./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/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 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:38:26,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:38:26,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:38:26,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:38:26,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:38:26,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:38:26,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:38:26,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:38:26,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:38:26,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:38:26,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:38:26,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:38:26,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:38:26,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:38:26,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:38:26,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:38:26,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:38:26,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:38:26,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:38:26,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:38:26,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:38:26,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:38:26,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:38:26,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:38:26,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:38:26,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:38:26,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:38:26,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:38:26,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:38:26,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:38:26,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:38:26,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:38:26,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:38:26,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:38:26,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:38:26,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:38:26,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:38:26,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:38:26,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:38:26,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:38:26,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:38:26,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:38:26,371 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:38:26,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:38:26,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:38:26,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:38:26,375 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:38:26,375 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:38:26,376 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:38:26,376 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:38:26,376 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:38:26,376 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:38:26,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:38:26,386 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:38:26,386 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:38:26,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:38:26,387 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:38:26,387 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:38:26,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:38:26,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:38:26,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:38:26,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:38:26,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:38:26,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:38:26,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:38:26,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:38:26,390 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:38:26,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:38:26,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:38:26,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:38:26,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:38:26,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:38:26,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:38:26,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:26,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:38:26,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:38:26,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:38:26,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:38:26,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:38:26,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:38:26,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:38:26,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:38:26,395 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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd [2021-11-12 22:38:26,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:38:26,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:38:26,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:38:26,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:38:26,727 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:38:26,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-12 22:38:26,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data/a34863d6c/41ab907ce70c44bcb2ac8c137fe491c8/FLAG17a390d89 [2021-11-12 22:38:27,484 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:38:27,485 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-12 22:38:27,521 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data/a34863d6c/41ab907ce70c44bcb2ac8c137fe491c8/FLAG17a390d89 [2021-11-12 22:38:27,688 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data/a34863d6c/41ab907ce70c44bcb2ac8c137fe491c8 [2021-11-12 22:38:27,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:38:27,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:38:27,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:27,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:38:27,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:38:27,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:27" (1/1) ... [2021-11-12 22:38:27,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d28fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:27, skipping insertion in model container [2021-11-12 22:38:27,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:27" (1/1) ... [2021-11-12 22:38:27,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:38:27,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:28,564 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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-12 22:38:28,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:28,585 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 22:38:28,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10b51989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:28, skipping insertion in model container [2021-11-12 22:38:28,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:28,587 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:38:28,590 INFO L158 Benchmark]: Toolchain (without parser) took 895.46ms. Allocated memory is still 107.0MB. Free memory was 72.3MB in the beginning and 67.1MB in the end (delta: 5.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:38:28,592 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 107.0MB. Free memory was 62.4MB in the beginning and 62.4MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:38:28,594 INFO L158 Benchmark]: CACSL2BoogieTranslator took 892.33ms. Allocated memory is still 107.0MB. Free memory was 72.1MB in the beginning and 67.1MB in the end (delta: 5.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:38:28,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 107.0MB. Free memory was 62.4MB in the beginning and 62.4MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 892.33ms. Allocated memory is still 107.0MB. Free memory was 72.1MB in the beginning and 67.1MB in the end (delta: 5.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3106]: 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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/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 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:38:31,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:38:31,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:38:31,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:38:31,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:38:31,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:38:31,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:38:31,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:38:31,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:38:31,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:38:31,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:38:31,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:38:31,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:38:31,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:38:31,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:38:31,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:38:31,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:38:31,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:38:31,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:38:31,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:38:31,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:38:31,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:38:31,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:38:31,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:38:31,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:38:31,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:38:31,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:38:31,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:38:31,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:38:31,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:38:31,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:38:31,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:38:31,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:38:31,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:38:31,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:38:31,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:38:31,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:38:31,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:38:31,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:38:31,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:38:31,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:38:31,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:38:31,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:38:31,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:38:31,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:38:31,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:38:31,577 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:38:31,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:38:31,578 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:38:31,578 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:38:31,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:38:31,578 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:38:31,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:38:31,582 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:38:31,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:38:31,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:38:31,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:38:31,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:38:31,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:38:31,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:38:31,583 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:38:31,584 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:38:31,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:38:31,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:38:31,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:38:31,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:38:31,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:38:31,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:38:31,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:38:31,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:31,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:38:31,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:38:31,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:38:31,587 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:38:31,587 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:38:31,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:38:31,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:38:31,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:38:31,589 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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd [2021-11-12 22:38:32,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:38:32,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:38:32,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:38:32,143 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:38:32,144 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:38:32,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-12 22:38:32,233 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data/4c104695b/6decf6c010844ae58cb5759e6980cdb6/FLAGa40be2d4e [2021-11-12 22:38:33,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:38:33,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-12 22:38:33,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data/4c104695b/6decf6c010844ae58cb5759e6980cdb6/FLAGa40be2d4e [2021-11-12 22:38:33,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/data/4c104695b/6decf6c010844ae58cb5759e6980cdb6 [2021-11-12 22:38:33,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:38:33,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:38:33,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:33,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:38:33,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:38:33,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:33" (1/1) ... [2021-11-12 22:38:33,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ccd5177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:33, skipping insertion in model container [2021-11-12 22:38:33,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:33" (1/1) ... [2021-11-12 22:38:33,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:38:33,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:34,260 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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-12 22:38:34,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:34,285 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:38:34,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:34,506 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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-12 22:38:34,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:34,518 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:38:34,678 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_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-12 22:38:34,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:34,723 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:38:34,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34 WrapperNode [2021-11-12 22:38:34,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:34,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:38:34,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:38:34,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:38:34,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:34,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:34,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:38:34,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:38:34,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:38:34,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:38:34,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:34,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:34,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:34,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:34,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:35,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:35,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:35,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:38:35,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:38:35,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:38:35,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:38:35,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (1/1) ... [2021-11-12 22:38:35,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:35,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:38:35,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:38:35,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:38:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 22:38:35,185 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 22:38:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:38:35,185 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:38:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:38:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:38:35,186 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:38:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:38:35,186 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:38:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:38:35,187 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:38:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 22:38:35,187 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 22:38:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:38:35,188 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:38:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:38:35,188 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:38:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:38:35,189 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:38:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:38:35,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:38:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:38:35,189 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:38:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:38:35,190 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:38:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:38:35,190 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:38:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:38:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:38:35,191 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:38:35,191 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 22:38:35,192 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 22:38:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:38:35,192 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:38:35,192 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:38:35,192 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:38:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:38:35,193 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:38:35,193 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 22:38:35,194 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 22:38:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:38:35,194 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:38:35,194 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:38:35,194 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:38:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:38:35,195 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:38:35,195 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:38:35,196 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:38:35,196 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:38:35,197 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:38:35,198 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:38:35,199 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:38:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:38:35,199 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:38:35,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:38:35,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:38:35,200 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:38:35,200 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:38:39,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:38:39,664 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:38:39,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:38:39 BoogieIcfgContainer [2021-11-12 22:38:39,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:38:39,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:38:39,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:38:39,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:38:39,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:38:33" (1/3) ... [2021-11-12 22:38:39,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3191d887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:38:39, skipping insertion in model container [2021-11-12 22:38:39,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:34" (2/3) ... [2021-11-12 22:38:39,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3191d887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:38:39, skipping insertion in model container [2021-11-12 22:38:39,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:38:39" (3/3) ... [2021-11-12 22:38:39,690 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product27.cil.c [2021-11-12 22:38:39,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:38:39,696 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:38:39,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:38:39,777 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 22:38:39,780 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:38:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 598 states, 461 states have (on average 1.6702819956616053) internal successors, (770), 479 states have internal predecessors, (770), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 22:38:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:38:39,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:39,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:39,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash -363175274, now seen corresponding path program 1 times [2021-11-12 22:38:39,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:39,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497123681] [2021-11-12 22:38:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:39,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:39,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:39,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:39,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:38:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:38:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:41,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:41,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:41,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497123681] [2021-11-12 22:38:41,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497123681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:41,580 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:41,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:38:41,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582564656] [2021-11-12 22:38:41,583 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:41,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:38:41,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:38:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:38:41,623 INFO L87 Difference]: Start difference. First operand has 598 states, 461 states have (on average 1.6702819956616053) internal successors, (770), 479 states have internal predecessors, (770), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:42,046 INFO L93 Difference]: Finished difference Result 1199 states and 1993 transitions. [2021-11-12 22:38:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:38:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 113 [2021-11-12 22:38:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:42,082 INFO L225 Difference]: With dead ends: 1199 [2021-11-12 22:38:42,082 INFO L226 Difference]: Without dead ends: 609 [2021-11-12 22:38:42,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:38:42,103 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 118 mSDsluCounter, 6607 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 7575 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.88ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:42,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 7575 Invalid, 111 Unknown, 0 Unchecked, 32.88ms Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 218.06ms Time] [2021-11-12 22:38:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-12 22:38:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 601. [2021-11-12 22:38:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 464 states have (on average 1.6616379310344827) internal successors, (771), 482 states have internal predecessors, (771), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 104 states have call predecessors, (108), 106 states have call successors, (108) [2021-11-12 22:38:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 988 transitions. [2021-11-12 22:38:42,278 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 988 transitions. Word has length 113 [2021-11-12 22:38:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:42,279 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 988 transitions. [2021-11-12 22:38:42,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 988 transitions. [2021-11-12 22:38:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:38:42,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:42,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:42,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 22:38:42,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:42,508 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:42,510 INFO L85 PathProgramCache]: Analyzing trace with hash 356217210, now seen corresponding path program 1 times [2021-11-12 22:38:42,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:42,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328056365] [2021-11-12 22:38:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:42,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:42,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:42,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:42,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:38:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:43,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:38:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:43,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:43,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:43,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328056365] [2021-11-12 22:38:43,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328056365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:43,877 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:43,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:38:43,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345010697] [2021-11-12 22:38:43,877 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:43,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:38:43,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:38:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:38:43,881 INFO L87 Difference]: Start difference. First operand 601 states and 988 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:44,150 INFO L93 Difference]: Finished difference Result 1207 states and 1994 transitions. [2021-11-12 22:38:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:38:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 114 [2021-11-12 22:38:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:44,157 INFO L225 Difference]: With dead ends: 1207 [2021-11-12 22:38:44,158 INFO L226 Difference]: Without dead ends: 622 [2021-11-12 22:38:44,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:38:44,164 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 186 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 5780 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.16ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:44,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 5780 Invalid, 106 Unknown, 0 Unchecked, 14.16ms Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 150.76ms Time] [2021-11-12 22:38:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-12 22:38:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 614. [2021-11-12 22:38:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 474 states have (on average 1.6582278481012658) internal successors, (786), 494 states have internal predecessors, (786), 110 states have call successors, (110), 27 states have call predecessors, (110), 29 states have return successors, (111), 105 states have call predecessors, (111), 107 states have call successors, (111) [2021-11-12 22:38:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1007 transitions. [2021-11-12 22:38:44,210 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1007 transitions. Word has length 114 [2021-11-12 22:38:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:44,210 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1007 transitions. [2021-11-12 22:38:44,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1007 transitions. [2021-11-12 22:38:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 22:38:44,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:44,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:44,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:38:44,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:44,435 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:44,436 INFO L85 PathProgramCache]: Analyzing trace with hash -780489670, now seen corresponding path program 1 times [2021-11-12 22:38:44,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:44,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283935757] [2021-11-12 22:38:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:44,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:44,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:44,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:44,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:38:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:44,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:38:44,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:45,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:45,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:45,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283935757] [2021-11-12 22:38:45,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283935757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:45,745 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:45,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:38:45,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643203180] [2021-11-12 22:38:45,747 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:45,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:38:45,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:45,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:38:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:38:45,750 INFO L87 Difference]: Start difference. First operand 614 states and 1007 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:46,071 INFO L93 Difference]: Finished difference Result 1233 states and 2033 transitions. [2021-11-12 22:38:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:38:46,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 115 [2021-11-12 22:38:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:46,081 INFO L225 Difference]: With dead ends: 1233 [2021-11-12 22:38:46,081 INFO L226 Difference]: Without dead ends: 635 [2021-11-12 22:38:46,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:38:46,092 INFO L933 BasicCegarLoop]: 969 mSDtfsCounter, 103 mSDsluCounter, 7545 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 8514 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.14ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 212.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:46,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 8514 Invalid, 133 Unknown, 0 Unchecked, 30.14ms Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 212.59ms Time] [2021-11-12 22:38:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-12 22:38:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 627. [2021-11-12 22:38:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 484 states have (on average 1.6549586776859504) internal successors, (801), 506 states have internal predecessors, (801), 111 states have call successors, (111), 27 states have call predecessors, (111), 31 states have return successors, (114), 106 states have call predecessors, (114), 108 states have call successors, (114) [2021-11-12 22:38:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1026 transitions. [2021-11-12 22:38:46,163 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1026 transitions. Word has length 115 [2021-11-12 22:38:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:46,164 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1026 transitions. [2021-11-12 22:38:46,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1026 transitions. [2021-11-12 22:38:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:38:46,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:46,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:46,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:46,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:46,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1420925983, now seen corresponding path program 1 times [2021-11-12 22:38:46,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:46,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358077167] [2021-11-12 22:38:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:46,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:46,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:46,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:46,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:38:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:46,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:38:46,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:47,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:47,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:47,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358077167] [2021-11-12 22:38:47,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358077167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:47,689 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:47,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:38:47,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997242019] [2021-11-12 22:38:47,690 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:47,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:38:47,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:47,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:38:47,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:38:47,691 INFO L87 Difference]: Start difference. First operand 627 states and 1026 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:38:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:47,919 INFO L93 Difference]: Finished difference Result 1253 states and 2063 transitions. [2021-11-12 22:38:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:38:47,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 116 [2021-11-12 22:38:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:47,926 INFO L225 Difference]: With dead ends: 1253 [2021-11-12 22:38:47,927 INFO L226 Difference]: Without dead ends: 642 [2021-11-12 22:38:47,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:38:47,933 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 150 mSDsluCounter, 4653 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 5610 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.29ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:47,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 5610 Invalid, 81 Unknown, 0 Unchecked, 12.29ms Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 128.95ms Time] [2021-11-12 22:38:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-12 22:38:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 640. [2021-11-12 22:38:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 494 states have (on average 1.6518218623481782) internal successors, (816), 518 states have internal predecessors, (816), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 107 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-12 22:38:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1048 transitions. [2021-11-12 22:38:47,974 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1048 transitions. Word has length 116 [2021-11-12 22:38:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:47,975 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1048 transitions. [2021-11-12 22:38:47,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:38:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1048 transitions. [2021-11-12 22:38:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:38:47,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:47,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:48,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:48,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:48,199 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash 826959326, now seen corresponding path program 1 times [2021-11-12 22:38:48,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:48,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955546282] [2021-11-12 22:38:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:48,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:48,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:48,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:38:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:38:48,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:49,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:49,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:49,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955546282] [2021-11-12 22:38:49,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955546282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:49,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:49,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:38:49,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314732362] [2021-11-12 22:38:49,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:49,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:38:49,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:38:49,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:38:49,504 INFO L87 Difference]: Start difference. First operand 640 states and 1048 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:49,913 INFO L93 Difference]: Finished difference Result 1276 states and 2099 transitions. [2021-11-12 22:38:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:38:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-12 22:38:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:49,921 INFO L225 Difference]: With dead ends: 1276 [2021-11-12 22:38:49,922 INFO L226 Difference]: Without dead ends: 646 [2021-11-12 22:38:49,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:38:49,929 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 123 mSDsluCounter, 7423 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 237.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 8370 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.55ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 282.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:49,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 8370 Invalid, 189 Unknown, 0 Unchecked, 16.55ms Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 282.51ms Time] [2021-11-12 22:38:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-12 22:38:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 636. [2021-11-12 22:38:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 490 states have (on average 1.6428571428571428) internal successors, (805), 514 states have internal predecessors, (805), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 107 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-12 22:38:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1037 transitions. [2021-11-12 22:38:49,971 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1037 transitions. Word has length 117 [2021-11-12 22:38:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:49,971 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1037 transitions. [2021-11-12 22:38:49,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1037 transitions. [2021-11-12 22:38:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:38:49,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:49,977 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:50,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:50,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:50,201 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1827055730, now seen corresponding path program 1 times [2021-11-12 22:38:50,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:50,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933042402] [2021-11-12 22:38:50,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:50,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:50,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:50,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:50,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:38:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:50,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:38:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:51,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:51,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:51,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933042402] [2021-11-12 22:38:51,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933042402] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:51,472 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:51,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:38:51,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925043044] [2021-11-12 22:38:51,472 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:51,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:38:51,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:38:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:38:51,474 INFO L87 Difference]: Start difference. First operand 636 states and 1037 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:38:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:51,558 INFO L93 Difference]: Finished difference Result 1248 states and 2040 transitions. [2021-11-12 22:38:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:38:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2021-11-12 22:38:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:51,568 INFO L225 Difference]: With dead ends: 1248 [2021-11-12 22:38:51,568 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:38:51,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:38:51,580 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 19 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3817 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.16ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:51,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3817 Invalid, 21 Unknown, 0 Unchecked, 7.48ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 29.16ms Time] [2021-11-12 22:38:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:38:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:38:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 425 states have (on average 1.6258823529411766) internal successors, (691), 441 states have internal predecessors, (691), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:38:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 904 transitions. [2021-11-12 22:38:51,613 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 904 transitions. Word has length 117 [2021-11-12 22:38:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:51,614 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 904 transitions. [2021-11-12 22:38:51,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:38:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 904 transitions. [2021-11-12 22:38:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:38:51,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:51,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:51,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:51,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:51,834 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1513054078, now seen corresponding path program 1 times [2021-11-12 22:38:51,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:51,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554410629] [2021-11-12 22:38:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:51,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:51,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:51,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:38:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:52,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:38:52,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:52,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:53,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:53,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554410629] [2021-11-12 22:38:53,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554410629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:53,284 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:53,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:38:53,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793941848] [2021-11-12 22:38:53,285 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:53,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:38:53,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:38:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:38:53,286 INFO L87 Difference]: Start difference. First operand 559 states and 904 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:53,493 INFO L93 Difference]: Finished difference Result 1105 states and 1796 transitions. [2021-11-12 22:38:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:38:53,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 118 [2021-11-12 22:38:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:53,500 INFO L225 Difference]: With dead ends: 1105 [2021-11-12 22:38:53,501 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:38:53,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:38:53,506 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 76 mSDsluCounter, 5297 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6184 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:53,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 6184 Invalid, 106 Unknown, 0 Unchecked, 10.76ms Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 124.50ms Time] [2021-11-12 22:38:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:38:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:38:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 425 states have (on average 1.6235294117647059) internal successors, (690), 441 states have internal predecessors, (690), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:38:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 903 transitions. [2021-11-12 22:38:53,537 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 903 transitions. Word has length 118 [2021-11-12 22:38:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:53,537 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 903 transitions. [2021-11-12 22:38:53,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 903 transitions. [2021-11-12 22:38:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:38:53,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:53,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:53,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:53,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:53,764 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash -444088989, now seen corresponding path program 1 times [2021-11-12 22:38:53,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:53,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100810337] [2021-11-12 22:38:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:53,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:53,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:53,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:53,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:38:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:54,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:38:54,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:54,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:55,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:55,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100810337] [2021-11-12 22:38:55,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100810337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:55,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:55,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:38:55,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158425359] [2021-11-12 22:38:55,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:55,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:38:55,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:55,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:38:55,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:38:55,051 INFO L87 Difference]: Start difference. First operand 559 states and 903 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:55,363 INFO L93 Difference]: Finished difference Result 1105 states and 1794 transitions. [2021-11-12 22:38:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:38:55,365 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 119 [2021-11-12 22:38:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:55,372 INFO L225 Difference]: With dead ends: 1105 [2021-11-12 22:38:55,373 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:38:55,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:38:55,378 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 35 mSDsluCounter, 9705 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 10592 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:55,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 10592 Invalid, 151 Unknown, 0 Unchecked, 23.24ms Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 183.72ms Time] [2021-11-12 22:38:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:38:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:38:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 425 states have (on average 1.6211764705882352) internal successors, (689), 441 states have internal predecessors, (689), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:38:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 902 transitions. [2021-11-12 22:38:55,406 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 902 transitions. Word has length 119 [2021-11-12 22:38:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:55,407 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 902 transitions. [2021-11-12 22:38:55,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 902 transitions. [2021-11-12 22:38:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:38:55,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:55,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:55,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:55,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:55,629 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1557741475, now seen corresponding path program 1 times [2021-11-12 22:38:55,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:55,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016977278] [2021-11-12 22:38:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:55,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:55,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:55,634 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:55,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:38:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:38:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:56,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:38:57,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:57,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016977278] [2021-11-12 22:38:57,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016977278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:38:57,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:38:57,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:38:57,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787720855] [2021-11-12 22:38:57,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:57,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:38:57,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:38:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:38:57,155 INFO L87 Difference]: Start difference. First operand 559 states and 902 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:38:57,350 INFO L93 Difference]: Finished difference Result 1105 states and 1792 transitions. [2021-11-12 22:38:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:38:57,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 120 [2021-11-12 22:38:57,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:38:57,358 INFO L225 Difference]: With dead ends: 1105 [2021-11-12 22:38:57,358 INFO L226 Difference]: Without dead ends: 559 [2021-11-12 22:38:57,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:38:57,364 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 41 mSDsluCounter, 6169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 7056 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.32ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:38:57,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 7056 Invalid, 97 Unknown, 0 Unchecked, 11.32ms Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 108.23ms Time] [2021-11-12 22:38:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-12 22:38:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-12 22:38:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 425 states have (on average 1.6188235294117648) internal successors, (688), 441 states have internal predecessors, (688), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:38:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 901 transitions. [2021-11-12 22:38:57,395 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 901 transitions. Word has length 120 [2021-11-12 22:38:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:38:57,396 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 901 transitions. [2021-11-12 22:38:57,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:38:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 901 transitions. [2021-11-12 22:38:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:38:57,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:38:57,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:57,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:38:57,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:38:57,623 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:38:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:38:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1733699816, now seen corresponding path program 1 times [2021-11-12 22:38:57,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:38:57,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704427586] [2021-11-12 22:38:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:38:57,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:38:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:38:57,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:38:57,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:38:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:38:58,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:38:58,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:38:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:38:58,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:38:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:38:58,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:38:58,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704427586] [2021-11-12 22:38:58,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704427586] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:38:58,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:38:58,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:38:58,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459181599] [2021-11-12 22:38:58,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:38:58,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:38:58,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:38:58,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:38:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:38:58,823 INFO L87 Difference]: Start difference. First operand 559 states and 901 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:39:00,842 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 22:39:02,849 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 22:39:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:04,160 INFO L93 Difference]: Finished difference Result 1599 states and 2600 transitions. [2021-11-12 22:39:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:39:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 121 [2021-11-12 22:39:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:04,169 INFO L225 Difference]: With dead ends: 1599 [2021-11-12 22:39:04,169 INFO L226 Difference]: Without dead ends: 1058 [2021-11-12 22:39:04,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:39:04,177 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 774 mSDsluCounter, 3548 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 161 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5028.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 4508 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.93ms SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5193.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:04,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 4508 Invalid, 746 Unknown, 0 Unchecked, 28.93ms Time], IncrementalHoareTripleChecker [161 Valid, 583 Invalid, 2 Unknown, 0 Unchecked, 5193.15ms Time] [2021-11-12 22:39:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-11-12 22:39:04,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1049. [2021-11-12 22:39:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 800 states have (on average 1.5825) internal successors, (1266), 830 states have internal predecessors, (1266), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (201), 192 states have call predecessors, (201), 196 states have call successors, (201) [2021-11-12 22:39:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1667 transitions. [2021-11-12 22:39:04,236 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1667 transitions. Word has length 121 [2021-11-12 22:39:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:04,237 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1667 transitions. [2021-11-12 22:39:04,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:39:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1667 transitions. [2021-11-12 22:39:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:39:04,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:04,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:04,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:04,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:04,456 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1932394138, now seen corresponding path program 1 times [2021-11-12 22:39:04,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:04,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214197112] [2021-11-12 22:39:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:04,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:04,458 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:04,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:39:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:04,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:39:05,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:39:05,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:05,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214197112] [2021-11-12 22:39:05,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214197112] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:39:05,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:39:05,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:39:05,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038835162] [2021-11-12 22:39:05,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:05,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:39:05,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:05,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:39:05,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:39:05,713 INFO L87 Difference]: Start difference. First operand 1049 states and 1667 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:39:07,744 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 22:39:08,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:08,851 INFO L93 Difference]: Finished difference Result 2634 states and 4251 transitions. [2021-11-12 22:39:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:39:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 123 [2021-11-12 22:39:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:08,869 INFO L225 Difference]: With dead ends: 2634 [2021-11-12 22:39:08,869 INFO L226 Difference]: Without dead ends: 1603 [2021-11-12 22:39:08,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:39:08,903 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 883 mSDsluCounter, 3727 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 134 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2859.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 4836 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.14ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2992.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:08,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 4836 Invalid, 487 Unknown, 0 Unchecked, 14.14ms Time], IncrementalHoareTripleChecker [134 Valid, 352 Invalid, 1 Unknown, 0 Unchecked, 2992.61ms Time] [2021-11-12 22:39:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-11-12 22:39:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1594. [2021-11-12 22:39:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1216 states have (on average 1.596217105263158) internal successors, (1941), 1261 states have internal predecessors, (1941), 302 states have call successors, (302), 75 states have call predecessors, (302), 75 states have return successors, (324), 295 states have call predecessors, (324), 297 states have call successors, (324) [2021-11-12 22:39:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2567 transitions. [2021-11-12 22:39:08,990 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2567 transitions. Word has length 123 [2021-11-12 22:39:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:08,991 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2567 transitions. [2021-11-12 22:39:08,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:39:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2567 transitions. [2021-11-12 22:39:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:39:08,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:08,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:09,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:09,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:09,210 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:09,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash -951451077, now seen corresponding path program 1 times [2021-11-12 22:39:09,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:09,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683134754] [2021-11-12 22:39:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:09,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:09,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:09,212 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:09,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:39:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:09,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:39:10,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:39:10,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:10,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683134754] [2021-11-12 22:39:10,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683134754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:10,464 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:10,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:39:10,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086348031] [2021-11-12 22:39:10,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:10,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:39:10,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:39:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:39:10,466 INFO L87 Difference]: Start difference. First operand 1594 states and 2567 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 22:39:12,495 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 22:39:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:15,137 INFO L93 Difference]: Finished difference Result 5661 states and 9575 transitions. [2021-11-12 22:39:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:39:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 126 [2021-11-12 22:39:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:15,183 INFO L225 Difference]: With dead ends: 5661 [2021-11-12 22:39:15,183 INFO L226 Difference]: Without dead ends: 4085 [2021-11-12 22:39:15,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:39:15,201 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 1192 mSDsluCounter, 5356 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 97 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4050.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 6719 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.96ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4346.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:15,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1279 Valid, 6719 Invalid, 1063 Unknown, 0 Unchecked, 49.96ms Time], IncrementalHoareTripleChecker [97 Valid, 965 Invalid, 1 Unknown, 0 Unchecked, 4346.34ms Time] [2021-11-12 22:39:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-11-12 22:39:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3134. [2021-11-12 22:39:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 2395 states have (on average 1.5920668058455114) internal successors, (3813), 2486 states have internal predecessors, (3813), 584 states have call successors, (584), 147 states have call predecessors, (584), 154 states have return successors, (745), 576 states have call predecessors, (745), 576 states have call successors, (745) [2021-11-12 22:39:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 5142 transitions. [2021-11-12 22:39:15,469 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 5142 transitions. Word has length 126 [2021-11-12 22:39:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:15,470 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 5142 transitions. [2021-11-12 22:39:15,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 22:39:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 5142 transitions. [2021-11-12 22:39:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:39:15,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:15,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:15,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:15,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:15,696 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:15,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2084536366, now seen corresponding path program 1 times [2021-11-12 22:39:15,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:15,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679362576] [2021-11-12 22:39:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:15,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:15,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:15,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:15,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:39:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:16,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:39:16,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:39:16,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:39:16,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:16,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679362576] [2021-11-12 22:39:16,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679362576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:16,651 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:16,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:39:16,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447017466] [2021-11-12 22:39:16,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:16,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:39:16,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:16,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:39:16,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:39:16,653 INFO L87 Difference]: Start difference. First operand 3134 states and 5142 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:39:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:16,973 INFO L93 Difference]: Finished difference Result 6268 states and 10412 transitions. [2021-11-12 22:39:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:39:16,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2021-11-12 22:39:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:17,007 INFO L225 Difference]: With dead ends: 6268 [2021-11-12 22:39:17,008 INFO L226 Difference]: Without dead ends: 3152 [2021-11-12 22:39:17,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:39:17,049 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 19 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.07ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:17,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2616 Invalid, 82 Unknown, 0 Unchecked, 5.07ms Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 96.09ms Time] [2021-11-12 22:39:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-11-12 22:39:17,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3146. [2021-11-12 22:39:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3146 states, 2404 states have (on average 1.588602329450915) internal successors, (3819), 2495 states have internal predecessors, (3819), 584 states have call successors, (584), 153 states have call predecessors, (584), 157 states have return successors, (729), 573 states have call predecessors, (729), 576 states have call successors, (729) [2021-11-12 22:39:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 5132 transitions. [2021-11-12 22:39:17,309 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 5132 transitions. Word has length 127 [2021-11-12 22:39:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:17,309 INFO L470 AbstractCegarLoop]: Abstraction has 3146 states and 5132 transitions. [2021-11-12 22:39:17,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:39:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 5132 transitions. [2021-11-12 22:39:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 22:39:17,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:17,314 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:17,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:17,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:17,534 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1512441396, now seen corresponding path program 1 times [2021-11-12 22:39:17,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:17,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252985576] [2021-11-12 22:39:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:17,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:17,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:17,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:17,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:39:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:39:18,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:39:18,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:18,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252985576] [2021-11-12 22:39:18,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252985576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:18,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:18,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:39:18,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845334791] [2021-11-12 22:39:18,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:18,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:39:18,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:39:18,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:39:18,837 INFO L87 Difference]: Start difference. First operand 3146 states and 5132 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:39:20,859 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 22:39:22,865 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 22:39:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:25,542 INFO L93 Difference]: Finished difference Result 11246 states and 19519 transitions. [2021-11-12 22:39:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:39:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 135 [2021-11-12 22:39:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:25,676 INFO L225 Difference]: With dead ends: 11246 [2021-11-12 22:39:25,676 INFO L226 Difference]: Without dead ends: 8118 [2021-11-12 22:39:25,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:39:25,704 INFO L933 BasicCegarLoop]: 1348 mSDtfsCounter, 1166 mSDsluCounter, 5327 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 93 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5917.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 6675 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.27ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6190.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:25,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 6675 Invalid, 1053 Unknown, 0 Unchecked, 37.27ms Time], IncrementalHoareTripleChecker [93 Valid, 958 Invalid, 2 Unknown, 0 Unchecked, 6190.75ms Time] [2021-11-12 22:39:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8118 states. [2021-11-12 22:39:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8118 to 6268. [2021-11-12 22:39:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6268 states, 4792 states have (on average 1.5840984974958263) internal successors, (7591), 4978 states have internal predecessors, (7591), 1151 states have call successors, (1151), 303 states have call predecessors, (1151), 324 states have return successors, (1708), 1138 states have call predecessors, (1708), 1137 states have call successors, (1708) [2021-11-12 22:39:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6268 states to 6268 states and 10450 transitions. [2021-11-12 22:39:26,254 INFO L78 Accepts]: Start accepts. Automaton has 6268 states and 10450 transitions. Word has length 135 [2021-11-12 22:39:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:26,255 INFO L470 AbstractCegarLoop]: Abstraction has 6268 states and 10450 transitions. [2021-11-12 22:39:26,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:39:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6268 states and 10450 transitions. [2021-11-12 22:39:26,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:39:26,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:26,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:26,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:26,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:26,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1095371607, now seen corresponding path program 1 times [2021-11-12 22:39:26,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:26,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752852849] [2021-11-12 22:39:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:26,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:26,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:26,482 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:26,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:39:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:39:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:39:27,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:39:27,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:27,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752852849] [2021-11-12 22:39:27,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752852849] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:27,645 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:27,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:39:27,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800930757] [2021-11-12 22:39:27,646 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:27,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:39:27,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:39:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:39:27,648 INFO L87 Difference]: Start difference. First operand 6268 states and 10450 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:39:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:28,140 INFO L93 Difference]: Finished difference Result 12590 states and 21327 transitions. [2021-11-12 22:39:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:39:28,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 136 [2021-11-12 22:39:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:28,231 INFO L225 Difference]: With dead ends: 12590 [2021-11-12 22:39:28,232 INFO L226 Difference]: Without dead ends: 6340 [2021-11-12 22:39:28,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:39:28,274 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 21 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3481 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.36ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:28,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3481 Invalid, 86 Unknown, 0 Unchecked, 5.36ms Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 93.14ms Time] [2021-11-12 22:39:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2021-11-12 22:39:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6328. [2021-11-12 22:39:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 4846 states have (on average 1.5788278992983904) internal successors, (7651), 5020 states have internal predecessors, (7651), 1151 states have call successors, (1151), 327 states have call predecessors, (1151), 330 states have return successors, (1684), 1132 states have call predecessors, (1684), 1137 states have call successors, (1684) [2021-11-12 22:39:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 10486 transitions. [2021-11-12 22:39:28,979 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 10486 transitions. Word has length 136 [2021-11-12 22:39:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:28,981 INFO L470 AbstractCegarLoop]: Abstraction has 6328 states and 10486 transitions. [2021-11-12 22:39:28,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:39:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 10486 transitions. [2021-11-12 22:39:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:39:28,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:28,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:29,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:29,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:29,202 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:29,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1315301520, now seen corresponding path program 1 times [2021-11-12 22:39:29,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:29,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287679060] [2021-11-12 22:39:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:29,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:29,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:29,206 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:29,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:39:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:29,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:39:30,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:39:30,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:30,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287679060] [2021-11-12 22:39:30,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287679060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:30,479 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:30,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:39:30,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485656722] [2021-11-12 22:39:30,479 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:30,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:39:30,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:39:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:39:30,482 INFO L87 Difference]: Start difference. First operand 6328 states and 10486 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 22:39:32,513 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 22:39:34,520 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 22:39:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:37,602 INFO L93 Difference]: Finished difference Result 22606 states and 40746 transitions. [2021-11-12 22:39:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:39:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 145 [2021-11-12 22:39:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:37,737 INFO L225 Difference]: With dead ends: 22606 [2021-11-12 22:39:37,737 INFO L226 Difference]: Without dead ends: 16296 [2021-11-12 22:39:37,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:39:37,790 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1143 mSDsluCounter, 5520 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 89 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5809.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 6862 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.90ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6109.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:37,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 6862 Invalid, 1081 Unknown, 0 Unchecked, 19.90ms Time], IncrementalHoareTripleChecker [89 Valid, 990 Invalid, 2 Unknown, 0 Unchecked, 6109.54ms Time] [2021-11-12 22:39:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-11-12 22:39:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 12680. [2021-11-12 22:39:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12680 states, 9709 states have (on average 1.5742094963435986) internal successors, (15284), 10067 states have internal predecessors, (15284), 2288 states have call successors, (2288), 651 states have call predecessors, (2288), 682 states have return successors, (4073), 2265 states have call predecessors, (4073), 2262 states have call successors, (4073) [2021-11-12 22:39:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12680 states to 12680 states and 21645 transitions. [2021-11-12 22:39:38,885 INFO L78 Accepts]: Start accepts. Automaton has 12680 states and 21645 transitions. Word has length 145 [2021-11-12 22:39:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:38,886 INFO L470 AbstractCegarLoop]: Abstraction has 12680 states and 21645 transitions. [2021-11-12 22:39:38,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 22:39:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 12680 states and 21645 transitions. [2021-11-12 22:39:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 22:39:38,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:38,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:38,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:39,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:39,111 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1920992717, now seen corresponding path program 1 times [2021-11-12 22:39:39,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:39,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303438424] [2021-11-12 22:39:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:39,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:39,114 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:39,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:39:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:39,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:39:39,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:39:39,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 22:39:40,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303438424] [2021-11-12 22:39:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303438424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:40,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:40,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:39:40,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041926551] [2021-11-12 22:39:40,202 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:40,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:39:40,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:39:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:39:40,203 INFO L87 Difference]: Start difference. First operand 12680 states and 21645 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:39:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:41,071 INFO L93 Difference]: Finished difference Result 25486 states and 44575 transitions. [2021-11-12 22:39:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:39:41,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 146 [2021-11-12 22:39:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:41,150 INFO L225 Difference]: With dead ends: 25486 [2021-11-12 22:39:41,150 INFO L226 Difference]: Without dead ends: 12824 [2021-11-12 22:39:41,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:39:41,268 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 27 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2614 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.52ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:41,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 2614 Invalid, 74 Unknown, 0 Unchecked, 3.52ms Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 82.04ms Time] [2021-11-12 22:39:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-11-12 22:39:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 12800. [2021-11-12 22:39:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 9817 states have (on average 1.5691148008556586) internal successors, (15404), 10175 states have internal predecessors, (15404), 2288 states have call successors, (2288), 675 states have call predecessors, (2288), 694 states have return successors, (4041), 2253 states have call predecessors, (4041), 2262 states have call successors, (4041) [2021-11-12 22:39:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 21733 transitions. [2021-11-12 22:39:42,296 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 21733 transitions. Word has length 146 [2021-11-12 22:39:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:42,296 INFO L470 AbstractCegarLoop]: Abstraction has 12800 states and 21733 transitions. [2021-11-12 22:39:42,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:39:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 21733 transitions. [2021-11-12 22:39:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:39:42,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:42,301 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:42,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:42,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:42,524 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:42,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:42,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1512843063, now seen corresponding path program 1 times [2021-11-12 22:39:42,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:42,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985937089] [2021-11-12 22:39:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:42,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:42,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:42,526 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:42,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:39:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:42,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:39:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:39:43,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:39:43,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:43,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985937089] [2021-11-12 22:39:43,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985937089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:39:43,709 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:39:43,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:39:43,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395080368] [2021-11-12 22:39:43,709 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:43,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:39:43,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:39:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:39:43,711 INFO L87 Difference]: Start difference. First operand 12800 states and 21733 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 22:39:45,732 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 22:39:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:39:49,129 INFO L93 Difference]: Finished difference Result 45574 states and 87288 transitions. [2021-11-12 22:39:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:39:49,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 156 [2021-11-12 22:39:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:39:49,399 INFO L225 Difference]: With dead ends: 45574 [2021-11-12 22:39:49,399 INFO L226 Difference]: Without dead ends: 32792 [2021-11-12 22:39:49,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:39:49,546 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 1203 mSDsluCounter, 4826 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 145 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3258.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 6004 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.22ms SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3459.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:39:49,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 6004 Invalid, 963 Unknown, 0 Unchecked, 14.22ms Time], IncrementalHoareTripleChecker [145 Valid, 817 Invalid, 1 Unknown, 0 Unchecked, 3459.47ms Time] [2021-11-12 22:39:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32792 states. [2021-11-12 22:39:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32792 to 25708. [2021-11-12 22:39:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25708 states, 19708 states have (on average 1.5644915770245587) internal successors, (30833), 20446 states have internal predecessors, (30833), 4565 states have call successors, (4565), 1347 states have call predecessors, (4565), 1434 states have return successors, (10278), 4522 states have call predecessors, (10278), 4515 states have call successors, (10278) [2021-11-12 22:39:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25708 states to 25708 states and 45676 transitions. [2021-11-12 22:39:52,483 INFO L78 Accepts]: Start accepts. Automaton has 25708 states and 45676 transitions. Word has length 156 [2021-11-12 22:39:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:39:52,484 INFO L470 AbstractCegarLoop]: Abstraction has 25708 states and 45676 transitions. [2021-11-12 22:39:52,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 22:39:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 25708 states and 45676 transitions. [2021-11-12 22:39:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 22:39:52,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:39:52,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:39:52,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:39:52,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:39:52,711 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:39:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:39:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 742432818, now seen corresponding path program 1 times [2021-11-12 22:39:52,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:39:52,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111524665] [2021-11-12 22:39:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:39:52,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:39:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:39:52,714 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:39:52,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:39:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:39:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:39:53,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:39:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:39:53,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:39:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:39:54,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:39:54,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111524665] [2021-11-12 22:39:54,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111524665] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:39:54,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:39:54,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:39:54,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911824277] [2021-11-12 22:39:54,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:39:54,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:39:54,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:39:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:39:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:39:54,296 INFO L87 Difference]: Start difference. First operand 25708 states and 45676 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:39:56,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:39:58,325 WARN L515 Checker$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 22:40:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:01,131 INFO L93 Difference]: Finished difference Result 51590 states and 96408 transitions. [2021-11-12 22:40:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2021-11-12 22:40:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:01,305 INFO L225 Difference]: With dead ends: 51590 [2021-11-12 22:40:01,305 INFO L226 Difference]: Without dead ends: 25900 [2021-11-12 22:40:01,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:40:01,874 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 796 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4775.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.38ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4896.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:01,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2216 Invalid, 489 Unknown, 0 Unchecked, 5.38ms Time], IncrementalHoareTripleChecker [16 Valid, 471 Invalid, 2 Unknown, 0 Unchecked, 4896.06ms Time] [2021-11-12 22:40:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-11-12 22:40:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25900. [2021-11-12 22:40:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25900 states, 19852 states have (on average 1.5603969373362885) internal successors, (30977), 20590 states have internal predecessors, (30977), 4565 states have call successors, (4565), 1395 states have call predecessors, (4565), 1482 states have return successors, (10326), 4522 states have call predecessors, (10326), 4515 states have call successors, (10326) [2021-11-12 22:40:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25900 states to 25900 states and 45868 transitions. [2021-11-12 22:40:04,028 INFO L78 Accepts]: Start accepts. Automaton has 25900 states and 45868 transitions. Word has length 157 [2021-11-12 22:40:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:04,029 INFO L470 AbstractCegarLoop]: Abstraction has 25900 states and 45868 transitions. [2021-11-12 22:40:04,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:40:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 25900 states and 45868 transitions. [2021-11-12 22:40:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 22:40:04,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:04,034 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:04,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:04,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:04,249 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:04,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1559113228, now seen corresponding path program 1 times [2021-11-12 22:40:04,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:04,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399936778] [2021-11-12 22:40:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:04,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:04,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:04,253 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:04,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:40:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:05,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:40:05,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:40:05,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:40:05,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:05,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399936778] [2021-11-12 22:40:05,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399936778] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:05,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:05,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:40:05,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750108449] [2021-11-12 22:40:05,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:05,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:05,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:40:05,851 INFO L87 Difference]: Start difference. First operand 25900 states and 45868 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:40:07,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:09,879 WARN L515 Checker$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 22:40:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:12,569 INFO L93 Difference]: Finished difference Result 52022 states and 96760 transitions. [2021-11-12 22:40:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:12,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 159 [2021-11-12 22:40:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:12,708 INFO L225 Difference]: With dead ends: 52022 [2021-11-12 22:40:12,708 INFO L226 Difference]: Without dead ends: 26140 [2021-11-12 22:40:13,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:40:13,208 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 803 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4686.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.47ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4821.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:13,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 2217 Invalid, 491 Unknown, 0 Unchecked, 5.47ms Time], IncrementalHoareTripleChecker [14 Valid, 475 Invalid, 2 Unknown, 0 Unchecked, 4821.87ms Time] [2021-11-12 22:40:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26140 states. [2021-11-12 22:40:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26140 to 26140. [2021-11-12 22:40:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26140 states, 20044 states have (on average 1.5550289363400518) internal successors, (31169), 20782 states have internal predecessors, (31169), 4565 states have call successors, (4565), 1443 states have call predecessors, (4565), 1530 states have return successors, (10374), 4522 states have call predecessors, (10374), 4515 states have call successors, (10374) [2021-11-12 22:40:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26140 states to 26140 states and 46108 transitions. [2021-11-12 22:40:15,017 INFO L78 Accepts]: Start accepts. Automaton has 26140 states and 46108 transitions. Word has length 159 [2021-11-12 22:40:15,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:15,263 INFO L470 AbstractCegarLoop]: Abstraction has 26140 states and 46108 transitions. [2021-11-12 22:40:15,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:40:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 26140 states and 46108 transitions. [2021-11-12 22:40:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 22:40:15,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:15,266 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:15,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:15,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:15,467 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1311372146, now seen corresponding path program 1 times [2021-11-12 22:40:15,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:15,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771357139] [2021-11-12 22:40:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:15,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:15,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:15,469 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:15,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:40:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:15,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:40:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:40:16,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:40:16,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:16,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771357139] [2021-11-12 22:40:16,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771357139] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:16,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:16,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:40:16,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914460385] [2021-11-12 22:40:16,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:16,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:16,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:40:16,712 INFO L87 Difference]: Start difference. First operand 26140 states and 46108 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:40:18,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:20,738 WARN L515 Checker$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 22:40:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:23,510 INFO L93 Difference]: Finished difference Result 52550 states and 97232 transitions. [2021-11-12 22:40:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:23,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 161 [2021-11-12 22:40:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:23,732 INFO L225 Difference]: With dead ends: 52550 [2021-11-12 22:40:23,732 INFO L226 Difference]: Without dead ends: 26428 [2021-11-12 22:40:24,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:40:24,363 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 794 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4683.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.43ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4803.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:24,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 2217 Invalid, 490 Unknown, 0 Unchecked, 5.43ms Time], IncrementalHoareTripleChecker [12 Valid, 476 Invalid, 2 Unknown, 0 Unchecked, 4803.60ms Time] [2021-11-12 22:40:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2021-11-12 22:40:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 26428. [2021-11-12 22:40:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26428 states, 20284 states have (on average 1.5484618418457898) internal successors, (31409), 21022 states have internal predecessors, (31409), 4565 states have call successors, (4565), 1491 states have call predecessors, (4565), 1578 states have return successors, (10422), 4522 states have call predecessors, (10422), 4515 states have call successors, (10422) [2021-11-12 22:40:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26428 states to 26428 states and 46396 transitions. [2021-11-12 22:40:25,973 INFO L78 Accepts]: Start accepts. Automaton has 26428 states and 46396 transitions. Word has length 161 [2021-11-12 22:40:25,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:25,974 INFO L470 AbstractCegarLoop]: Abstraction has 26428 states and 46396 transitions. [2021-11-12 22:40:25,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:40:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26428 states and 46396 transitions. [2021-11-12 22:40:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 22:40:25,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:25,977 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:25,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:26,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:26,188 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:26,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1647871532, now seen corresponding path program 1 times [2021-11-12 22:40:26,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:26,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679830826] [2021-11-12 22:40:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:26,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:26,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:26,191 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:26,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:40:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:26,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:40:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:40:27,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:40:27,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:27,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679830826] [2021-11-12 22:40:27,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679830826] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:27,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:27,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:40:27,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178164995] [2021-11-12 22:40:27,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:27,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:27,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:27,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:27,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:40:27,770 INFO L87 Difference]: Start difference. First operand 26428 states and 46396 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:40:29,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:31,795 WARN L515 Checker$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 22:40:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:34,660 INFO L93 Difference]: Finished difference Result 53174 states and 97812 transitions. [2021-11-12 22:40:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:40:34,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2021-11-12 22:40:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:34,832 INFO L225 Difference]: With dead ends: 53174 [2021-11-12 22:40:34,832 INFO L226 Difference]: Without dead ends: 26764 [2021-11-12 22:40:35,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:40:35,362 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 795 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4711.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.55ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4832.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:35,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 2217 Invalid, 489 Unknown, 0 Unchecked, 5.55ms Time], IncrementalHoareTripleChecker [10 Valid, 477 Invalid, 2 Unknown, 0 Unchecked, 4832.88ms Time] [2021-11-12 22:40:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26764 states. [2021-11-12 22:40:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26764 to 26764. [2021-11-12 22:40:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26764 states, 20572 states have (on average 1.5407835893447404) internal successors, (31697), 21310 states have internal predecessors, (31697), 4565 states have call successors, (4565), 1539 states have call predecessors, (4565), 1626 states have return successors, (10470), 4522 states have call predecessors, (10470), 4515 states have call successors, (10470) [2021-11-12 22:40:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26764 states to 26764 states and 46732 transitions. [2021-11-12 22:40:36,934 INFO L78 Accepts]: Start accepts. Automaton has 26764 states and 46732 transitions. Word has length 163 [2021-11-12 22:40:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:36,935 INFO L470 AbstractCegarLoop]: Abstraction has 26764 states and 46732 transitions. [2021-11-12 22:40:36,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:40:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 26764 states and 46732 transitions. [2021-11-12 22:40:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:40:36,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:36,937 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:36,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:37,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:37,138 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1562831694, now seen corresponding path program 1 times [2021-11-12 22:40:37,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:37,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91247630] [2021-11-12 22:40:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:37,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:37,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:37,140 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:37,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:40:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:37,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:40:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:40:38,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 22:40:38,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:38,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91247630] [2021-11-12 22:40:38,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91247630] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:38,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:38,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-12 22:40:38,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562174158] [2021-11-12 22:40:38,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:38,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:40:38,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:40:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:40:38,838 INFO L87 Difference]: Start difference. First operand 26764 states and 46732 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-12 22:40:40,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:42,866 WARN L515 Checker$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 22:40:44,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:40:46,878 WARN L515 Checker$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 22:40:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:52,734 INFO L93 Difference]: Finished difference Result 59870 states and 111466 transitions. [2021-11-12 22:40:52,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:40:52,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-12 22:40:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:53,167 INFO L225 Difference]: With dead ends: 59870 [2021-11-12 22:40:53,168 INFO L226 Difference]: Without dead ends: 33124 [2021-11-12 22:40:53,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:40:53,402 INFO L933 BasicCegarLoop]: 1106 mSDtfsCounter, 2394 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 331 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10973.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2451 SdHoareTripleChecker+Valid, 3971 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.36ms SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11431.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:53,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2451 Valid, 3971 Invalid, 2376 Unknown, 0 Unchecked, 17.36ms Time], IncrementalHoareTripleChecker [331 Valid, 2041 Invalid, 4 Unknown, 0 Unchecked, 11431.84ms Time] [2021-11-12 22:40:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33124 states. [2021-11-12 22:40:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33124 to 26764. [2021-11-12 22:40:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26764 states, 20572 states have (on average 1.5400058331713007) internal successors, (31681), 21310 states have internal predecessors, (31681), 4565 states have call successors, (4565), 1539 states have call predecessors, (4565), 1626 states have return successors, (10470), 4522 states have call predecessors, (10470), 4515 states have call successors, (10470) [2021-11-12 22:40:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26764 states to 26764 states and 46716 transitions. [2021-11-12 22:40:55,305 INFO L78 Accepts]: Start accepts. Automaton has 26764 states and 46716 transitions. Word has length 165 [2021-11-12 22:40:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:55,306 INFO L470 AbstractCegarLoop]: Abstraction has 26764 states and 46716 transitions. [2021-11-12 22:40:55,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-12 22:40:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 26764 states and 46716 transitions. [2021-11-12 22:40:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:40:55,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:55,308 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:40:55,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:40:55,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:40:55,509 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1540540050, now seen corresponding path program 1 times [2021-11-12 22:40:55,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:40:55,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576024951] [2021-11-12 22:40:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:55,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:40:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:40:55,511 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:40:55,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:40:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:40:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:40:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 22:40:56,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:40:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:40:56,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:40:56,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576024951] [2021-11-12 22:40:56,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576024951] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:40:56,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:40:56,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-12 22:40:56,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642455369] [2021-11-12 22:40:56,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:56,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:40:56,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:40:56,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:40:56,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:40:56,836 INFO L87 Difference]: Start difference. First operand 26764 states and 46716 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:40:58,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:04,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:04,710 INFO L93 Difference]: Finished difference Result 90198 states and 173374 transitions. [2021-11-12 22:41:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:41:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 171 [2021-11-12 22:41:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:05,279 INFO L225 Difference]: With dead ends: 90198 [2021-11-12 22:41:05,279 INFO L226 Difference]: Without dead ends: 63452 [2021-11-12 22:41:05,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:41:05,977 INFO L933 BasicCegarLoop]: 1332 mSDtfsCounter, 1030 mSDsluCounter, 6076 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 92 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3314.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 7408 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.92ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3509.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:05,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 7408 Invalid, 1123 Unknown, 0 Unchecked, 16.92ms Time], IncrementalHoareTripleChecker [92 Valid, 1030 Invalid, 1 Unknown, 0 Unchecked, 3509.62ms Time] [2021-11-12 22:41:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63452 states. [2021-11-12 22:41:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63452 to 61092. [2021-11-12 22:41:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61092 states, 44924 states have (on average 1.530540468346541) internal successors, (68758), 47262 states have internal predecessors, (68758), 12773 states have call successors, (12773), 3075 states have call predecessors, (12773), 3394 states have return successors, (33451), 12786 states have call predecessors, (33451), 12675 states have call successors, (33451) [2021-11-12 22:41:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61092 states to 61092 states and 114982 transitions. [2021-11-12 22:41:12,037 INFO L78 Accepts]: Start accepts. Automaton has 61092 states and 114982 transitions. Word has length 171 [2021-11-12 22:41:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:12,037 INFO L470 AbstractCegarLoop]: Abstraction has 61092 states and 114982 transitions. [2021-11-12 22:41:12,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:41:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 61092 states and 114982 transitions. [2021-11-12 22:41:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:41:12,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:12,042 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:12,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:12,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:12,243 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:12,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:12,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1123124914, now seen corresponding path program 1 times [2021-11-12 22:41:12,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:12,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537459397] [2021-11-12 22:41:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:12,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:12,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:12,246 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:12,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c947e5ea-9a4e-4fcd-b954-dd9bd4bddac4/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:41:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:41:12,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:41:13,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:41:13,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:13,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537459397] [2021-11-12 22:41:13,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537459397] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:41:13,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:41:13,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 22:41:13,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349027305] [2021-11-12 22:41:13,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:13,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:41:13,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:41:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:41:13,823 INFO L87 Difference]: Start difference. First operand 61092 states and 114982 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 22:41:15,857 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 22:41:17,865 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 []