./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:24:34,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:24:34,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:24:34,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:24:34,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:24:34,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:24:34,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:24:34,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:24:34,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:24:34,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:24:34,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:24:34,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:24:34,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:24:34,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:24:34,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:24:34,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:24:34,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:24:34,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:24:34,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:24:34,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:24:34,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:24:34,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:24:34,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:24:34,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:24:34,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:24:34,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:24:34,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:24:34,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:24:34,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:24:34,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:24:34,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:24:34,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:24:34,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:24:34,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:24:34,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:24:34,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:24:34,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:24:34,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:24:34,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:24:34,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:24:34,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:24:34,376 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:24:34,406 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:24:34,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:24:34,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:24:34,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:24:34,408 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:24:34,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:24:34,408 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:24:34,409 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:24:34,409 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:24:34,409 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:24:34,409 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:24:34,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:24:34,410 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:24:34,410 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:24:34,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:24:34,411 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:24:34,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:24:34,412 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:24:34,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:24:34,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:24:34,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:24:34,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:24:34,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:24:34,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:24:34,414 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:24:34,414 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:24:34,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:24:34,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:24:34,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:24:34,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:24:34,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:24:34,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:24:34,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:24:34,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:24:34,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:24:34,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:24:34,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:24:34,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:24:34,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:24:34,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:24:34,418 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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-12 22:24:34,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:24:34,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:24:34,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:24:34,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:24:34,774 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:24:34,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-12 22:24:34,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data/075430d4a/47d441bb61d848f69e5dfa983f223675/FLAG6d929685e [2021-11-12 22:24:35,610 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:24:35,611 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-12 22:24:35,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data/075430d4a/47d441bb61d848f69e5dfa983f223675/FLAG6d929685e [2021-11-12 22:24:35,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data/075430d4a/47d441bb61d848f69e5dfa983f223675 [2021-11-12 22:24:35,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:24:35,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:24:35,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:35,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:24:35,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:24:35,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:35" (1/1) ... [2021-11-12 22:24:35,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333e3e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:35, skipping insertion in model container [2021-11-12 22:24:35,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:35" (1/1) ... [2021-11-12 22:24:35,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:24:35,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:24:36,359 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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-12 22:24:36,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:36,404 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 22:24:36,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a2111a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:36, skipping insertion in model container [2021-11-12 22:24:36,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:36,405 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:24:36,408 INFO L158 Benchmark]: Toolchain (without parser) took 630.34ms. Allocated memory was 81.8MB in the beginning and 134.2MB in the end (delta: 52.4MB). Free memory was 41.6MB in the beginning and 93.6MB in the end (delta: -52.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 22:24:36,409 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 81.8MB. Free memory is still 60.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:24:36,410 INFO L158 Benchmark]: CACSL2BoogieTranslator took 625.78ms. Allocated memory was 81.8MB in the beginning and 134.2MB in the end (delta: 52.4MB). Free memory was 41.4MB in the beginning and 93.6MB in the end (delta: -52.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 22:24:36,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 81.8MB. Free memory is still 60.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 625.78ms. Allocated memory was 81.8MB in the beginning and 134.2MB in the end (delta: 52.4MB). Free memory was 41.4MB in the beginning and 93.6MB in the end (delta: -52.2MB). Peak memory consumption was 6.3MB. 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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:24:38,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:24:38,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:24:38,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:24:39,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:24:39,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:24:39,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:24:39,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:24:39,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:24:39,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:24:39,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:24:39,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:24:39,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:24:39,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:24:39,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:24:39,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:24:39,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:24:39,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:24:39,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:24:39,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:24:39,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:24:39,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:24:39,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:24:39,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:24:39,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:24:39,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:24:39,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:24:39,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:24:39,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:24:39,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:24:39,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:24:39,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:24:39,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:24:39,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:24:39,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:24:39,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:24:39,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:24:39,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:24:39,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:24:39,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:24:39,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:24:39,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:24:39,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:24:39,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:24:39,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:24:39,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:24:39,155 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:24:39,155 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:24:39,155 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:24:39,155 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:24:39,156 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:24:39,156 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:24:39,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:24:39,159 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:24:39,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:24:39,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:24:39,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:24:39,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:24:39,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:24:39,160 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:24:39,160 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:24:39,161 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:24:39,161 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:24:39,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:24:39,161 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:24:39,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:24:39,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:24:39,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:24:39,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:24:39,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:24:39,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:24:39,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:24:39,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:24:39,164 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:24:39,164 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:39,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:24:39,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:24:39,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:24:39,166 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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-12 22:24:39,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:24:39,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:24:39,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:24:39,629 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:24:39,630 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:24:39,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-12 22:24:39,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data/435aec0d9/e93ec48836cf428f8be169e4b1ec4474/FLAG2e0bd1004 [2021-11-12 22:24:40,432 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:24:40,433 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-12 22:24:40,458 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data/435aec0d9/e93ec48836cf428f8be169e4b1ec4474/FLAG2e0bd1004 [2021-11-12 22:24:40,657 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/data/435aec0d9/e93ec48836cf428f8be169e4b1ec4474 [2021-11-12 22:24:40,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:24:40,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:24:40,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:40,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:24:40,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:24:40,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:40" (1/1) ... [2021-11-12 22:24:40,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72782d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:40, skipping insertion in model container [2021-11-12 22:24:40,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:40" (1/1) ... [2021-11-12 22:24:40,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:24:40,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:24:41,413 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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-12 22:24:41,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:41,467 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:24:41,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:24:41,634 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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-12 22:24:41,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:41,656 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:24:41,802 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_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-12 22:24:41,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:41,824 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:24:41,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41 WrapperNode [2021-11-12 22:24:41,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:41,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:24:41,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:24:41,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:24:41,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:41,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:41,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:24:41,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:24:41,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:24:41,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:24:41,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:41,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:41,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:41,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:42,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:42,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:42,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:42,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:24:42,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:24:42,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:24:42,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:24:42,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (1/1) ... [2021-11-12 22:24:42,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:24:42,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:42,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:24:42,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:24:42,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:24:42,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:24:42,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:24:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:24:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:24:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:24:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:24:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:24:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:24:42,385 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 22:24:51,619 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 22:24:51,620 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 22:24:51,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:24:51,634 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:24:51,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:24:51 BoogieIcfgContainer [2021-11-12 22:24:51,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:24:51,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:24:51,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:24:51,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:24:51,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:24:40" (1/3) ... [2021-11-12 22:24:51,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613010a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:24:51, skipping insertion in model container [2021-11-12 22:24:51,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:41" (2/3) ... [2021-11-12 22:24:51,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613010a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:24:51, skipping insertion in model container [2021-11-12 22:24:51,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:24:51" (3/3) ... [2021-11-12 22:24:51,646 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2021-11-12 22:24:51,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:24:51,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:24:51,733 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:24:51,754 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 22:24:51,755 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:24:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:24:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-12 22:24:51,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:51,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:51,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2021-11-12 22:24:51,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:51,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255437507] [2021-11-12 22:24:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:51,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:51,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:51,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:24:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:52,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:24:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:52,568 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 22:24:52,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:52,898 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 22:24:52,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:52,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255437507] [2021-11-12 22:24:52,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255437507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:52,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:52,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:24:52,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654925300] [2021-11-12 22:24:52,903 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:52,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:24:52,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:24:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:24:52,943 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 22:24:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:53,103 INFO L93 Difference]: Finished difference Result 542 states and 920 transitions. [2021-11-12 22:24:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:53,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 47 [2021-11-12 22:24:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:53,127 INFO L225 Difference]: With dead ends: 542 [2021-11-12 22:24:53,130 INFO L226 Difference]: Without dead ends: 368 [2021-11-12 22:24:53,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 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 22:24:53,145 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 370 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.37ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:53,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 667 Invalid, 37 Unknown, 0 Unchecked, 11.37ms Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 75.02ms Time] [2021-11-12 22:24:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-12 22:24:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2021-11-12 22:24:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5231607629427792) internal successors, (559), 367 states have internal predecessors, (559), 0 states have call successors, (0), 0 states 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 22:24:53,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 559 transitions. [2021-11-12 22:24:53,223 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 559 transitions. Word has length 47 [2021-11-12 22:24:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:53,224 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 559 transitions. [2021-11-12 22:24:53,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 22:24:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 559 transitions. [2021-11-12 22:24:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:24:53,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:53,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:53,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:53,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:53,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:53,441 INFO L85 PathProgramCache]: Analyzing trace with hash -483730754, now seen corresponding path program 1 times [2021-11-12 22:24:53,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:53,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202356215] [2021-11-12 22:24:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:53,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:53,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:53,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:53,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:24:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:53,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:24:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:54,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:54,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:54,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202356215] [2021-11-12 22:24:54,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202356215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:54,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:54,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:24:54,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253438588] [2021-11-12 22:24:54,414 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:54,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:24:54,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:24:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:24:54,417 INFO L87 Difference]: Start difference. First operand 368 states and 559 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 22:24:54,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:54,527 INFO L93 Difference]: Finished difference Result 723 states and 1103 transitions. [2021-11-12 22:24:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:24:54,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-12 22:24:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:54,533 INFO L225 Difference]: With dead ends: 723 [2021-11-12 22:24:54,533 INFO L226 Difference]: Without dead ends: 484 [2021-11-12 22:24:54,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:24:54,537 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:54,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 557 Invalid, 16 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 84.41ms Time] [2021-11-12 22:24:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-12 22:24:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-11-12 22:24:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 483 states have internal predecessors, (734), 0 states have call successors, (0), 0 states 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 22:24:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 734 transitions. [2021-11-12 22:24:54,579 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 734 transitions. Word has length 87 [2021-11-12 22:24:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:54,579 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 734 transitions. [2021-11-12 22:24:54,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 22:24:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 734 transitions. [2021-11-12 22:24:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 22:24:54,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:54,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:24:54,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:54,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:54,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash 595564554, now seen corresponding path program 1 times [2021-11-12 22:24:54,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:54,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665154014] [2021-11-12 22:24:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:54,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:54,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:54,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:54,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:24:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:24:55,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:24:55,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:24:55,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:55,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665154014] [2021-11-12 22:24:55,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665154014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:55,820 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:55,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:24:55,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521263452] [2021-11-12 22:24:55,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:55,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:24:55,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:24:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:24:55,822 INFO L87 Difference]: Start difference. First operand 484 states and 734 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 22:24:56,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:56,013 INFO L93 Difference]: Finished difference Result 1074 states and 1637 transitions. [2021-11-12 22:24:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:24:56,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 109 [2021-11-12 22:24:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:56,022 INFO L225 Difference]: With dead ends: 1074 [2021-11-12 22:24:56,022 INFO L226 Difference]: Without dead ends: 719 [2021-11-12 22:24:56,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 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 22:24:56,030 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 324 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:56,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 724 Invalid, 35 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 151.27ms Time] [2021-11-12 22:24:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-12 22:24:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-12 22:24:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5181058495821727) internal successors, (1090), 718 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states 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 22:24:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1090 transitions. [2021-11-12 22:24:56,107 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1090 transitions. Word has length 109 [2021-11-12 22:24:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:56,108 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1090 transitions. [2021-11-12 22:24:56,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 22:24:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1090 transitions. [2021-11-12 22:24:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 22:24:56,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:56,130 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:56,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:56,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:56,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash -65336556, now seen corresponding path program 1 times [2021-11-12 22:24:56,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:56,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324910754] [2021-11-12 22:24:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:56,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:56,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:56,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:56,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:24:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:24:57,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:57,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 22:24:57,079 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 22:24:57,166 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:57,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-12 22:24:57,185 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 169 treesize of output 158 [2021-11-12 22:24:57,731 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 22:24:57,732 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 797 treesize of output 769 [2021-11-12 22:24:57,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:57,813 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-12 22:24:57,824 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 169 treesize of output 158 [2021-11-12 22:24:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:57,954 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 77 treesize of output 49 [2021-11-12 22:24:58,086 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 22:24:58,087 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 22:24:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:24:58,125 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 22:24:58,160 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 22:24:58,166 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 22:24:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-12 22:24:58,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:59,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:59,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 22:24:59,208 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:59,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 22:24:59,362 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:59,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-12 22:24:59,380 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:59,382 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 404 [2021-11-12 22:24:59,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:59,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 461 [2021-11-12 22:24:59,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:24:59,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 578 [2021-11-12 22:24:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-12 22:24:59,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:59,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324910754] [2021-11-12 22:24:59,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324910754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:59,718 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:59,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:24:59,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792902093] [2021-11-12 22:24:59,719 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:24:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:24:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:24:59,730 INFO L87 Difference]: Start difference. First operand 719 states and 1090 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:01,769 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 22:25:03,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:12,449 WARN L515 Checker$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 22:25:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:13,223 INFO L93 Difference]: Finished difference Result 1435 states and 2176 transitions. [2021-11-12 22:25:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:25:13,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-12 22:25:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:13,232 INFO L225 Difference]: With dead ends: 1435 [2021-11-12 22:25:13,232 INFO L226 Difference]: Without dead ends: 719 [2021-11-12 22:25:13,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:25:13,238 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13012.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 13353.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:13,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 967 Invalid, 232 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 2 Unknown, 58 Unchecked, 13353.71ms Time] [2021-11-12 22:25:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-12 22:25:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-12 22:25:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5167130919220055) internal successors, (1089), 718 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states 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 22:25:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1089 transitions. [2021-11-12 22:25:13,284 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1089 transitions. Word has length 150 [2021-11-12 22:25:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:13,285 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1089 transitions. [2021-11-12 22:25:13,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:25:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1089 transitions. [2021-11-12 22:25:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 22:25:13,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:13,289 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:13,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:13,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:13,505 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash -329984046, now seen corresponding path program 1 times [2021-11-12 22:25:13,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:13,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950942313] [2021-11-12 22:25:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:13,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:13,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:13,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:13,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:25:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:25:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:14,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:25:14,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:25:14,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:25:14,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:25:14,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:25:14,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:25:14,879 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:25:14,880 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 76 [2021-11-12 22:25:16,444 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:25:16,445 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 109 treesize of output 37 [2021-11-12 22:25:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:25:16,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:25:17,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:17,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950942313] [2021-11-12 22:25:17,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950942313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:17,167 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:25:17,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:25:17,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283701875] [2021-11-12 22:25:17,168 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:17,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:25:17,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:17,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:25:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:25:17,169 INFO L87 Difference]: Start difference. First operand 719 states and 1089 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 22:25:19,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:21,682 WARN L515 Checker$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 22:25:31,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:36,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:39,115 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:44,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:55,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:57,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:01,212 INFO L93 Difference]: Finished difference Result 2592 states and 3954 transitions. [2021-11-12 22:26:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:26:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 150 [2021-11-12 22:26:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:01,228 INFO L225 Difference]: With dead ends: 2592 [2021-11-12 22:26:01,228 INFO L226 Difference]: Without dead ends: 1883 [2021-11-12 22:26:01,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:26:01,231 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 237 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42746.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.51ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43824.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:01,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 795 Invalid, 801 Unknown, 0 Unchecked, 10.51ms Time], IncrementalHoareTripleChecker [71 Valid, 729 Invalid, 1 Unknown, 0 Unchecked, 43824.53ms Time] [2021-11-12 22:26:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-11-12 22:26:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 851. [2021-11-12 22:26:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.5494117647058823) internal successors, (1317), 850 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states 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 22:26:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1317 transitions. [2021-11-12 22:26:01,292 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1317 transitions. Word has length 150 [2021-11-12 22:26:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:01,294 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1317 transitions. [2021-11-12 22:26:01,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 22:26:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1317 transitions. [2021-11-12 22:26:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 22:26:01,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:01,299 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:01,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:01,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:01,504 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1210495758, now seen corresponding path program 1 times [2021-11-12 22:26:01,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:01,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402554181] [2021-11-12 22:26:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:01,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:01,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:01,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:01,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:26:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:26:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:02,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:02,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:02,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:02,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:02,695 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:26:02,696 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 76 [2021-11-12 22:26:04,129 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:26:04,129 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 109 treesize of output 37 [2021-11-12 22:26:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:26:04,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 22:26:04,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:04,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402554181] [2021-11-12 22:26:04,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402554181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:04,760 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:04,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:26:04,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834907306] [2021-11-12 22:26:04,761 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:04,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:04,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:26:04,762 INFO L87 Difference]: Start difference. First operand 851 states and 1317 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:06,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:08,798 WARN L515 Checker$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 22:26:10,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:11,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:16,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:18,407 WARN L515 Checker$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 22:26:20,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:21,805 WARN L515 Checker$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 22:26:25,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:26,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:28,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:32,271 WARN L515 Checker$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 22:26:34,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:35,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:37,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:44,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:45,788 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 22:26:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:49,516 INFO L93 Difference]: Finished difference Result 2807 states and 4330 transitions. [2021-11-12 22:26:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:26:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-12 22:26:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:49,532 INFO L225 Difference]: With dead ends: 2807 [2021-11-12 22:26:49,532 INFO L226 Difference]: Without dead ends: 1966 [2021-11-12 22:26:49,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 296 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 22:26:49,535 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 228 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43630.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.69ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44546.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:49,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 589 Invalid, 618 Unknown, 0 Unchecked, 7.69ms Time], IncrementalHoareTripleChecker [73 Valid, 543 Invalid, 2 Unknown, 0 Unchecked, 44546.89ms Time] [2021-11-12 22:26:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-11-12 22:26:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 967. [2021-11-12 22:26:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 1.5714285714285714) internal successors, (1518), 966 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states 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 22:26:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1518 transitions. [2021-11-12 22:26:49,617 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1518 transitions. Word has length 151 [2021-11-12 22:26:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:49,618 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1518 transitions. [2021-11-12 22:26:49,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1518 transitions. [2021-11-12 22:26:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-12 22:26:49,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:49,622 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:49,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:49,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:49,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:49,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1783349868, now seen corresponding path program 1 times [2021-11-12 22:26:49,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:49,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317956996] [2021-11-12 22:26:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:49,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:49,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:49,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:49,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:26:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:26:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:50,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:26:50,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:50,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:50,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:50,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:50,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:26:51,165 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:26:51,165 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 76 [2021-11-12 22:26:52,209 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:26:52,209 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 109 treesize of output 37 [2021-11-12 22:26:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:26:52,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:26:52,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:52,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317956996] [2021-11-12 22:26:52,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317956996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:52,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:52,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:26:52,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425555662] [2021-11-12 22:26:52,898 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:52,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:52,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:52,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:26:52,900 INFO L87 Difference]: Start difference. First operand 967 states and 1518 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 22:26:54,925 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 22:26:56,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:02,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:14,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:16,251 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:19,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:27,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:30,400 INFO L93 Difference]: Finished difference Result 2921 states and 4538 transitions. [2021-11-12 22:27:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:27:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 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 167 [2021-11-12 22:27:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:30,416 INFO L225 Difference]: With dead ends: 2921 [2021-11-12 22:27:30,416 INFO L226 Difference]: Without dead ends: 2104 [2021-11-12 22:27:30,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 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 22:27:30,418 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 226 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36346.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.76ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37303.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:30,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 833 Invalid, 601 Unknown, 0 Unchecked, 6.76ms Time], IncrementalHoareTripleChecker [52 Valid, 548 Invalid, 1 Unknown, 0 Unchecked, 37303.32ms Time] [2021-11-12 22:27:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-12 22:27:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1081. [2021-11-12 22:27:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.5787037037037037) internal successors, (1705), 1080 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states 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 22:27:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1705 transitions. [2021-11-12 22:27:30,486 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1705 transitions. Word has length 167 [2021-11-12 22:27:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:30,487 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1705 transitions. [2021-11-12 22:27:30,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 22:27:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1705 transitions. [2021-11-12 22:27:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 22:27:30,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:30,491 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:30,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:30,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:30,708 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash 113892171, now seen corresponding path program 1 times [2021-11-12 22:27:30,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:30,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770521288] [2021-11-12 22:27:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:30,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:30,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:30,711 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:30,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:27:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:31,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:27:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:27:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:27:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:27:31,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:27:31,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:27:31,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:27:31,836 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:27:31,836 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 76 [2021-11-12 22:27:32,938 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:27:32,939 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 109 treesize of output 37 [2021-11-12 22:27:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:27:33,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:27:33,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:33,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770521288] [2021-11-12 22:27:33,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770521288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:33,643 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:33,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:27:33,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098266015] [2021-11-12 22:27:33,644 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:33,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:27:33,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:27:33,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:27:33,645 INFO L87 Difference]: Start difference. First operand 1081 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 22:27:35,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:37,696 WARN L515 Checker$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 22:27:39,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:41,716 WARN L515 Checker$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 22:27:43,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:47,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:51,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:01,334 WARN L515 Checker$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 22:28:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:11,190 INFO L93 Difference]: Finished difference Result 3141 states and 4889 transitions. [2021-11-12 22:28:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:28:11,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 168 [2021-11-12 22:28:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:11,206 INFO L225 Difference]: With dead ends: 3141 [2021-11-12 22:28:11,206 INFO L226 Difference]: Without dead ends: 2229 [2021-11-12 22:28:11,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 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 22:28:11,209 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 231 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 69 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36448.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.47ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37321.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:11,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 585 Invalid, 610 Unknown, 0 Unchecked, 5.47ms Time], IncrementalHoareTripleChecker [69 Valid, 537 Invalid, 4 Unknown, 0 Unchecked, 37321.96ms Time] [2021-11-12 22:28:11,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-11-12 22:28:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1212. [2021-11-12 22:28:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.583815028901734) internal successors, (1918), 1211 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states 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 22:28:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1918 transitions. [2021-11-12 22:28:11,295 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1918 transitions. Word has length 168 [2021-11-12 22:28:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:11,296 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1918 transitions. [2021-11-12 22:28:11,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 22:28:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1918 transitions. [2021-11-12 22:28:11,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 22:28:11,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:11,301 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:11,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:11,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:11,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:11,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash 137677863, now seen corresponding path program 1 times [2021-11-12 22:28:11,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:11,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552711260] [2021-11-12 22:28:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:11,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:11,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:11,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:11,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:28:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:12,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:28:12,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:12,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:12,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:12,764 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:28:12,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 76 [2021-11-12 22:28:13,923 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:28:13,924 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 109 treesize of output 37 [2021-11-12 22:28:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:28:14,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:28:14,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:14,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552711260] [2021-11-12 22:28:14,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552711260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:14,586 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:28:14,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:28:14,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341083419] [2021-11-12 22:28:14,587 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:14,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:28:14,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:28:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:28:14,588 INFO L87 Difference]: Start difference. First operand 1212 states and 1918 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:16,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:19,105 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:23,509 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:30,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:32,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:33,908 WARN L515 Checker$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 22:28:39,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:41,307 WARN L515 Checker$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 22:28:42,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:48,820 WARN L515 Checker$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 22:28:51,529 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:54,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:54,283 INFO L93 Difference]: Finished difference Result 3347 states and 5214 transitions. [2021-11-12 22:28:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:28:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-12 22:28:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:54,295 INFO L225 Difference]: With dead ends: 3347 [2021-11-12 22:28:54,295 INFO L226 Difference]: Without dead ends: 2335 [2021-11-12 22:28:54,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 332 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 22:28:54,297 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 226 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 70 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38593.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.75ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39470.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:54,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 561 Invalid, 598 Unknown, 0 Unchecked, 4.75ms Time], IncrementalHoareTripleChecker [70 Valid, 525 Invalid, 3 Unknown, 0 Unchecked, 39470.15ms Time] [2021-11-12 22:28:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-11-12 22:28:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1338. [2021-11-12 22:28:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 1.5833956619296934) internal successors, (2117), 1337 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states 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 22:28:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2117 transitions. [2021-11-12 22:28:54,406 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2117 transitions. Word has length 169 [2021-11-12 22:28:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:54,406 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 2117 transitions. [2021-11-12 22:28:54,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:28:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2117 transitions. [2021-11-12 22:28:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 22:28:54,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:54,412 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:54,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:54,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:54,628 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2080444553, now seen corresponding path program 1 times [2021-11-12 22:28:54,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:54,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845850817] [2021-11-12 22:28:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:54,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:54,632 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:54,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:28:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:55,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:28:55,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:28:55,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:55,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:55,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:55,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:55,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:28:55,805 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:28:55,805 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 76 [2021-11-12 22:28:57,661 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:28:57,662 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 109 treesize of output 37 [2021-11-12 22:28:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:28:57,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:28:58,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:58,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845850817] [2021-11-12 22:28:58,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845850817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:58,432 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:28:58,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:28:58,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753179433] [2021-11-12 22:28:58,433 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:58,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:28:58,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:28:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:28:58,434 INFO L87 Difference]: Start difference. First operand 1338 states and 2117 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 22:29:00,462 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 22:29:02,495 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:06,878 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:10,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:18,245 WARN L515 Checker$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 22:29:24,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:31,121 WARN L515 Checker$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 22:29:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:33,786 INFO L93 Difference]: Finished difference Result 3679 states and 5736 transitions. [2021-11-12 22:29:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 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 179 [2021-11-12 22:29:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:33,802 INFO L225 Difference]: With dead ends: 3679 [2021-11-12 22:29:33,802 INFO L226 Difference]: Without dead ends: 2362 [2021-11-12 22:29:33,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 22:29:33,805 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 176 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34267.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.73ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35123.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:33,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 809 Invalid, 540 Unknown, 0 Unchecked, 4.73ms Time], IncrementalHoareTripleChecker [38 Valid, 499 Invalid, 3 Unknown, 0 Unchecked, 35123.95ms Time] [2021-11-12 22:29:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-11-12 22:29:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1536. [2021-11-12 22:29:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 1.5941368078175895) internal successors, (2447), 1535 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states 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 22:29:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2447 transitions. [2021-11-12 22:29:33,901 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2447 transitions. Word has length 179 [2021-11-12 22:29:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:33,902 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 2447 transitions. [2021-11-12 22:29:33,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 22:29:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2447 transitions. [2021-11-12 22:29:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-12 22:29:33,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:33,908 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:29:33,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:34,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:34,124 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:34,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:34,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1105638902, now seen corresponding path program 1 times [2021-11-12 22:29:34,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:34,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088328347] [2021-11-12 22:29:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:34,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:34,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:34,126 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:34,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:29:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:34,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:29:34,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:35,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:29:35,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:29:35,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:29:35,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:29:35,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:29:35,484 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:29:35,484 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 76 [2021-11-12 22:29:35,977 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:29:35,978 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 109 treesize of output 37 [2021-11-12 22:29:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:29:36,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:29:36,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:36,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088328347] [2021-11-12 22:29:36,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088328347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:36,686 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:36,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:29:36,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372828244] [2021-11-12 22:29:36,686 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:36,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:36,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:36,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:36,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:29:36,688 INFO L87 Difference]: Start difference. First operand 1536 states and 2447 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 22:29:38,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:40,728 WARN L515 Checker$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 22:29:43,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:44,649 WARN L515 Checker$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 22:29:49,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:51,926 WARN L515 Checker$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 22:29:57,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:29:59,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:04,071 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:11,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:15,256 INFO L93 Difference]: Finished difference Result 4025 states and 6308 transitions. [2021-11-12 22:30:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:30:15,259 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 182 [2021-11-12 22:30:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:15,269 INFO L225 Difference]: With dead ends: 4025 [2021-11-12 22:30:15,269 INFO L226 Difference]: Without dead ends: 2510 [2021-11-12 22:30:15,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 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 22:30:15,272 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 246 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37442.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.39ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38329.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:15,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 587 Invalid, 598 Unknown, 0 Unchecked, 4.39ms Time], IncrementalHoareTripleChecker [69 Valid, 527 Invalid, 2 Unknown, 0 Unchecked, 38329.47ms Time] [2021-11-12 22:30:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-11-12 22:30:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1536. [2021-11-12 22:30:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 1.570684039087948) internal successors, (2411), 1535 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states 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 22:30:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2411 transitions. [2021-11-12 22:30:15,370 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2411 transitions. Word has length 182 [2021-11-12 22:30:15,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:15,370 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 2411 transitions. [2021-11-12 22:30:15,370 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 22:30:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2411 transitions. [2021-11-12 22:30:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-12 22:30:15,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:15,377 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:15,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:15,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:15,599 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:15,599 INFO L85 PathProgramCache]: Analyzing trace with hash 612161782, now seen corresponding path program 1 times [2021-11-12 22:30:15,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:15,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155292357] [2021-11-12 22:30:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:15,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:15,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:15,601 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:15,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:30:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:16,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:30:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:16,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:16,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:16,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:16,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:16,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:16,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:16,910 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:30:16,911 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 76 [2021-11-12 22:30:17,452 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:30:17,452 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 109 treesize of output 37 [2021-11-12 22:30:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:30:17,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:30:18,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:18,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155292357] [2021-11-12 22:30:18,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155292357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:18,167 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:18,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:30:18,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004844058] [2021-11-12 22:30:18,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:18,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:30:18,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:18,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:30:18,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:30:18,169 INFO L87 Difference]: Start difference. First operand 1536 states and 2411 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 22:30:20,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:22,208 WARN L515 Checker$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 22:30:25,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:34,140 WARN L515 Checker$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 22:30:36,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:40,726 WARN L515 Checker$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 22:30:43,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:52,071 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:53,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:30:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:56,058 INFO L93 Difference]: Finished difference Result 4131 states and 6391 transitions. [2021-11-12 22:30:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:30:56,061 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 182 [2021-11-12 22:30:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:56,071 INFO L225 Difference]: With dead ends: 4131 [2021-11-12 22:30:56,071 INFO L226 Difference]: Without dead ends: 2616 [2021-11-12 22:30:56,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 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 22:30:56,073 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 242 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 63 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36692.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.56ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37629.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:56,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 778 Invalid, 753 Unknown, 0 Unchecked, 4.56ms Time], IncrementalHoareTripleChecker [63 Valid, 686 Invalid, 4 Unknown, 0 Unchecked, 37629.66ms Time] [2021-11-12 22:30:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-11-12 22:30:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1596. [2021-11-12 22:30:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 1.549216300940439) internal successors, (2471), 1595 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states 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 22:30:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2471 transitions. [2021-11-12 22:30:56,187 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2471 transitions. Word has length 182 [2021-11-12 22:30:56,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:56,188 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2471 transitions. [2021-11-12 22:30:56,188 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 22:30:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2471 transitions. [2021-11-12 22:30:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 22:30:56,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:56,192 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:56,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:56,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:30:56,408 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash 610130770, now seen corresponding path program 1 times [2021-11-12 22:30:56,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:56,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339640791] [2021-11-12 22:30:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:56,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:56,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:56,410 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:56,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:30:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:30:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:30:57,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:57,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:57,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:57,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:57,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:30:57,654 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:30:57,655 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 76 [2021-11-12 22:30:58,191 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:30:58,191 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 109 treesize of output 37 [2021-11-12 22:30:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:30:58,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:30:58,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:58,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339640791] [2021-11-12 22:30:58,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339640791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:58,828 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:30:58,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:30:58,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436068250] [2021-11-12 22:30:58,829 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:58,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:30:58,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:30:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:30:58,830 INFO L87 Difference]: Start difference. First operand 1596 states and 2471 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 22:31:00,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:02,880 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:04,538 WARN L515 Checker$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 22:31:05,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:07,893 WARN L515 Checker$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 22:31:09,678 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:11,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:14,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:19,252 WARN L515 Checker$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 22:31:31,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:33,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:36,633 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:38,139 WARN L515 Checker$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 22:31:39,319 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 22:31:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:40,566 INFO L93 Difference]: Finished difference Result 4188 states and 6414 transitions. [2021-11-12 22:31:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:31:40,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 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 183 [2021-11-12 22:31:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:40,579 INFO L225 Difference]: With dead ends: 4188 [2021-11-12 22:31:40,580 INFO L226 Difference]: Without dead ends: 2613 [2021-11-12 22:31:40,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 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 22:31:40,582 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 231 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40581.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.70ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41513.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:40,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1133 Invalid, 743 Unknown, 0 Unchecked, 4.70ms Time], IncrementalHoareTripleChecker [46 Valid, 695 Invalid, 2 Unknown, 0 Unchecked, 41513.67ms Time] [2021-11-12 22:31:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-11-12 22:31:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1601. [2021-11-12 22:31:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 1.52875) internal successors, (2446), 1600 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states 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 22:31:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2446 transitions. [2021-11-12 22:31:40,680 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2446 transitions. Word has length 183 [2021-11-12 22:31:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:40,680 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 2446 transitions. [2021-11-12 22:31:40,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 22:31:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2446 transitions. [2021-11-12 22:31:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 22:31:40,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:40,685 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:31:40,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:40,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:40,900 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash 944860177, now seen corresponding path program 1 times [2021-11-12 22:31:40,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:40,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956488387] [2021-11-12 22:31:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:40,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:40,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:40,902 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:40,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:31:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:31:41,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:41,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:41,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:31:41,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:31:41,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:31:41,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:31:41,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:31:42,180 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:31:42,180 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 76 [2021-11-12 22:31:42,774 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:31:42,774 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 109 treesize of output 37 [2021-11-12 22:31:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:31:43,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:31:43,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:43,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956488387] [2021-11-12 22:31:43,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956488387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:43,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:31:43,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:31:43,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338926226] [2021-11-12 22:31:43,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:43,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:31:43,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:31:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:31:43,463 INFO L87 Difference]: Start difference. First operand 1601 states and 2446 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 22:31:45,487 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 22:31:47,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:31:50,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:18,105 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:23,139 WARN L515 Checker$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 22:32:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:27,048 INFO L93 Difference]: Finished difference Result 4193 states and 6349 transitions. [2021-11-12 22:32:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:32:27,051 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 184 [2021-11-12 22:32:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:27,064 INFO L225 Difference]: With dead ends: 4193 [2021-11-12 22:32:27,064 INFO L226 Difference]: Without dead ends: 2613 [2021-11-12 22:32:27,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 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 22:32:27,066 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 227 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42322.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.11ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43327.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:27,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1126 Invalid, 743 Unknown, 0 Unchecked, 5.11ms Time], IncrementalHoareTripleChecker [46 Valid, 695 Invalid, 2 Unknown, 0 Unchecked, 43327.55ms Time] [2021-11-12 22:32:27,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-11-12 22:32:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1606. [2021-11-12 22:32:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.5084112149532711) internal successors, (2421), 1605 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states 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 22:32:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2421 transitions. [2021-11-12 22:32:27,186 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2421 transitions. Word has length 184 [2021-11-12 22:32:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:27,187 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2421 transitions. [2021-11-12 22:32:27,187 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 22:32:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2421 transitions. [2021-11-12 22:32:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 22:32:27,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:27,192 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:32:27,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:32:27,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:32:27,412 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1165739315, now seen corresponding path program 1 times [2021-11-12 22:32:27,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:27,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041361124] [2021-11-12 22:32:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:27,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:27,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:27,414 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:27,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:32:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:32:28,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:32:28,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:32:28,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:32:28,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:32:28,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:32:28,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:32:28,740 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:32:28,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-12 22:32:29,435 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:32:29,435 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 109 treesize of output 37 [2021-11-12 22:32:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:32:29,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 22:32:30,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:30,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041361124] [2021-11-12 22:32:30,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041361124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:32:30,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:32:30,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:32:30,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73561066] [2021-11-12 22:32:30,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:32:30,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:32:30,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:32:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:32:30,154 INFO L87 Difference]: Start difference. First operand 1606 states and 2421 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 22:32:32,180 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:34,189 WARN L515 Checker$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 22:32:36,678 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:48,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:51,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:53,601 WARN L515 Checker$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 22:32:55,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:32:59,834 WARN L515 Checker$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 22:33:01,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:04,569 INFO L93 Difference]: Finished difference Result 4115 states and 6173 transitions. [2021-11-12 22:33:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:33:04,572 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 185 [2021-11-12 22:33:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:04,578 INFO L225 Difference]: With dead ends: 4115 [2021-11-12 22:33:04,578 INFO L226 Difference]: Without dead ends: 2530 [2021-11-12 22:33:04,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 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 22:33:04,580 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 226 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33375.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.29ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34156.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:04,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 570 Invalid, 578 Unknown, 0 Unchecked, 4.29ms Time], IncrementalHoareTripleChecker [65 Valid, 511 Invalid, 2 Unknown, 0 Unchecked, 34156.21ms Time] [2021-11-12 22:33:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-11-12 22:33:04,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1606. [2021-11-12 22:33:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.485981308411215) internal successors, (2385), 1605 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states 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 22:33:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2385 transitions. [2021-11-12 22:33:04,678 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2385 transitions. Word has length 185 [2021-11-12 22:33:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:04,678 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2385 transitions. [2021-11-12 22:33:04,679 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 22:33:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2385 transitions. [2021-11-12 22:33:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 22:33:04,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:04,683 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:33:04,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:04,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:04,897 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1602969417, now seen corresponding path program 1 times [2021-11-12 22:33:04,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:04,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750088000] [2021-11-12 22:33:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:04,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:04,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:04,900 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:04,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:33:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:05,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:05,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:05,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:05,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:05,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:06,149 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:33:06,149 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 76 [2021-11-12 22:33:06,943 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:33:06,944 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 109 treesize of output 37 [2021-11-12 22:33:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:33:07,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:33:07,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:07,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750088000] [2021-11-12 22:33:07,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750088000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:07,726 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:07,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:33:07,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430605791] [2021-11-12 22:33:07,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:07,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:33:07,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:33:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:33:07,728 INFO L87 Difference]: Start difference. First operand 1606 states and 2385 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:09,769 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 22:33:13,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:18,143 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:21,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:25,579 WARN L515 Checker$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 22:33:32,533 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:33,591 WARN L515 Checker$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 22:33:38,485 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 22:33:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:41,057 INFO L93 Difference]: Finished difference Result 4292 states and 6367 transitions. [2021-11-12 22:33:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:33:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-12 22:33:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:41,063 INFO L225 Difference]: With dead ends: 4292 [2021-11-12 22:33:41,064 INFO L226 Difference]: Without dead ends: 2707 [2021-11-12 22:33:41,065 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 22:33:41,065 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 219 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32254.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.17ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33063.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:41,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 559 Invalid, 574 Unknown, 0 Unchecked, 4.17ms Time], IncrementalHoareTripleChecker [62 Valid, 510 Invalid, 2 Unknown, 0 Unchecked, 33063.48ms Time] [2021-11-12 22:33:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2021-11-12 22:33:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 1702. [2021-11-12 22:33:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 1.4585537918871252) internal successors, (2481), 1701 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2481 transitions. [2021-11-12 22:33:41,197 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2481 transitions. Word has length 192 [2021-11-12 22:33:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:41,197 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 2481 transitions. [2021-11-12 22:33:41,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:33:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2481 transitions. [2021-11-12 22:33:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-12 22:33:41,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:41,207 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:33:41,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:41,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:33:41,420 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:41,420 INFO L85 PathProgramCache]: Analyzing trace with hash 358080211, now seen corresponding path program 1 times [2021-11-12 22:33:41,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:41,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136833812] [2021-11-12 22:33:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:41,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:41,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:41,422 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:41,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:33:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:33:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:42,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:33:42,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:42,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:42,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:42,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:42,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:33:42,642 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:33:42,642 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 76 [2021-11-12 22:33:43,531 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:33:43,531 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 109 treesize of output 37 [2021-11-12 22:33:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:33:43,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:33:44,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:44,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136833812] [2021-11-12 22:33:44,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136833812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:44,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:33:44,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:33:44,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185439383] [2021-11-12 22:33:44,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:44,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:33:44,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:33:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:33:44,463 INFO L87 Difference]: Start difference. First operand 1702 states and 2481 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 22:33:46,500 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 22:33:48,507 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:55,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:33:57,736 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:01,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:12,100 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 22:34:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:15,651 INFO L93 Difference]: Finished difference Result 4420 states and 6437 transitions. [2021-11-12 22:34:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:34:15,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 22:34:15,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:15,657 INFO L225 Difference]: With dead ends: 4420 [2021-11-12 22:34:15,657 INFO L226 Difference]: Without dead ends: 2739 [2021-11-12 22:34:15,658 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 22:34:15,658 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 216 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30203.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.86ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30916.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:15,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 554 Invalid, 566 Unknown, 0 Unchecked, 3.86ms Time], IncrementalHoareTripleChecker [61 Valid, 502 Invalid, 3 Unknown, 0 Unchecked, 30916.83ms Time] [2021-11-12 22:34:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2021-11-12 22:34:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 1804. [2021-11-12 22:34:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 1.43261231281198) internal successors, (2583), 1803 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 22:34:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2583 transitions. [2021-11-12 22:34:15,767 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2583 transitions. Word has length 193 [2021-11-12 22:34:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:15,768 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 2583 transitions. [2021-11-12 22:34:15,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 22:34:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2583 transitions. [2021-11-12 22:34:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 22:34:15,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:15,772 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:15,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:15,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:15,989 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash 23380864, now seen corresponding path program 1 times [2021-11-12 22:34:15,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:15,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608207279] [2021-11-12 22:34:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:15,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:15,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:15,991 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:15,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:34:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:16,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:34:16,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:17,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:17,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:17,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:17,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:17,568 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:34:17,569 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 76 [2021-11-12 22:34:19,115 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:34:19,115 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 109 treesize of output 37 [2021-11-12 22:34:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:34:19,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:34:19,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:19,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608207279] [2021-11-12 22:34:19,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608207279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:19,872 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:19,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:34:19,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265263747] [2021-11-12 22:34:19,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:19,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:34:19,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:34:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:34:19,874 INFO L87 Difference]: Start difference. First operand 1804 states and 2583 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 22:34:21,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:23,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:32,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:34,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:37,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:46,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:47,299 WARN L515 Checker$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 22:34:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:49,999 INFO L93 Difference]: Finished difference Result 4678 states and 6733 transitions. [2021-11-12 22:34:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:34:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 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 195 [2021-11-12 22:34:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:50,006 INFO L225 Difference]: With dead ends: 4678 [2021-11-12 22:34:50,006 INFO L226 Difference]: Without dead ends: 2895 [2021-11-12 22:34:50,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 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 22:34:50,008 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 189 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 57 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29112.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.49ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29846.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:50,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 553 Invalid, 570 Unknown, 0 Unchecked, 3.49ms Time], IncrementalHoareTripleChecker [57 Valid, 510 Invalid, 3 Unknown, 0 Unchecked, 29846.12ms Time] [2021-11-12 22:34:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-11-12 22:34:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2026. [2021-11-12 22:34:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 1.4385185185185185) internal successors, (2913), 2025 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states 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 22:34:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 2913 transitions. [2021-11-12 22:34:50,125 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 2913 transitions. Word has length 195 [2021-11-12 22:34:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:50,126 INFO L470 AbstractCegarLoop]: Abstraction has 2026 states and 2913 transitions. [2021-11-12 22:34:50,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 22:34:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 2913 transitions. [2021-11-12 22:34:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-12 22:34:50,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:50,130 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:50,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:50,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:50,330 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:50,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1795148868, now seen corresponding path program 1 times [2021-11-12 22:34:50,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:50,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662057647] [2021-11-12 22:34:50,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:50,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:50,333 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:50,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:34:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:51,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:34:51,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:51,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:34:51,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:51,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:51,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:51,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:51,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:34:51,549 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:34:51,550 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 76 [2021-11-12 22:34:53,237 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:34:53,238 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 109 treesize of output 37 [2021-11-12 22:34:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:34:53,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 22:34:54,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:54,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662057647] [2021-11-12 22:34:54,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662057647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:54,009 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:54,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:34:54,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220703841] [2021-11-12 22:34:54,010 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:54,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:34:54,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:34:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:34:54,012 INFO L87 Difference]: Start difference. First operand 2026 states and 2913 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 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 22:34:56,042 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:34:58,052 WARN L515 Checker$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 22:35:05,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:10,345 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:11,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:12,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:20,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:27,678 INFO L93 Difference]: Finished difference Result 4878 states and 7018 transitions. [2021-11-12 22:35:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:35:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 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 196 [2021-11-12 22:35:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:27,685 INFO L225 Difference]: With dead ends: 4878 [2021-11-12 22:35:27,685 INFO L226 Difference]: Without dead ends: 2873 [2021-11-12 22:35:27,686 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 22:35:27,687 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 185 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 63 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32486.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33369.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:27,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 722 Invalid, 723 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [63 Valid, 657 Invalid, 3 Unknown, 0 Unchecked, 33369.85ms Time] [2021-11-12 22:35:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-11-12 22:35:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2032. [2021-11-12 22:35:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 1.4342688330871491) internal successors, (2913), 2031 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states 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 22:35:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2913 transitions. [2021-11-12 22:35:27,802 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2913 transitions. Word has length 196 [2021-11-12 22:35:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:27,803 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 2913 transitions. [2021-11-12 22:35:27,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 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 22:35:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2913 transitions. [2021-11-12 22:35:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-12 22:35:27,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:27,805 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:27,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:28,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:28,006 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:28,007 INFO L85 PathProgramCache]: Analyzing trace with hash -885263924, now seen corresponding path program 1 times [2021-11-12 22:35:28,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:28,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663066928] [2021-11-12 22:35:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:28,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:28,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:28,008 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:28,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:35:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:28,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:35:28,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:28,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:35:28,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:35:28,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:35:28,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:35:28,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:35:28,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:35:29,150 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:35:29,150 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 76 [2021-11-12 22:35:31,001 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:35:31,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-12 22:35:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:35:31,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:35:31,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:31,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663066928] [2021-11-12 22:35:31,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663066928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:31,835 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:31,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:35:31,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171265864] [2021-11-12 22:35:31,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:31,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:35:31,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:35:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:35:31,837 INFO L87 Difference]: Start difference. First operand 2032 states and 2913 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 22:35:33,863 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 22:35:42,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:35:46,939 WARN L515 Checker$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 22:36:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:02,656 INFO L93 Difference]: Finished difference Result 4983 states and 7142 transitions. [2021-11-12 22:36:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:36:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 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 200 [2021-11-12 22:36:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:02,664 INFO L225 Difference]: With dead ends: 4983 [2021-11-12 22:36:02,664 INFO L226 Difference]: Without dead ends: 2972 [2021-11-12 22:36:02,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 394 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 22:36:02,667 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 179 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29672.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.08ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30516.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:02,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 694 Invalid, 709 Unknown, 0 Unchecked, 4.08ms Time], IncrementalHoareTripleChecker [61 Valid, 647 Invalid, 1 Unknown, 0 Unchecked, 30516.12ms Time] [2021-11-12 22:36:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-11-12 22:36:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2143. [2021-11-12 22:36:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 1.4341736694677871) internal successors, (3072), 2142 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states 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 22:36:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 3072 transitions. [2021-11-12 22:36:02,852 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 3072 transitions. Word has length 200 [2021-11-12 22:36:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:02,853 INFO L470 AbstractCegarLoop]: Abstraction has 2143 states and 3072 transitions. [2021-11-12 22:36:02,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 22:36:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 3072 transitions. [2021-11-12 22:36:02,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-12 22:36:02,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:02,857 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:02,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 22:36:03,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:03,076 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:03,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1051892435, now seen corresponding path program 1 times [2021-11-12 22:36:03,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:03,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531953923] [2021-11-12 22:36:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:03,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:03,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:03,079 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:03,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:36:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:36:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:03,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:03,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:03,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:03,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:03,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:03,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:04,277 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:36:04,277 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 76 [2021-11-12 22:36:06,072 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:36:06,072 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 109 treesize of output 37 [2021-11-12 22:36:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:06,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-12 22:36:06,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:06,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531953923] [2021-11-12 22:36:06,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531953923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:06,829 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:06,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:36:06,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805710582] [2021-11-12 22:36:06,830 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:06,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:36:06,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:36:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:36:06,832 INFO L87 Difference]: Start difference. First operand 2143 states and 3072 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 22:36:08,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:36:15,183 WARN L515 Checker$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 22:36:17,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:36:22,246 WARN L515 Checker$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 22:36:23,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:36:28,107 WARN L515 Checker$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 22:36:29,998 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 22:36:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:37,773 INFO L93 Difference]: Finished difference Result 5086 states and 7289 transitions. [2021-11-12 22:36:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:36:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 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 201 [2021-11-12 22:36:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:37,781 INFO L225 Difference]: With dead ends: 5086 [2021-11-12 22:36:37,782 INFO L226 Difference]: Without dead ends: 2964 [2021-11-12 22:36:37,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 396 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 22:36:37,784 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 173 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29801.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30616.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:37,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 703 Invalid, 703 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [61 Valid, 641 Invalid, 1 Unknown, 0 Unchecked, 30616.10ms Time] [2021-11-12 22:36:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-11-12 22:36:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2161. [2021-11-12 22:36:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 1.4361111111111111) internal successors, (3102), 2160 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states 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 22:36:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 3102 transitions. [2021-11-12 22:36:37,962 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 3102 transitions. Word has length 201 [2021-11-12 22:36:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:37,963 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 3102 transitions. [2021-11-12 22:36:37,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 22:36:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 3102 transitions. [2021-11-12 22:36:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-12 22:36:37,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:37,967 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:37,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:38,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:38,186 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:38,186 INFO L85 PathProgramCache]: Analyzing trace with hash 899409284, now seen corresponding path program 1 times [2021-11-12 22:36:38,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:38,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300867766] [2021-11-12 22:36:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:38,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:38,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:38,188 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:38,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:36:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:36:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:36:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:39,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:39,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:39,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:36:39,402 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:36:39,403 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 76 [2021-11-12 22:36:40,902 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:36:40,902 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 109 treesize of output 37 [2021-11-12 22:36:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:36:41,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:36:41,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:41,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300867766] [2021-11-12 22:36:41,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300867766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:41,811 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:41,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:36:41,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685276423] [2021-11-12 22:36:41,812 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:36:41,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:36:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:36:41,813 INFO L87 Difference]: Start difference. First operand 2161 states and 3102 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 22:36:43,860 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 22:36:50,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:36:54,723 WARN L515 Checker$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 22:36:56,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:36:57,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:10,902 INFO L93 Difference]: Finished difference Result 5308 states and 7584 transitions. [2021-11-12 22:37:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:37:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 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 209 [2021-11-12 22:37:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:10,912 INFO L225 Difference]: With dead ends: 5308 [2021-11-12 22:37:10,912 INFO L226 Difference]: Without dead ends: 3168 [2021-11-12 22:37:10,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 412 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 22:37:10,915 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 183 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27937.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28758.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:10,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 699 Invalid, 702 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [60 Valid, 641 Invalid, 1 Unknown, 0 Unchecked, 28758.16ms Time] [2021-11-12 22:37:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-11-12 22:37:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2329. [2021-11-12 22:37:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 1.422680412371134) internal successors, (3312), 2328 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states 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 22:37:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 3312 transitions. [2021-11-12 22:37:11,116 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 3312 transitions. Word has length 209 [2021-11-12 22:37:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:11,116 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 3312 transitions. [2021-11-12 22:37:11,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states 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 22:37:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 3312 transitions. [2021-11-12 22:37:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 22:37:11,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:11,121 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:11,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:37:11,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:37:11,341 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1495044440, now seen corresponding path program 1 times [2021-11-12 22:37:11,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:37:11,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589036610] [2021-11-12 22:37:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:11,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:37:11,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:37:11,343 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:37:11,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:37:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:12,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:37:12,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:12,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:12,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:12,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:12,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:12,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:12,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:12,674 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:37:12,674 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 76 [2021-11-12 22:37:14,317 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:37:14,318 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 109 treesize of output 37 [2021-11-12 22:37:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:37:14,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:37:15,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:15,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589036610] [2021-11-12 22:37:15,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589036610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:15,210 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:15,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:37:15,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194506227] [2021-11-12 22:37:15,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:15,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:37:15,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:37:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:37:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:37:15,211 INFO L87 Difference]: Start difference. First operand 2329 states and 3312 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 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 22:37:17,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:19,251 WARN L515 Checker$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 22:37:25,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:28,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:35,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:38,847 WARN L515 Checker$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 22:37:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:37:43,650 INFO L93 Difference]: Finished difference Result 5382 states and 7634 transitions. [2021-11-12 22:37:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:37:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 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 210 [2021-11-12 22:37:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:37:43,664 INFO L225 Difference]: With dead ends: 5382 [2021-11-12 22:37:43,664 INFO L226 Difference]: Without dead ends: 3074 [2021-11-12 22:37:43,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 414 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 22:37:43,667 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 167 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 58 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27306.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28053.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:37:43,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 710 Invalid, 671 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [58 Valid, 610 Invalid, 3 Unknown, 0 Unchecked, 28053.34ms Time] [2021-11-12 22:37:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-11-12 22:37:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2329. [2021-11-12 22:37:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 1.4149484536082475) internal successors, (3294), 2328 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states 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 22:37:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 3294 transitions. [2021-11-12 22:37:43,892 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 3294 transitions. Word has length 210 [2021-11-12 22:37:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:37:43,893 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 3294 transitions. [2021-11-12 22:37:43,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 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 22:37:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 3294 transitions. [2021-11-12 22:37:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 22:37:43,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:37:43,901 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:37:43,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-12 22:37:44,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:37:44,125 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:37:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:37:44,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1940297028, now seen corresponding path program 1 times [2021-11-12 22:37:44,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:37:44,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391488278] [2021-11-12 22:37:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:37:44,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:37:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:37:44,127 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:37:44,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:37:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:37:44,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:37:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:37:45,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:45,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:45,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:37:45,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:45,220 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:37:45,220 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 22:37:45,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:45,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:45,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:37:45,595 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:37:45,595 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 22:37:48,037 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:37:48,038 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 22:37:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:37:48,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:37:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:37:49,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:37:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391488278] [2021-11-12 22:37:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391488278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:37:49,337 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:37:49,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 22:37:49,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146026754] [2021-11-12 22:37:49,338 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:37:49,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:37:49,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:37:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:37:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:37:49,339 INFO L87 Difference]: Start difference. First operand 2329 states and 3294 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 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 22:37:51,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:37:54,972 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:38:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:03,834 INFO L93 Difference]: Finished difference Result 4989 states and 7032 transitions. [2021-11-12 22:38:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:38:03,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 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 222 [2021-11-12 22:38:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:03,838 INFO L225 Difference]: With dead ends: 4989 [2021-11-12 22:38:03,839 INFO L226 Difference]: Without dead ends: 2681 [2021-11-12 22:38:03,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 436 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:38:03,841 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 30 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13804.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14271.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:03,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 644 Invalid, 323 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 1 Unknown, 0 Unchecked, 14271.56ms Time] [2021-11-12 22:38:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-11-12 22:38:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2585. [2021-11-12 22:38:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 1.4109907120743035) internal successors, (3646), 2584 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states 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 22:38:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3646 transitions. [2021-11-12 22:38:04,005 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3646 transitions. Word has length 222 [2021-11-12 22:38:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:04,006 INFO L470 AbstractCegarLoop]: Abstraction has 2585 states and 3646 transitions. [2021-11-12 22:38:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 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 22:38:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3646 transitions. [2021-11-12 22:38:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 22:38:04,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:04,010 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:04,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:04,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:04,211 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:04,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:04,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1457276990, now seen corresponding path program 1 times [2021-11-12 22:38:04,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:04,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145749958] [2021-11-12 22:38:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:04,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:04,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:04,214 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:04,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:38:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:38:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:05,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:05,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:05,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:05,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:05,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:38:05,377 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:38:05,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-12 22:38:05,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:38:05,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:38:05,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:38:05,784 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:38:05,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-12 22:38:07,232 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:38:07,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-12 22:38:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:38:07,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:38:08,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:08,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145749958] [2021-11-12 22:38:08,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145749958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:08,127 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:08,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 22:38:08,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010457107] [2021-11-12 22:38:08,127 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:08,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:38:08,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:38:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:38:08,129 INFO L87 Difference]: Start difference. First operand 2585 states and 3646 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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 22:38:10,165 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:38:12,174 WARN L515 Checker$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 22:38:22,911 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 22:38:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:23,533 INFO L93 Difference]: Finished difference Result 5265 states and 7412 transitions. [2021-11-12 22:38:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:38:23,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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 222 [2021-11-12 22:38:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:23,541 INFO L225 Difference]: With dead ends: 5265 [2021-11-12 22:38:23,541 INFO L226 Difference]: Without dead ends: 2701 [2021-11-12 22:38:23,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 436 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:38:23,544 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 15 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14751.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15157.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:23,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 620 Invalid, 254 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 3 Unknown, 0 Unchecked, 15157.68ms Time] [2021-11-12 22:38:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-12 22:38:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2681. [2021-11-12 22:38:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2680 states have (on average 1.405223880597015) internal successors, (3766), 2680 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states 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 22:38:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3766 transitions. [2021-11-12 22:38:23,764 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3766 transitions. Word has length 222 [2021-11-12 22:38:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:23,765 INFO L470 AbstractCegarLoop]: Abstraction has 2681 states and 3766 transitions. [2021-11-12 22:38:23,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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 22:38:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3766 transitions. [2021-11-12 22:38:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-12 22:38:23,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:23,770 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:38:23,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:23,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:23,991 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1989337734, now seen corresponding path program 1 times [2021-11-12 22:38:23,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:23,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006869553] [2021-11-12 22:38:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:23,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:23,993 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:23,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e5ee459-e6f8-4fd4-92fc-c768b9c4784d/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:38:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:38:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:25,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:25,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:25,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:38:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:38:25,211 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-12 22:38:25,211 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 22:38:25,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:38:25,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:38:25,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:38:25,600 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:38:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-12 22:38:26,473 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:38:26,474 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 22:38:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:38:26,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-12 22:38:27,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:27,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006869553] [2021-11-12 22:38:27,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006869553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:27,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:27,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:38:27,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383126504] [2021-11-12 22:38:27,110 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:27,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:38:27,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:27,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:38:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:38:27,111 INFO L87 Difference]: Start difference. First operand 2681 states and 3766 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:38:29,140 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 22:38:31,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:38:36,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []