:59,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:15:59,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:15:59,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:59,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:59,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:59,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:15:59,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:00,054 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:16:00,054 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 23:16:00,398 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:16:00,398 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 23:16:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:16:00,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:16:01,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:01,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752233746] [2021-11-12 23:16:01,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752233746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:01,008 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:01,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:16:01,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565667671] [2021-11-12 23:16:01,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:01,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:16:01,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:01,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:16:01,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:16:01,010 INFO L87 Difference]: Start difference. First operand 1869 states and 2954 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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 23:16:03,032 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 23:16:05,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:09,087 WARN L515 Checker$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 23:16:17,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:19,628 WARN L515 Checker$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 23:16:21,165 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:22,464 WARN L515 Checker$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 23:16:26,104 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:34,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:34,308 INFO L93 Difference]: Finished difference Result 4923 states and 7653 transitions. [2021-11-12 23:16:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:16:34,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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 188 [2021-11-12 23:16:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:34,327 INFO L225 Difference]: With dead ends: 4923 [2021-11-12 23:16:34,327 INFO L226 Difference]: Without dead ends: 3064 [2021-11-12 23:16:34,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 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 23:16:34,333 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 223 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32311.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.59ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33017.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:34,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 529 Invalid, 543 Unknown, 0 Unchecked, 5.59ms Time], IncrementalHoareTripleChecker [69 Valid, 472 Invalid, 2 Unknown, 0 Unchecked, 33017.23ms Time] [2021-11-12 23:16:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-11-12 23:16:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1869. [2021-11-12 23:16:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5626338329764453) internal successors, (2919), 1868 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states 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 23:16:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2919 transitions. [2021-11-12 23:16:34,463 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2919 transitions. Word has length 188 [2021-11-12 23:16:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:34,463 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2919 transitions. [2021-11-12 23:16:34,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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 23:16:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2919 transitions. [2021-11-12 23:16:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:16:34,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:34,469 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:34,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:34,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:34,683 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:34,684 INFO L85 PathProgramCache]: Analyzing trace with hash -617202468, now seen corresponding path program 1 times [2021-11-12 23:16:34,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:34,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730777666] [2021-11-12 23:16:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:34,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:34,686 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:34,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:16:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:16:35,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:16:35,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:35,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:35,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:35,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:35,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:16:36,366 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:16:36,366 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 23:16:36,756 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:16:36,756 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 23:16:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:16:36,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:16:37,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:37,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730777666] [2021-11-12 23:16:37,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730777666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:37,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:37,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:16:37,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091194088] [2021-11-12 23:16:37,359 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:37,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:16:37,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:16:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:16:37,360 INFO L87 Difference]: Start difference. First operand 1869 states and 2919 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 23:16:39,384 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 23:16:53,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:16:57,445 WARN L515 Checker$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 23:16:59,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:09,680 WARN L515 Checker$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 23:17:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:09,851 INFO L93 Difference]: Finished difference Result 5115 states and 7903 transitions. [2021-11-12 23:17:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:17:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 188 [2021-11-12 23:17:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:09,870 INFO L225 Difference]: With dead ends: 5115 [2021-11-12 23:17:09,870 INFO L226 Difference]: Without dead ends: 3256 [2021-11-12 23:17:09,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 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 23:17:09,874 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 219 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31434.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.23ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32255.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:09,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 785 Invalid, 685 Unknown, 0 Unchecked, 7.23ms Time], IncrementalHoareTripleChecker [65 Valid, 618 Invalid, 2 Unknown, 0 Unchecked, 32255.64ms Time] [2021-11-12 23:17:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-11-12 23:17:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1965. [2021-11-12 23:17:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.5417515274949083) internal successors, (3028), 1964 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states 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 23:17:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3028 transitions. [2021-11-12 23:17:10,003 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3028 transitions. Word has length 188 [2021-11-12 23:17:10,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:10,003 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 3028 transitions. [2021-11-12 23:17:10,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 23:17:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3028 transitions. [2021-11-12 23:17:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:17:10,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:10,009 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:10,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:10,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:10,230 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1565412453, now seen corresponding path program 1 times [2021-11-12 23:17:10,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:10,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722369194] [2021-11-12 23:17:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:10,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:10,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:10,233 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:10,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:17:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:10,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:10,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:11,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:11,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:11,426 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:17:11,426 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 23:17:12,144 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:17:12,145 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 23:17:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:17:12,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:17:12,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:12,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722369194] [2021-11-12 23:17:12,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722369194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:12,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:12,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:17:12,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372780235] [2021-11-12 23:17:12,725 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:12,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:17:12,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:12,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:17:12,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:12,727 INFO L87 Difference]: Start difference. First operand 1965 states and 3028 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 23:17:14,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:28,570 WARN L515 Checker$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 23:17:29,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:32,539 WARN L515 Checker$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 23:17:34,290 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 23:17:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:41,821 INFO L93 Difference]: Finished difference Result 5097 states and 7783 transitions. [2021-11-12 23:17:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:17:41,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 188 [2021-11-12 23:17:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:41,839 INFO L225 Difference]: With dead ends: 5097 [2021-11-12 23:17:41,839 INFO L226 Difference]: Without dead ends: 3142 [2021-11-12 23:17:41,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 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 23:17:41,842 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 206 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28183.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.59ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28872.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:41,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 524 Invalid, 530 Unknown, 0 Unchecked, 4.59ms Time], IncrementalHoareTripleChecker [68 Valid, 461 Invalid, 1 Unknown, 0 Unchecked, 28872.11ms Time] [2021-11-12 23:17:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-11-12 23:17:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 1981. [2021-11-12 23:17:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.5323232323232323) internal successors, (3034), 1980 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states 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 23:17:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3034 transitions. [2021-11-12 23:17:41,986 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3034 transitions. Word has length 188 [2021-11-12 23:17:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:41,986 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3034 transitions. [2021-11-12 23:17:41,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 23:17:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3034 transitions. [2021-11-12 23:17:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-12 23:17:41,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:41,993 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:42,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:42,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:42,213 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:17:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1437107291, now seen corresponding path program 1 times [2021-11-12 23:17:42,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:42,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642833519] [2021-11-12 23:17:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:42,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:42,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:42,215 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:42,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:17:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:43,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:17:43,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:43,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:43,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:43,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:43,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:17:43,545 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:17:43,546 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 23:17:44,314 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:17:44,314 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 23:17:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:17:44,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:17:44,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:44,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642833519] [2021-11-12 23:17:44,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642833519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:44,882 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:44,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:17:44,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846197563] [2021-11-12 23:17:44,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:44,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:17:44,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:44,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:17:44,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:44,883 INFO L87 Difference]: Start difference. First operand 1981 states and 3034 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:46,909 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 23:17:55,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:17:58,247 WARN L515 Checker$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 23:17:59,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:03,230 WARN L515 Checker$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 23:18:04,541 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 23:18:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:16,401 INFO L93 Difference]: Finished difference Result 5095 states and 7745 transitions. [2021-11-12 23:18:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:18:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-12 23:18:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:16,417 INFO L225 Difference]: With dead ends: 5095 [2021-11-12 23:18:16,417 INFO L226 Difference]: Without dead ends: 3124 [2021-11-12 23:18:16,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 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 23:18:16,420 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 206 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 67 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30617.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.54ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31281.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:16,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 528 Invalid, 530 Unknown, 0 Unchecked, 4.54ms Time], IncrementalHoareTripleChecker [67 Valid, 462 Invalid, 1 Unknown, 0 Unchecked, 31281.26ms Time] [2021-11-12 23:18:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-11-12 23:18:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 1981. [2021-11-12 23:18:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.5191919191919192) internal successors, (3008), 1980 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 23:18:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3008 transitions. [2021-11-12 23:18:16,563 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3008 transitions. Word has length 188 [2021-11-12 23:18:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:16,563 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3008 transitions. [2021-11-12 23:18:16,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3008 transitions. [2021-11-12 23:18:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-12 23:18:16,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:16,568 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:16,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:16,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:16,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1627778118, now seen corresponding path program 1 times [2021-11-12 23:18:16,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:16,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131435268] [2021-11-12 23:18:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:16,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:16,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:16,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:16,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:18:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:18:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:17,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:17,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:17,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:18,330 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:18:18,330 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 23:18:18,783 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:18:18,784 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 23:18:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:18:18,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:18:19,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:19,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131435268] [2021-11-12 23:18:19,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131435268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:19,370 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:19,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:18:19,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109732677] [2021-11-12 23:18:19,370 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:19,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:18:19,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:18:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:18:19,372 INFO L87 Difference]: Start difference. First operand 1981 states and 3008 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 23:18:21,426 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 23:18:23,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:32,532 WARN L515 Checker$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 23:18:35,351 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:37,427 WARN L515 Checker$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 23:18:49,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:51,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:18:53,785 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 23:18:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:53,970 INFO L93 Difference]: Finished difference Result 5311 states and 8026 transitions. [2021-11-12 23:18:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:18:53,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 189 [2021-11-12 23:18:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:53,991 INFO L225 Difference]: With dead ends: 5311 [2021-11-12 23:18:53,991 INFO L226 Difference]: Without dead ends: 3340 [2021-11-12 23:18:53,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 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 23:18:53,997 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 211 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 61 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33533.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.86ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34338.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:53,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 779 Invalid, 668 Unknown, 0 Unchecked, 4.86ms Time], IncrementalHoareTripleChecker [61 Valid, 603 Invalid, 4 Unknown, 0 Unchecked, 34338.47ms Time] [2021-11-12 23:18:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-11-12 23:18:54,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 2098. [2021-11-12 23:18:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 1.4992846924177397) internal successors, (3144), 2097 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states 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 23:18:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 3144 transitions. [2021-11-12 23:18:54,200 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 3144 transitions. Word has length 189 [2021-11-12 23:18:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:54,200 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 3144 transitions. [2021-11-12 23:18:54,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 23:18:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 3144 transitions. [2021-11-12 23:18:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 23:18:54,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:54,206 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:18:54,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:54,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:54,420 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:18:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:54,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1146228617, now seen corresponding path program 1 times [2021-11-12 23:18:54,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:54,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859305179] [2021-11-12 23:18:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:54,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:54,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:54,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:18:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:55,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:18:55,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:55,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:18:55,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:55,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:55,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:55,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:55,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:18:55,790 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:18:55,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 23:18:56,298 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:18:56,299 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 23:18:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:18:56,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:18:56,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:56,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859305179] [2021-11-12 23:18:56,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859305179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:56,915 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:56,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:18:56,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50517144] [2021-11-12 23:18:56,915 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:56,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:18:56,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:18:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:18:56,917 INFO L87 Difference]: Start difference. First operand 2098 states and 3144 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 23:18:58,945 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 23:19:02,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:07,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:09,483 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:12,975 WARN L515 Checker$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 23:19:14,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:15,467 WARN L515 Checker$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 23:19:16,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:29,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:30,734 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 23:19:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:31,347 INFO L93 Difference]: Finished difference Result 5425 states and 8125 transitions. [2021-11-12 23:19:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:19:31,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 190 [2021-11-12 23:19:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:31,353 INFO L225 Difference]: With dead ends: 5425 [2021-11-12 23:19:31,353 INFO L226 Difference]: Without dead ends: 3337 [2021-11-12 23:19:31,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 374 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 23:19:31,355 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 208 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33363.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34185.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:31,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 748 Invalid, 657 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [63 Valid, 593 Invalid, 1 Unknown, 0 Unchecked, 34185.54ms Time] [2021-11-12 23:19:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-11-12 23:19:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2114. [2021-11-12 23:19:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.4865120681495505) internal successors, (3141), 2113 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states 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 23:19:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3141 transitions. [2021-11-12 23:19:31,500 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3141 transitions. Word has length 190 [2021-11-12 23:19:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:31,500 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 3141 transitions. [2021-11-12 23:19:31,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 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 23:19:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3141 transitions. [2021-11-12 23:19:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 23:19:31,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:31,505 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:31,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:19:31,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:31,719 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1653439691, now seen corresponding path program 1 times [2021-11-12 23:19:31,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:31,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111479393] [2021-11-12 23:19:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:31,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:31,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:31,723 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:31,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:19:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:19:32,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:19:32,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:19:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:32,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:32,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:32,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:32,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:19:33,221 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:19:33,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-12 23:19:33,956 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:19:33,956 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 23:19:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:19:34,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:19:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:19:34,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:19:34,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111479393] [2021-11-12 23:19:34,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111479393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:19:34,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:19:34,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:19:34,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803311210] [2021-11-12 23:19:34,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:19:34,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:19:34,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:19:34,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:19:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:19:34,613 INFO L87 Difference]: Start difference. First operand 2114 states and 3141 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 23:19:36,638 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 23:19:42,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:56,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:19:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:19:58,830 INFO L93 Difference]: Finished difference Result 5271 states and 7842 transitions. [2021-11-12 23:19:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:19:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 191 [2021-11-12 23:19:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:19:58,838 INFO L225 Difference]: With dead ends: 5271 [2021-11-12 23:19:58,838 INFO L226 Difference]: Without dead ends: 3167 [2021-11-12 23:19:58,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 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 23:19:58,841 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 199 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23358.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.52ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23967.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:19:58,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 510 Invalid, 504 Unknown, 0 Unchecked, 3.52ms Time], IncrementalHoareTripleChecker [62 Valid, 441 Invalid, 1 Unknown, 0 Unchecked, 23967.08ms Time] [2021-11-12 23:19:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-11-12 23:19:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 2114. [2021-11-12 23:19:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.4699479413156649) internal successors, (3106), 2113 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states 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 23:19:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3106 transitions. [2021-11-12 23:19:58,980 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3106 transitions. Word has length 191 [2021-11-12 23:19:58,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:19:58,981 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 3106 transitions. [2021-11-12 23:19:58,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 23:19:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3106 transitions. [2021-11-12 23:19:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 23:19:58,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:19:58,995 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:19:59,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 23:19:59,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:19:59,211 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:19:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:19:59,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1981897227, now seen corresponding path program 1 times [2021-11-12 23:19:59,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:19:59,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657261919] [2021-11-12 23:19:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:19:59,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:19:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:19:59,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:19:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:19:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:19:59,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:19:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:00,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:00,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:00,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:00,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:00,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:00,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:00,515 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:20:00,515 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 23:20:01,340 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:20:01,341 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 23:20:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:20:01,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:20:01,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:01,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657261919] [2021-11-12 23:20:01,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657261919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:01,930 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:01,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:20:01,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109565132] [2021-11-12 23:20:01,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:01,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:20:01,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:01,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:20:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:20:01,931 INFO L87 Difference]: Start difference. First operand 2114 states and 3106 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:03,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:05,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:14,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:20,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:23,270 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 23:20:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:41,244 INFO L93 Difference]: Finished difference Result 5251 states and 7734 transitions. [2021-11-12 23:20:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:20:41,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-12 23:20:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:41,251 INFO L225 Difference]: With dead ends: 5251 [2021-11-12 23:20:41,251 INFO L226 Difference]: Without dead ends: 3383 [2021-11-12 23:20:41,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 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 23:20:41,253 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 181 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 42 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38172.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.73ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39044.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:41,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1152 Invalid, 699 Unknown, 0 Unchecked, 4.73ms Time], IncrementalHoareTripleChecker [42 Valid, 654 Invalid, 3 Unknown, 0 Unchecked, 39044.56ms Time] [2021-11-12 23:20:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-11-12 23:20:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 2293. [2021-11-12 23:20:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 1.448952879581152) internal successors, (3321), 2292 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states 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 23:20:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3321 transitions. [2021-11-12 23:20:41,380 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3321 transitions. Word has length 191 [2021-11-12 23:20:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:41,380 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 3321 transitions. [2021-11-12 23:20:41,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3321 transitions. [2021-11-12 23:20:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 23:20:41,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:41,386 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:41,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-12 23:20:41,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:41,599 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:41,599 INFO L85 PathProgramCache]: Analyzing trace with hash 468579752, now seen corresponding path program 1 times [2021-11-12 23:20:41,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:41,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93152477] [2021-11-12 23:20:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:41,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:41,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:41,602 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:41,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:20:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:42,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:20:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:20:42,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:42,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:42,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:42,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:42,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:20:42,971 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:20:42,972 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 23:20:43,789 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:20:43,789 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 23:20:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:20:43,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:20:44,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:44,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93152477] [2021-11-12 23:20:44,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93152477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:44,429 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:44,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:20:44,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492570697] [2021-11-12 23:20:44,429 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:44,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:20:44,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:20:44,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:20:44,431 INFO L87 Difference]: Start difference. First operand 2293 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:20:46,465 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 23:20:54,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:57,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:20:58,949 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 23:21:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:10,482 INFO L93 Difference]: Finished difference Result 5421 states and 7911 transitions. [2021-11-12 23:21:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:21:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-12 23:21:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:10,489 INFO L225 Difference]: With dead ends: 5421 [2021-11-12 23:21:10,489 INFO L226 Difference]: Without dead ends: 3394 [2021-11-12 23:21:10,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 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 23:21:10,492 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 186 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25177.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.21ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25782.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:10,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 505 Invalid, 502 Unknown, 0 Unchecked, 3.21ms Time], IncrementalHoareTripleChecker [60 Valid, 441 Invalid, 1 Unknown, 0 Unchecked, 25782.75ms Time] [2021-11-12 23:21:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2021-11-12 23:21:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 2321. [2021-11-12 23:21:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 1.4400862068965516) internal successors, (3341), 2320 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states 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 23:21:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3341 transitions. [2021-11-12 23:21:10,676 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3341 transitions. Word has length 192 [2021-11-12 23:21:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:10,676 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3341 transitions. [2021-11-12 23:21:10,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3341 transitions. [2021-11-12 23:21:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-12 23:21:10,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:10,682 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:10,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:10,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:10,898 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2055877882, now seen corresponding path program 1 times [2021-11-12 23:21:10,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:10,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989756844] [2021-11-12 23:21:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:10,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:10,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:10,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:10,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:21:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:11,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:21:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:11,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:11,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:11,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:12,184 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:21:12,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 23:21:13,064 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:21:13,064 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 23:21:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:21:13,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:21:13,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:13,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989756844] [2021-11-12 23:21:13,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989756844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:13,683 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:13,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:21:13,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274484538] [2021-11-12 23:21:13,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:13,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:21:13,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:13,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:21:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:21:13,685 INFO L87 Difference]: Start difference. First operand 2321 states and 3341 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:15,724 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 23:21:21,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:34,817 WARN L515 Checker$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 23:21:36,592 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:37,740 INFO L93 Difference]: Finished difference Result 5590 states and 8086 transitions. [2021-11-12 23:21:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:21:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-12 23:21:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:37,748 INFO L225 Difference]: With dead ends: 5590 [2021-11-12 23:21:37,749 INFO L226 Difference]: Without dead ends: 3548 [2021-11-12 23:21:37,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 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 23:21:37,751 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 181 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23178.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23768.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:37,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 516 Invalid, 504 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [59 Valid, 444 Invalid, 1 Unknown, 0 Unchecked, 23768.26ms Time] [2021-11-12 23:21:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-11-12 23:21:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 2518. [2021-11-12 23:21:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.4199443782280492) internal successors, (3574), 2517 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states 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 23:21:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3574 transitions. [2021-11-12 23:21:37,957 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3574 transitions. Word has length 193 [2021-11-12 23:21:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:37,958 INFO L470 AbstractCegarLoop]: Abstraction has 2518 states and 3574 transitions. [2021-11-12 23:21:37,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:21:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3574 transitions. [2021-11-12 23:21:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-12 23:21:37,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:37,963 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:37,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-12 23:21:38,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:38,183 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash 967910484, now seen corresponding path program 1 times [2021-11-12 23:21:38,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:38,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688409280] [2021-11-12 23:21:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:38,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:38,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:38,185 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:38,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:21:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:39,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:21:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:21:39,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:39,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:39,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:39,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:39,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:21:39,531 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:21:39,532 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 23:21:40,464 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:21:40,464 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 107 treesize of output 35 [2021-11-12 23:21:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:21:40,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:21:41,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:41,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688409280] [2021-11-12 23:21:41,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688409280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:41,073 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:41,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:21:41,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721768441] [2021-11-12 23:21:41,074 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:41,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:21:41,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:21:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:21:41,075 INFO L87 Difference]: Start difference. First operand 2518 states and 3574 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 23:21:43,094 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 23:21:55,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:21:58,245 WARN L515 Checker$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 23:22:07,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:08,761 INFO L93 Difference]: Finished difference Result 6210 states and 8865 transitions. [2021-11-12 23:22:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:22:08,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 196 [2021-11-12 23:22:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:08,768 INFO L225 Difference]: With dead ends: 6210 [2021-11-12 23:22:08,768 INFO L226 Difference]: Without dead ends: 3713 [2021-11-12 23:22:08,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 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 23:22:08,771 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 178 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26786.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27391.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:08,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 531 Invalid, 496 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [59 Valid, 436 Invalid, 1 Unknown, 0 Unchecked, 27391.17ms Time] [2021-11-12 23:22:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-11-12 23:22:08,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2702. [2021-11-12 23:22:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2702 states, 2701 states have (on average 1.402443539429841) internal successors, (3788), 2701 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states 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 23:22:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 3788 transitions. [2021-11-12 23:22:08,995 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 3788 transitions. Word has length 196 [2021-11-12 23:22:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:08,996 INFO L470 AbstractCegarLoop]: Abstraction has 2702 states and 3788 transitions. [2021-11-12 23:22:08,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 23:22:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 3788 transitions. [2021-11-12 23:22:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 23:22:09,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:09,001 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:09,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:09,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:09,219 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1968533010, now seen corresponding path program 1 times [2021-11-12 23:22:09,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:09,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094787312] [2021-11-12 23:22:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:09,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:09,221 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:09,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:22:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:22:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:10,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:10,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:10,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:10,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:10,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:10,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:10,595 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:22:10,595 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 23:22:11,659 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:22:11,659 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 23:22:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:22:11,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:22:12,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:12,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094787312] [2021-11-12 23:22:12,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094787312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:12,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:12,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:22:12,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788850323] [2021-11-12 23:22:12,274 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:12,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:22:12,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:12,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:22:12,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:22:12,275 INFO L87 Difference]: Start difference. First operand 2702 states and 3788 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 23:22:14,294 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 23:22:26,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:30,138 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:38,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:39,990 WARN L515 Checker$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 23:22:41,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:22:42,720 INFO L93 Difference]: Finished difference Result 6340 states and 8977 transitions. [2021-11-12 23:22:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:22:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 197 [2021-11-12 23:22:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:22:42,724 INFO L225 Difference]: With dead ends: 6340 [2021-11-12 23:22:42,725 INFO L226 Difference]: Without dead ends: 3659 [2021-11-12 23:22:42,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 388 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 23:22:42,727 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 171 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29428.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.34ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30140.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:22:42,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 646 Invalid, 619 Unknown, 0 Unchecked, 3.34ms Time], IncrementalHoareTripleChecker [61 Valid, 557 Invalid, 1 Unknown, 0 Unchecked, 30140.55ms Time] [2021-11-12 23:22:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3659 states. [2021-11-12 23:22:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3659 to 2710. [2021-11-12 23:22:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 1.394610557401255) internal successors, (3778), 2709 states have internal predecessors, (3778), 0 states have call successors, (0), 0 states 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 23:22:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 3778 transitions. [2021-11-12 23:22:42,968 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 3778 transitions. Word has length 197 [2021-11-12 23:22:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:22:42,968 INFO L470 AbstractCegarLoop]: Abstraction has 2710 states and 3778 transitions. [2021-11-12 23:22:42,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 23:22:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 3778 transitions. [2021-11-12 23:22:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 23:22:42,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:22:42,974 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:22:43,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:22:43,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:22:43,187 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:22:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:22:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash -522942010, now seen corresponding path program 1 times [2021-11-12 23:22:43,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:22:43,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501863737] [2021-11-12 23:22:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:22:43,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:22:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:22:43,190 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:22:43,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:22:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:22:43,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:22:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:44,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:22:44,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:44,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:44,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:44,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:44,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:22:44,421 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-12 23:22:44,422 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 23:22:45,626 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:22:45,626 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 23:22:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:22:45,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:22:46,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:22:46,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501863737] [2021-11-12 23:22:46,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501863737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:22:46,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:22:46,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:22:46,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042915527] [2021-11-12 23:22:46,280 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:22:46,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:22:46,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:22:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:22:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:22:46,281 INFO L87 Difference]: Start difference. First operand 2710 states and 3778 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 23:22:48,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:51,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:22:57,270 WARN L515 Checker$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 23:22:59,180 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:09,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:15,863 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 23:23:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:20,086 INFO L93 Difference]: Finished difference Result 6299 states and 8877 transitions. [2021-11-12 23:23:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:23:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 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 197 [2021-11-12 23:23:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:20,091 INFO L225 Difference]: With dead ends: 6299 [2021-11-12 23:23:20,091 INFO L226 Difference]: Without dead ends: 3610 [2021-11-12 23:23:20,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 388 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 23:23:20,095 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 159 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 60 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32774.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33493.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:20,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 645 Invalid, 612 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [60 Valid, 549 Invalid, 3 Unknown, 0 Unchecked, 33493.87ms Time] [2021-11-12 23:23:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-11-12 23:23:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2727. [2021-11-12 23:23:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.3917828319882612) internal successors, (3794), 2726 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states 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 23:23:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3794 transitions. [2021-11-12 23:23:20,330 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3794 transitions. Word has length 197 [2021-11-12 23:23:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:20,331 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3794 transitions. [2021-11-12 23:23:20,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 23:23:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3794 transitions. [2021-11-12 23:23:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-12 23:23:20,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:20,336 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:20,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:20,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:20,556 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1162661829, now seen corresponding path program 1 times [2021-11-12 23:23:20,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:20,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841153863] [2021-11-12 23:23:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:20,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:20,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:20,559 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:20,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bbaf2733-f77c-47fd-bbd2-c72f4872ab49/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:23:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:21,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:21,471 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 162 treesize of output 138 [2021-11-12 23:23:21,475 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 138 treesize of output 90 [2021-11-12 23:23:21,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:21,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:21,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:23:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:23:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver