./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.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_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/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_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/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_68bd845e-a773-4fae-b2d9-7e3af145a755/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 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:08,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:08,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:09,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:09,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:09,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:09,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:09,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:09,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:09,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:09,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:09,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:09,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:09,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:09,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:09,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:09,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:09,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:09,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:09,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:09,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:09,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:09,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:09,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:09,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:09,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:09,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:09,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:09,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:09,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:09,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:09,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:09,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:09,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:09,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:09,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:09,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:09,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:09,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:09,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:09,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:09,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:53:09,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:09,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:09,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:09,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:09,158 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:09,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:09,158 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:09,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:53:09,159 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:09,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:09,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:53:09,159 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:53:09,160 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:09,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:53:09,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:53:09,160 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:53:09,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:09,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:09,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:53:09,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:09,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:09,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:09,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:09,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:09,163 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:09,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:09,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:09,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:09,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:09,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:09,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:09,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:09,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:09,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:09,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:09,165 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:53:09,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:53:09,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:09,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:09,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:09,166 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_68bd845e-a773-4fae-b2d9-7e3af145a755/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 [2021-11-12 22:53:09,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:09,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:09,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:09,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:09,423 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:09,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2021-11-12 22:53:09,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data/b1cbc0fca/d35fbc95ef0f477daeab5500fa99c8bc/FLAG5323efce4 [2021-11-12 22:53:10,162 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:10,166 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2021-11-12 22:53:10,186 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data/b1cbc0fca/d35fbc95ef0f477daeab5500fa99c8bc/FLAG5323efce4 [2021-11-12 22:53:10,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data/b1cbc0fca/d35fbc95ef0f477daeab5500fa99c8bc [2021-11-12 22:53:10,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:10,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:10,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:10,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:10,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:10,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:10" (1/1) ... [2021-11-12 22:53:10,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ac58fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:10, skipping insertion in model container [2021-11-12 22:53:10,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:10" (1/1) ... [2021-11-12 22:53:10,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:10,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:10,657 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_68bd845e-a773-4fae-b2d9-7e3af145a755/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2021-11-12 22:53:10,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:10,957 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 22:53:10,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@350806e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:10, skipping insertion in model container [2021-11-12 22:53:10,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:10,958 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:53:10,961 INFO L158 Benchmark]: Toolchain (without parser) took 641.85ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 61.7MB in the beginning and 83.1MB in the end (delta: -21.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:53:10,962 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 51.9MB in the beginning and 51.8MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:53:10,964 INFO L158 Benchmark]: CACSL2BoogieTranslator took 635.18ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 61.5MB in the beginning and 83.1MB in the end (delta: -21.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:53:10,966 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 96.5MB. Free memory was 51.9MB in the beginning and 51.8MB in the end (delta: 45.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 635.18ms. Allocated memory was 96.5MB in the beginning and 123.7MB in the end (delta: 27.3MB). Free memory was 61.5MB in the beginning and 83.1MB in the end (delta: -21.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2804]: 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_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/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_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/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_68bd845e-a773-4fae-b2d9-7e3af145a755/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 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:13,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:13,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:13,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:13,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:13,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:13,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:13,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:13,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:13,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:13,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:13,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:13,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:13,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:13,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:13,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:13,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:13,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:13,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:13,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:13,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:13,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:13,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:13,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:13,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:13,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:13,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:13,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:13,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:13,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:13,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:13,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:13,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:13,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:13,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:13,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:13,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:13,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:13,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:13,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:13,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:13,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:53:13,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:13,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:13,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:13,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:13,345 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:13,345 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:13,345 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:13,345 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:13,346 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:13,346 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:13,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:13,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:13,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:13,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:13,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:13,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:13,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:13,350 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:13,350 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:53:13,350 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:53:13,351 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:13,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:13,351 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:13,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:13,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:13,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:53:13,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:13,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:13,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:13,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:13,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:13,353 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:53:13,354 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:13,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:13,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:13,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:13,355 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_68bd845e-a773-4fae-b2d9-7e3af145a755/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 [2021-11-12 22:53:13,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:13,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:13,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:13,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:13,706 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:13,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2021-11-12 22:53:13,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data/20280d14d/5b031e939b1e4657a06e5eeb1ffc73bb/FLAG8fd6eec91 [2021-11-12 22:53:14,485 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:14,486 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2021-11-12 22:53:14,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data/20280d14d/5b031e939b1e4657a06e5eeb1ffc73bb/FLAG8fd6eec91 [2021-11-12 22:53:14,645 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/data/20280d14d/5b031e939b1e4657a06e5eeb1ffc73bb [2021-11-12 22:53:14,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:14,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:14,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:14,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:14,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:14,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:14" (1/1) ... [2021-11-12 22:53:14,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152f11f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:14, skipping insertion in model container [2021-11-12 22:53:14,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:14" (1/1) ... [2021-11-12 22:53:14,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:14,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:15,009 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_68bd845e-a773-4fae-b2d9-7e3af145a755/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2021-11-12 22:53:15,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:15,441 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:53:15,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:15,486 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_68bd845e-a773-4fae-b2d9-7e3af145a755/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2021-11-12 22:53:15,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:15,587 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:53:15,620 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_68bd845e-a773-4fae-b2d9-7e3af145a755/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2021-11-12 22:53:15,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:15,776 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:53:15,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15 WrapperNode [2021-11-12 22:53:15,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:15,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:15,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:53:15,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:53:15,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:15,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:15,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:15,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:53:15,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:53:15,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:53:15,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:15,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:15,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:15,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:16,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:16,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:16,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:16,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:53:16,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:53:16,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:53:16,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:53:16,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (1/1) ... [2021-11-12 22:53:16,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:16,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:53:16,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:53:16,171 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:53:16,172 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:53:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:53:16,172 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:53:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:53:16,172 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:53:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:53:16,173 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:53:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:53:16,173 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:53:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:53:16,173 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:53:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:53:16,174 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:53:16,174 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:53:16,174 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:53:16,174 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:53:16,174 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:53:16,174 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:53:16,175 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:53:16,175 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:53:16,175 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:53:16,175 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 22:53:16,175 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 22:53:16,175 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:53:16,176 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:53:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:53:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:53:16,176 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:53:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:53:16,176 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:53:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:53:16,177 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:53:16,177 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:53:16,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:53:16,177 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:53:16,177 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:53:16,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:53:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:53:16,178 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:53:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:53:16,178 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:53:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:53:16,178 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:53:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:53:16,179 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:53:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:53:16,179 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:53:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-12 22:53:16,179 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-12 22:53:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:53:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:53:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:53:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:53:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:53:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:53:20,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:53:20,139 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:53:20,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:20 BoogieIcfgContainer [2021-11-12 22:53:20,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:53:20,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:53:20,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:53:20,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:53:20,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:53:14" (1/3) ... [2021-11-12 22:53:20,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7530dd52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:20, skipping insertion in model container [2021-11-12 22:53:20,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:15" (2/3) ... [2021-11-12 22:53:20,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7530dd52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:20, skipping insertion in model container [2021-11-12 22:53:20,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:20" (3/3) ... [2021-11-12 22:53:20,152 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product31.cil.c [2021-11-12 22:53:20,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:53:20,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:53:20,221 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:53:20,228 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 22:53:20,228 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:53:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 587 states, 460 states have (on average 1.682608695652174) internal successors, (774), 481 states have internal predecessors, (774), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 22:53:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:53:20,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:20,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:20,297 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:20,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash 450011275, now seen corresponding path program 1 times [2021-11-12 22:53:20,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:20,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333387019] [2021-11-12 22:53:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:20,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:20,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:20,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:20,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:53:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:20,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:53:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:21,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:21,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:21,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333387019] [2021-11-12 22:53:21,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333387019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:21,505 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:21,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:53:21,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567045718] [2021-11-12 22:53:21,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:21,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:53:21,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:21,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:53:21,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:53:21,558 INFO L87 Difference]: Start difference. First operand has 587 states, 460 states have (on average 1.682608695652174) internal successors, (774), 481 states have internal predecessors, (774), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:53:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:21,666 INFO L93 Difference]: Finished difference Result 608 states and 1002 transitions. [2021-11-12 22:53:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:53:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 106 [2021-11-12 22:53:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:21,701 INFO L225 Difference]: With dead ends: 608 [2021-11-12 22:53:21,702 INFO L226 Difference]: Without dead ends: 579 [2021-11-12 22:53:21,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:53:21,711 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:21,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 11.52ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:53:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-12 22:53:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2021-11-12 22:53:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 454 states have (on average 1.6806167400881058) internal successors, (763), 473 states have internal predecessors, (763), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 22:53:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 956 transitions. [2021-11-12 22:53:21,864 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 956 transitions. Word has length 106 [2021-11-12 22:53:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:21,866 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 956 transitions. [2021-11-12 22:53:21,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:53:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 956 transitions. [2021-11-12 22:53:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 22:53:21,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:21,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:21,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:22,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash -308815878, now seen corresponding path program 1 times [2021-11-12 22:53:22,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:22,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369277169] [2021-11-12 22:53:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:22,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:22,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:22,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:22,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:53:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:22,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:22,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:23,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:23,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369277169] [2021-11-12 22:53:23,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369277169] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:23,312 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:23,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:53:23,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072266543] [2021-11-12 22:53:23,316 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:23,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:53:23,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:23,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:53:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:23,319 INFO L87 Difference]: Start difference. First operand 579 states and 956 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-12 22:53:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:23,517 INFO L93 Difference]: Finished difference Result 1142 states and 1890 transitions. [2021-11-12 22:53:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 108 [2021-11-12 22:53:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:23,525 INFO L225 Difference]: With dead ends: 1142 [2021-11-12 22:53:23,525 INFO L226 Difference]: Without dead ends: 579 [2021-11-12 22:53:23,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:23,536 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 15 mSDsluCounter, 3762 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4705 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.52ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:23,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4705 Invalid, 45 Unknown, 0 Unchecked, 46.52ms Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 49.95ms Time] [2021-11-12 22:53:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-12 22:53:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2021-11-12 22:53:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 454 states have (on average 1.6674008810572687) internal successors, (757), 473 states have internal predecessors, (757), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 22:53:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 950 transitions. [2021-11-12 22:53:23,571 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 950 transitions. Word has length 108 [2021-11-12 22:53:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:23,571 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 950 transitions. [2021-11-12 22:53:23,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-12 22:53:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 950 transitions. [2021-11-12 22:53:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:53:23,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:23,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:23,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:23,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:23,796 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1956418293, now seen corresponding path program 1 times [2021-11-12 22:53:23,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:23,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675823924] [2021-11-12 22:53:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:23,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:23,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:23,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:23,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:53:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:53:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:24,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:25,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:25,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675823924] [2021-11-12 22:53:25,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675823924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:25,077 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:25,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:53:25,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980817230] [2021-11-12 22:53:25,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:25,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:53:25,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:53:25,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:53:25,080 INFO L87 Difference]: Start difference. First operand 579 states and 950 transitions. Second operand has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:53:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:25,268 INFO L93 Difference]: Finished difference Result 1100 states and 1807 transitions. [2021-11-12 22:53:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:53:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 113 [2021-11-12 22:53:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:25,276 INFO L225 Difference]: With dead ends: 1100 [2021-11-12 22:53:25,276 INFO L226 Difference]: Without dead ends: 573 [2021-11-12 22:53:25,280 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 22:53:25,281 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 118 mSDsluCounter, 6390 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 7327 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:25,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 7327 Invalid, 85 Unknown, 0 Unchecked, 16.43ms Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 99.79ms Time] [2021-11-12 22:53:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-12 22:53:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-12 22:53:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 448 states have (on average 1.6607142857142858) internal successors, (744), 467 states have internal predecessors, (744), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 22:53:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 937 transitions. [2021-11-12 22:53:25,311 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 937 transitions. Word has length 113 [2021-11-12 22:53:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:25,311 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 937 transitions. [2021-11-12 22:53:25,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:53:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 937 transitions. [2021-11-12 22:53:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:53:25,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:25,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:25,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:53:25,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:25,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:25,544 INFO L85 PathProgramCache]: Analyzing trace with hash 216184503, now seen corresponding path program 1 times [2021-11-12 22:53:25,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:25,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454787032] [2021-11-12 22:53:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:25,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:25,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:25,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:25,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:53:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:26,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:26,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:26,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454787032] [2021-11-12 22:53:26,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454787032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:26,693 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:26,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:53:26,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650385847] [2021-11-12 22:53:26,694 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:26,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:53:26,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:53:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:26,696 INFO L87 Difference]: Start difference. First operand 573 states and 937 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:53:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:26,894 INFO L93 Difference]: Finished difference Result 1103 states and 1808 transitions. [2021-11-12 22:53:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 114 [2021-11-12 22:53:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:26,900 INFO L225 Difference]: With dead ends: 1103 [2021-11-12 22:53:26,901 INFO L226 Difference]: Without dead ends: 573 [2021-11-12 22:53:26,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:26,911 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 215 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.46ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:26,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1787 Invalid, 122 Unknown, 0 Unchecked, 5.46ms Time], IncrementalHoareTripleChecker [26 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 119.04ms Time] [2021-11-12 22:53:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-12 22:53:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-12 22:53:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 448 states have (on average 1.6071428571428572) internal successors, (720), 467 states have internal predecessors, (720), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 22:53:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 913 transitions. [2021-11-12 22:53:26,945 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 913 transitions. Word has length 114 [2021-11-12 22:53:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:26,945 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 913 transitions. [2021-11-12 22:53:26,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:53:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 913 transitions. [2021-11-12 22:53:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:53:26,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:26,953 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:26,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:27,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:27,167 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash -825718692, now seen corresponding path program 1 times [2021-11-12 22:53:27,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:27,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036445495] [2021-11-12 22:53:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:27,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:27,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:27,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:27,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:53:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:27,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:53:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:27,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:28,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:28,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036445495] [2021-11-12 22:53:28,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036445495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:28,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:28,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:53:28,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770250417] [2021-11-12 22:53:28,376 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:28,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:53:28,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:53:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:28,378 INFO L87 Difference]: Start difference. First operand 573 states and 913 transitions. Second operand has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:53:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:28,631 INFO L93 Difference]: Finished difference Result 1094 states and 1770 transitions. [2021-11-12 22:53:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:53:28,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 116 [2021-11-12 22:53:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:28,643 INFO L225 Difference]: With dead ends: 1094 [2021-11-12 22:53:28,643 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 22:53:28,647 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 22:53:28,647 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 117 mSDsluCounter, 4442 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5343 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:28,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5343 Invalid, 57 Unknown, 0 Unchecked, 10.02ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 150.30ms Time] [2021-11-12 22:53:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 22:53:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 22:53:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 427 states have (on average 1.6276346604215457) internal successors, (695), 446 states have internal predecessors, (695), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 22:53:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 888 transitions. [2021-11-12 22:53:28,680 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 888 transitions. Word has length 116 [2021-11-12 22:53:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:28,685 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 888 transitions. [2021-11-12 22:53:28,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:53:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 888 transitions. [2021-11-12 22:53:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:53:28,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:28,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:28,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 22:53:28,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:28,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1765822046, now seen corresponding path program 1 times [2021-11-12 22:53:28,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:28,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910104518] [2021-11-12 22:53:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:28,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:28,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:28,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:53:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:29,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:53:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:29,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:53:30,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:30,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910104518] [2021-11-12 22:53:30,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910104518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:30,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:30,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:53:30,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114313754] [2021-11-12 22:53:30,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:30,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:53:30,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:53:30,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:53:30,379 INFO L87 Difference]: Start difference. First operand 552 states and 888 transitions. Second operand has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:53:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:30,557 INFO L93 Difference]: Finished difference Result 1067 states and 1734 transitions. [2021-11-12 22:53:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:53:30,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 119 [2021-11-12 22:53:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:30,563 INFO L225 Difference]: With dead ends: 1067 [2021-11-12 22:53:30,563 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 22:53:30,567 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 22:53:30,568 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 60 mSDsluCounter, 4348 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:30,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 5221 Invalid, 79 Unknown, 0 Unchecked, 10.45ms Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 91.26ms Time] [2021-11-12 22:53:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 22:53:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 22:53:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 427 states have (on average 1.6252927400468384) internal successors, (694), 446 states have internal predecessors, (694), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 22:53:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 887 transitions. [2021-11-12 22:53:30,595 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 887 transitions. Word has length 119 [2021-11-12 22:53:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:30,596 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 887 transitions. [2021-11-12 22:53:30,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:53:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 887 transitions. [2021-11-12 22:53:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:53:30,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:30,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:30,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:30,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:30,820 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:30,820 INFO L85 PathProgramCache]: Analyzing trace with hash -230288650, now seen corresponding path program 1 times [2021-11-12 22:53:30,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:30,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509319456] [2021-11-12 22:53:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:30,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:30,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:30,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:30,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:53:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:31,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:31,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:32,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:32,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509319456] [2021-11-12 22:53:32,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509319456] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:32,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:32,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:32,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213573643] [2021-11-12 22:53:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:32,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:32,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:32,137 INFO L87 Difference]: Start difference. First operand 552 states and 887 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:34,168 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 22:53:36,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:37,176 INFO L93 Difference]: Finished difference Result 1063 states and 1754 transitions. [2021-11-12 22:53:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:37,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 120 [2021-11-12 22:53:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:37,183 INFO L225 Difference]: With dead ends: 1063 [2021-11-12 22:53:37,183 INFO L226 Difference]: Without dead ends: 556 [2021-11-12 22:53:37,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 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 22:53:37,188 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 838 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4835.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.03ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4958.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:37,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 2214 Invalid, 449 Unknown, 0 Unchecked, 11.03ms Time], IncrementalHoareTripleChecker [16 Valid, 431 Invalid, 2 Unknown, 0 Unchecked, 4958.41ms Time] [2021-11-12 22:53:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-12 22:53:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-11-12 22:53:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 430 states have (on average 1.6209302325581396) internal successors, (697), 449 states have internal predecessors, (697), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-12 22:53:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 891 transitions. [2021-11-12 22:53:37,221 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 891 transitions. Word has length 120 [2021-11-12 22:53:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:37,222 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 891 transitions. [2021-11-12 22:53:37,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 891 transitions. [2021-11-12 22:53:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:53:37,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:37,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:37,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:37,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:37,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash -45140950, now seen corresponding path program 1 times [2021-11-12 22:53:37,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:37,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195347393] [2021-11-12 22:53:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:37,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:37,447 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:37,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:53:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:37,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:38,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:38,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:38,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195347393] [2021-11-12 22:53:38,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195347393] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:38,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:38,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:38,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004289889] [2021-11-12 22:53:38,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:38,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:38,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:38,767 INFO L87 Difference]: Start difference. First operand 556 states and 891 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:40,796 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 22:53:42,802 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 22:53:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:43,744 INFO L93 Difference]: Finished difference Result 1072 states and 1761 transitions. [2021-11-12 22:53:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:43,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 122 [2021-11-12 22:53:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:43,751 INFO L225 Difference]: With dead ends: 1072 [2021-11-12 22:53:43,751 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 22:53:43,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 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 22:53:43,756 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 826 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4773.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.07ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4895.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:43,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2215 Invalid, 451 Unknown, 0 Unchecked, 10.07ms Time], IncrementalHoareTripleChecker [14 Valid, 435 Invalid, 2 Unknown, 0 Unchecked, 4895.08ms Time] [2021-11-12 22:53:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 22:53:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 22:53:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 434 states have (on average 1.6152073732718895) internal successors, (701), 453 states have internal predecessors, (701), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-12 22:53:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 896 transitions. [2021-11-12 22:53:43,783 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 896 transitions. Word has length 122 [2021-11-12 22:53:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:43,784 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 896 transitions. [2021-11-12 22:53:43,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 896 transitions. [2021-11-12 22:53:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 22:53:43,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:43,789 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] [2021-11-12 22:53:43,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:44,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:44,008 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1238599158, now seen corresponding path program 1 times [2021-11-12 22:53:44,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:44,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980850937] [2021-11-12 22:53:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:44,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:44,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:44,010 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:44,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:53:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:44,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:45,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:45,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980850937] [2021-11-12 22:53:45,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980850937] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:45,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:45,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:45,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980943993] [2021-11-12 22:53:45,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:45,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:45,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:45,351 INFO L87 Difference]: Start difference. First operand 561 states and 896 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:47,380 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 22:53:49,386 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 22:53:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:50,279 INFO L93 Difference]: Finished difference Result 1083 states and 1770 transitions. [2021-11-12 22:53:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 124 [2021-11-12 22:53:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:50,284 INFO L225 Difference]: With dead ends: 1083 [2021-11-12 22:53:50,284 INFO L226 Difference]: Without dead ends: 567 [2021-11-12 22:53:50,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 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 22:53:50,288 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 824 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4734.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.64ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4856.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:50,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 2215 Invalid, 450 Unknown, 0 Unchecked, 9.64ms Time], IncrementalHoareTripleChecker [12 Valid, 436 Invalid, 2 Unknown, 0 Unchecked, 4856.20ms Time] [2021-11-12 22:53:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-12 22:53:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-12 22:53:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 439 states have (on average 1.6082004555808656) internal successors, (706), 458 states have internal predecessors, (706), 99 states have call successors, (99), 29 states have call predecessors, (99), 28 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-12 22:53:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 902 transitions. [2021-11-12 22:53:50,334 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 902 transitions. Word has length 124 [2021-11-12 22:53:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:50,335 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 902 transitions. [2021-11-12 22:53:50,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 902 transitions. [2021-11-12 22:53:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:53:50,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:50,340 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:50,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:50,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:50,555 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:50,556 INFO L85 PathProgramCache]: Analyzing trace with hash -670444638, now seen corresponding path program 1 times [2021-11-12 22:53:50,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:50,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051073503] [2021-11-12 22:53:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:50,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:50,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:50,558 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:50,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:53:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:51,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:51,357 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 22:53:51,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:51,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:51,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051073503] [2021-11-12 22:53:51,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051073503] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:51,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:51,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:51,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925473020] [2021-11-12 22:53:51,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:51,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:51,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:51,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:51,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:51,948 INFO L87 Difference]: Start difference. First operand 567 states and 902 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:53,974 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 22:53:55,982 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 22:53:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:56,847 INFO L93 Difference]: Finished difference Result 1096 states and 1781 transitions. [2021-11-12 22:53:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 126 [2021-11-12 22:53:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:56,855 INFO L225 Difference]: With dead ends: 1096 [2021-11-12 22:53:56,855 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 22:53:56,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 243 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 22:53:56,859 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 833 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4676.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.19ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4814.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:56,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 2215 Invalid, 449 Unknown, 0 Unchecked, 7.19ms Time], IncrementalHoareTripleChecker [10 Valid, 437 Invalid, 2 Unknown, 0 Unchecked, 4814.79ms Time] [2021-11-12 22:53:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 22:53:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 22:53:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 445 states have (on average 1.6) internal successors, (712), 464 states have internal predecessors, (712), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2021-11-12 22:53:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 909 transitions. [2021-11-12 22:53:56,886 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 909 transitions. Word has length 126 [2021-11-12 22:53:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:56,886 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 909 transitions. [2021-11-12 22:53:56,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:53:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 909 transitions. [2021-11-12 22:53:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:53:56,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:56,892 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] [2021-11-12 22:53:56,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:57,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:57,110 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:57,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:57,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1704102154, now seen corresponding path program 1 times [2021-11-12 22:53:57,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:57,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54106852] [2021-11-12 22:53:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:57,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:57,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:57,112 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:57,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:53:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:57,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:53:57,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:53:58,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:59,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:59,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54106852] [2021-11-12 22:53:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54106852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:59,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1199374460] [2021-11-12 22:53:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:59,152 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:59,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:59,156 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:59,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:53:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:59,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:59,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:53:59,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:00,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1199374460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:00,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:00,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:54:00,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875973674] [2021-11-12 22:54:00,060 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:00,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:00,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:00,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:00,063 INFO L87 Difference]: Start difference. First operand 574 states and 909 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:54:02,085 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 22:54:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:02,158 INFO L93 Difference]: Finished difference Result 1627 states and 2636 transitions. [2021-11-12 22:54:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 128 [2021-11-12 22:54:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:02,170 INFO L225 Difference]: With dead ends: 1627 [2021-11-12 22:54:02,170 INFO L226 Difference]: Without dead ends: 1098 [2021-11-12 22:54:02,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:02,174 INFO L933 BasicCegarLoop]: 1614 mSDtfsCounter, 831 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2030.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2044.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:02,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 2496 Invalid, 9 Unknown, 0 Unchecked, 5.26ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2044.56ms Time] [2021-11-12 22:54:02,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-11-12 22:54:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1078. [2021-11-12 22:54:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 839 states have (on average 1.6221692491060786) internal successors, (1361), 871 states have internal predecessors, (1361), 184 states have call successors, (184), 54 states have call predecessors, (184), 54 states have return successors, (193), 178 states have call predecessors, (193), 179 states have call successors, (193) [2021-11-12 22:54:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1738 transitions. [2021-11-12 22:54:02,229 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1738 transitions. Word has length 128 [2021-11-12 22:54:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:02,230 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1738 transitions. [2021-11-12 22:54:02,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:54:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1738 transitions. [2021-11-12 22:54:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:54:02,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:02,235 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] [2021-11-12 22:54:02,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:02,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 22:54:02,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:02,639 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash -317898760, now seen corresponding path program 1 times [2021-11-12 22:54:02,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:02,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138701941] [2021-11-12 22:54:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:02,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:02,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:02,641 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:02,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:54:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:54:03,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:54:03,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:54:04,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:04,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138701941] [2021-11-12 22:54:04,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138701941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:04,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815891045] [2021-11-12 22:54:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:04,932 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:04,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:04,935 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:04,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:54:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:05,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:05,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:05,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:05,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815891045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:05,835 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:05,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:54:05,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967991513] [2021-11-12 22:54:05,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:05,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:05,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:05,837 INFO L87 Difference]: Start difference. First operand 1078 states and 1738 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:05,945 INFO L93 Difference]: Finished difference Result 3134 states and 5124 transitions. [2021-11-12 22:54:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:05,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 128 [2021-11-12 22:54:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:05,966 INFO L225 Difference]: With dead ends: 3134 [2021-11-12 22:54:05,966 INFO L226 Difference]: Without dead ends: 2101 [2021-11-12 22:54:05,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:05,972 INFO L933 BasicCegarLoop]: 1068 mSDtfsCounter, 871 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.44ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:05,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 1896 Invalid, 10 Unknown, 0 Unchecked, 4.44ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 33.71ms Time] [2021-11-12 22:54:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-11-12 22:54:06,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 2099. [2021-11-12 22:54:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 1635 states have (on average 1.6324159021406728) internal successors, (2669), 1695 states have internal predecessors, (2669), 358 states have call successors, (358), 103 states have call predecessors, (358), 105 states have return successors, (400), 352 states have call predecessors, (400), 353 states have call successors, (400) [2021-11-12 22:54:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 3427 transitions. [2021-11-12 22:54:06,106 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 3427 transitions. Word has length 128 [2021-11-12 22:54:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:06,107 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 3427 transitions. [2021-11-12 22:54:06,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 3427 transitions. [2021-11-12 22:54:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:54:06,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:06,113 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] [2021-11-12 22:54:06,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:06,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:06,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:06,531 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:06,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1265069021, now seen corresponding path program 1 times [2021-11-12 22:54:06,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:06,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381563626] [2021-11-12 22:54:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:06,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:06,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:06,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:54:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:06,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:54:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:54:07,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:54:08,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:08,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381563626] [2021-11-12 22:54:08,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381563626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:08,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1801632909] [2021-11-12 22:54:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:08,437 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:08,437 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:08,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:54:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:08,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:09,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:09,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1801632909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:09,292 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:09,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:54:09,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991087111] [2021-11-12 22:54:09,293 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:09,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:09,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:09,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:09,294 INFO L87 Difference]: Start difference. First operand 2099 states and 3427 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:09,468 INFO L93 Difference]: Finished difference Result 6199 states and 10232 transitions. [2021-11-12 22:54:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 129 [2021-11-12 22:54:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:09,534 INFO L225 Difference]: With dead ends: 6199 [2021-11-12 22:54:09,535 INFO L226 Difference]: Without dead ends: 4145 [2021-11-12 22:54:09,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:09,545 INFO L933 BasicCegarLoop]: 1028 mSDtfsCounter, 870 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.56ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:09,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1859 Invalid, 10 Unknown, 0 Unchecked, 4.56ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 37.26ms Time] [2021-11-12 22:54:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4145 states. [2021-11-12 22:54:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4145 to 4142. [2021-11-12 22:54:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4142 states, 3228 states have (on average 1.6372366790582404) internal successors, (5285), 3344 states have internal predecessors, (5285), 706 states have call successors, (706), 201 states have call predecessors, (706), 207 states have return successors, (842), 700 states have call predecessors, (842), 701 states have call successors, (842) [2021-11-12 22:54:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 6833 transitions. [2021-11-12 22:54:09,791 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 6833 transitions. Word has length 129 [2021-11-12 22:54:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 4142 states and 6833 transitions. [2021-11-12 22:54:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 6833 transitions. [2021-11-12 22:54:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:54:09,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:09,797 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] [2021-11-12 22:54:09,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:10,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:10,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:10,201 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash -562572134, now seen corresponding path program 1 times [2021-11-12 22:54:10,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:10,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716252757] [2021-11-12 22:54:10,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:10,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:10,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:10,204 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:10,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:54:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:10,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:54:10,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:54:11,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:54:12,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:12,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716252757] [2021-11-12 22:54:12,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716252757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:12,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1906225694] [2021-11-12 22:54:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:12,177 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:12,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:12,189 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:12,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:54:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:12,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:12,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:13,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1906225694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:13,004 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:13,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:54:13,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012732024] [2021-11-12 22:54:13,004 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:13,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:13,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:13,006 INFO L87 Difference]: Start difference. First operand 4142 states and 6833 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:13,352 INFO L93 Difference]: Finished difference Result 12330 states and 20573 transitions. [2021-11-12 22:54:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 130 [2021-11-12 22:54:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:13,426 INFO L225 Difference]: With dead ends: 12330 [2021-11-12 22:54:13,426 INFO L226 Difference]: Without dead ends: 8233 [2021-11-12 22:54:13,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:13,448 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 869 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:13,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 1857 Invalid, 10 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 39.63ms Time] [2021-11-12 22:54:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-11-12 22:54:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 8229. [2021-11-12 22:54:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 6415 states have (on average 1.6391270459859704) internal successors, (10515), 6643 states have internal predecessors, (10515), 1402 states have call successors, (1402), 397 states have call predecessors, (1402), 411 states have return successors, (1810), 1396 states have call predecessors, (1810), 1397 states have call successors, (1810) [2021-11-12 22:54:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 13727 transitions. [2021-11-12 22:54:14,017 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 13727 transitions. Word has length 130 [2021-11-12 22:54:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:14,018 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 13727 transitions. [2021-11-12 22:54:14,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 13727 transitions. [2021-11-12 22:54:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:54:14,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:14,025 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] [2021-11-12 22:54:14,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:14,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:14,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:14,448 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:14,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:14,448 INFO L85 PathProgramCache]: Analyzing trace with hash -260001211, now seen corresponding path program 1 times [2021-11-12 22:54:14,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:14,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142689563] [2021-11-12 22:54:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:14,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:14,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:14,451 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:14,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:54:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:14,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:54:14,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:54:15,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:54:16,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:16,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142689563] [2021-11-12 22:54:16,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142689563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:16,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916586060] [2021-11-12 22:54:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:16,521 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:16,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:16,523 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:16,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:54:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:16,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:16,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:17,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:17,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [916586060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:17,356 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:17,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:54:17,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529036153] [2021-11-12 22:54:17,356 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:17,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:17,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:17,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:17,358 INFO L87 Difference]: Start difference. First operand 8229 states and 13727 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:18,006 INFO L93 Difference]: Finished difference Result 24593 states and 41666 transitions. [2021-11-12 22:54:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2021-11-12 22:54:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:18,209 INFO L225 Difference]: With dead ends: 24593 [2021-11-12 22:54:18,210 INFO L226 Difference]: Without dead ends: 16409 [2021-11-12 22:54:18,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:18,245 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 868 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.74ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:18,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 1854 Invalid, 10 Unknown, 0 Unchecked, 4.74ms Time], IncrementalHoareTripleChecker [6 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 36.79ms Time] [2021-11-12 22:54:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16409 states. [2021-11-12 22:54:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16409 to 16404. [2021-11-12 22:54:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16404 states, 12790 states have (on average 1.63948397185301) internal successors, (20969), 13242 states have internal predecessors, (20969), 2794 states have call successors, (2794), 789 states have call predecessors, (2794), 819 states have return successors, (4022), 2788 states have call predecessors, (4022), 2789 states have call successors, (4022) [2021-11-12 22:54:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16404 states to 16404 states and 27785 transitions. [2021-11-12 22:54:19,254 INFO L78 Accepts]: Start accepts. Automaton has 16404 states and 27785 transitions. Word has length 131 [2021-11-12 22:54:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:19,255 INFO L470 AbstractCegarLoop]: Abstraction has 16404 states and 27785 transitions. [2021-11-12 22:54:19,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 16404 states and 27785 transitions. [2021-11-12 22:54:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 22:54:19,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:19,261 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] [2021-11-12 22:54:19,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:19,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:19,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:19,675 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash 529766716, now seen corresponding path program 1 times [2021-11-12 22:54:19,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:19,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103605654] [2021-11-12 22:54:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:19,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:19,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:19,679 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:19,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:54:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:54:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:54:20,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:54:21,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:21,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103605654] [2021-11-12 22:54:21,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103605654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:21,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1539388752] [2021-11-12 22:54:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:21,710 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:21,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:21,711 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:21,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:54:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:22,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:54:22,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1539388752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:22,524 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:22,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:54:22,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865340940] [2021-11-12 22:54:22,525 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:22,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:22,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:22,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:22,526 INFO L87 Difference]: Start difference. First operand 16404 states and 27785 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:23,436 INFO L93 Difference]: Finished difference Result 49120 states and 85306 transitions. [2021-11-12 22:54:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 132 [2021-11-12 22:54:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:23,850 INFO L225 Difference]: With dead ends: 49120 [2021-11-12 22:54:23,850 INFO L226 Difference]: Without dead ends: 32753 [2021-11-12 22:54:23,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:54:23,912 INFO L933 BasicCegarLoop]: 1072 mSDtfsCounter, 866 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.59ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:23,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 1912 Invalid, 8 Unknown, 0 Unchecked, 4.59ms Time], IncrementalHoareTripleChecker [5 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 30.67ms Time] [2021-11-12 22:54:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32753 states. [2021-11-12 22:54:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32753 to 32747. [2021-11-12 22:54:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32747 states, 25534 states have (on average 1.6388344951828935) internal successors, (41846), 26434 states have internal predecessors, (41846), 5578 states have call successors, (5578), 1573 states have call predecessors, (5578), 1634 states have return successors, (9417), 5571 states have call predecessors, (9417), 5573 states have call successors, (9417) [2021-11-12 22:54:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32747 states to 32747 states and 56841 transitions. [2021-11-12 22:54:25,873 INFO L78 Accepts]: Start accepts. Automaton has 32747 states and 56841 transitions. Word has length 132 [2021-11-12 22:54:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:25,876 INFO L470 AbstractCegarLoop]: Abstraction has 32747 states and 56841 transitions. [2021-11-12 22:54:25,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-12 22:54:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 32747 states and 56841 transitions. [2021-11-12 22:54:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:54:25,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:25,904 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:25,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:26,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:26,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:26,316 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:26,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1162448515, now seen corresponding path program 1 times [2021-11-12 22:54:26,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:26,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358424696] [2021-11-12 22:54:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:26,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:26,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:26,319 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:26,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:54:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:26,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:54:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:54:27,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:54:28,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:28,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358424696] [2021-11-12 22:54:28,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358424696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:28,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:28,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-12 22:54:28,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812813198] [2021-11-12 22:54:28,361 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:28,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:54:28,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:54:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:54:28,362 INFO L87 Difference]: Start difference. First operand 32747 states and 56841 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 22:54:30,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:32,400 WARN L515 Checker$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 22:54:34,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:36,411 WARN L515 Checker$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 22:54:38,418 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 22:55:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:01,459 INFO L93 Difference]: Finished difference Result 158055 states and 313380 transitions. [2021-11-12 22:55:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-12 22:55:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) Word has length 194 [2021-11-12 22:55:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:03,504 INFO L225 Difference]: With dead ends: 158055 [2021-11-12 22:55:03,504 INFO L226 Difference]: Without dead ends: 125353 [2021-11-12 22:55:03,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:55:03,836 INFO L933 BasicCegarLoop]: 1858 mSDtfsCounter, 7681 mSDsluCounter, 6140 mSDsCounter, 0 mSdLazyCounter, 12854 mSolverCounterSat, 3123 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24372.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7724 SdHoareTripleChecker+Valid, 7998 SdHoareTripleChecker+Invalid, 15982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 98.15ms SdHoareTripleChecker+Time, 3123 IncrementalHoareTripleChecker+Valid, 12854 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26396.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:03,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7724 Valid, 7998 Invalid, 15982 Unknown, 0 Unchecked, 98.15ms Time], IncrementalHoareTripleChecker [3123 Valid, 12854 Invalid, 5 Unknown, 0 Unchecked, 26396.86ms Time] [2021-11-12 22:55:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125353 states. [2021-11-12 22:55:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125353 to 110099. [2021-11-12 22:55:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110099 states, 83715 states have (on average 1.6219912799378844) internal successors, (135785), 87173 states have internal predecessors, (135785), 20876 states have call successors, (20876), 4710 states have call predecessors, (20876), 5507 states have return successors, (50026), 21351 states have call predecessors, (50026), 20871 states have call successors, (50026) [2021-11-12 22:55:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110099 states to 110099 states and 206687 transitions. [2021-11-12 22:55:12,544 INFO L78 Accepts]: Start accepts. Automaton has 110099 states and 206687 transitions. Word has length 194 [2021-11-12 22:55:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:12,545 INFO L470 AbstractCegarLoop]: Abstraction has 110099 states and 206687 transitions. [2021-11-12 22:55:12,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 12 states have internal predecessors, (147), 6 states have call successors, (30), 4 states have call predecessors, (30), 8 states have return successors, (29), 10 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 22:55:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 110099 states and 206687 transitions. [2021-11-12 22:55:12,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-12 22:55:12,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:12,668 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:12,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-12 22:55:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:12,883 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 941343279, now seen corresponding path program 1 times [2021-11-12 22:55:12,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:12,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354663853] [2021-11-12 22:55:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:12,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:12,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:12,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:12,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:55:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:13,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:55:13,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:55:14,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:14,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354663853] [2021-11-12 22:55:14,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354663853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:14,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:14,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:55:14,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583944864] [2021-11-12 22:55:14,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:14,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:55:14,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:14,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:55:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:55:14,750 INFO L87 Difference]: Start difference. First operand 110099 states and 206687 transitions. Second operand has 10 states, 9 states have (on average 25.88888888888889) internal successors, (233), 9 states have internal predecessors, (233), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-12 22:55:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:17,650 INFO L93 Difference]: Finished difference Result 142489 states and 262911 transitions. [2021-11-12 22:55:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:55:17,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 25.88888888888889) internal successors, (233), 9 states have internal predecessors, (233), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 201 [2021-11-12 22:55:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:17,939 INFO L225 Difference]: With dead ends: 142489 [2021-11-12 22:55:17,939 INFO L226 Difference]: Without dead ends: 32424 [2021-11-12 22:55:18,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:55:18,694 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 36 mSDsluCounter, 5163 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6029 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.79ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:18,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 6029 Invalid, 70 Unknown, 0 Unchecked, 5.79ms Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 74.49ms Time] [2021-11-12 22:55:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32424 states. [2021-11-12 22:55:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32424 to 32424. [2021-11-12 22:55:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32424 states, 25339 states have (on average 1.6385413789020877) internal successors, (41519), 26239 states have internal predecessors, (41519), 5450 states have call successors, (5450), 1573 states have call predecessors, (5450), 1634 states have return successors, (9289), 5443 states have call predecessors, (9289), 5445 states have call successors, (9289) [2021-11-12 22:55:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32424 states to 32424 states and 56258 transitions. [2021-11-12 22:55:20,793 INFO L78 Accepts]: Start accepts. Automaton has 32424 states and 56258 transitions. Word has length 201 [2021-11-12 22:55:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:20,793 INFO L470 AbstractCegarLoop]: Abstraction has 32424 states and 56258 transitions. [2021-11-12 22:55:20,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 25.88888888888889) internal successors, (233), 9 states have internal predecessors, (233), 3 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-12 22:55:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 32424 states and 56258 transitions. [2021-11-12 22:55:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-12 22:55:20,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:20,808 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:20,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:21,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:21,023 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1245670720, now seen corresponding path program 1 times [2021-11-12 22:55:21,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:21,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418067191] [2021-11-12 22:55:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:21,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:21,025 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:21,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:55:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:21,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:55:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 22:55:22,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 22:55:23,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:23,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418067191] [2021-11-12 22:55:23,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418067191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:23,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:23,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-12 22:55:23,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940247735] [2021-11-12 22:55:23,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:23,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:23,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:23,211 INFO L87 Difference]: Start difference. First operand 32424 states and 56258 transitions. Second operand has 13 states, 13 states have (on average 11.846153846153847) internal successors, (154), 11 states have internal predecessors, (154), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-12 22:55:25,232 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 22:55:27,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:29,247 WARN L515 Checker$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 22:55:31,254 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 22:55:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:35,707 INFO L93 Difference]: Finished difference Result 65254 states and 115840 transitions. [2021-11-12 22:55:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.846153846153847) internal successors, (154), 11 states have internal predecessors, (154), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) Word has length 202 [2021-11-12 22:55:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:35,882 INFO L225 Difference]: With dead ends: 65254 [2021-11-12 22:55:35,882 INFO L226 Difference]: Without dead ends: 32872 [2021-11-12 22:55:36,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:55:36,002 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 1355 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 377 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10541.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.63ms SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10942.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:36,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 1885 Invalid, 2893 Unknown, 0 Unchecked, 21.63ms Time], IncrementalHoareTripleChecker [377 Valid, 2512 Invalid, 4 Unknown, 0 Unchecked, 10942.31ms Time] [2021-11-12 22:55:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32872 states. [2021-11-12 22:55:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32872 to 32680. [2021-11-12 22:55:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32680 states, 25531 states have (on average 1.6337393756609613) internal successors, (41711), 26431 states have internal predecessors, (41711), 5450 states have call successors, (5450), 1573 states have call predecessors, (5450), 1698 states have return successors, (9609), 5507 states have call predecessors, (9609), 5445 states have call successors, (9609) [2021-11-12 22:55:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32680 states to 32680 states and 56770 transitions. [2021-11-12 22:55:37,578 INFO L78 Accepts]: Start accepts. Automaton has 32680 states and 56770 transitions. Word has length 202 [2021-11-12 22:55:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:37,579 INFO L470 AbstractCegarLoop]: Abstraction has 32680 states and 56770 transitions. [2021-11-12 22:55:37,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.846153846153847) internal successors, (154), 11 states have internal predecessors, (154), 6 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-12 22:55:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 32680 states and 56770 transitions. [2021-11-12 22:55:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-12 22:55:37,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:37,597 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:37,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:37,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,800 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash -553219710, now seen corresponding path program 1 times [2021-11-12 22:55:37,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:37,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643956147] [2021-11-12 22:55:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:37,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:37,801 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:37,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:55:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:55:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 22:55:39,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 22:55:40,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:40,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643956147] [2021-11-12 22:55:40,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643956147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:40,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:40,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:55:40,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16695368] [2021-11-12 22:55:40,304 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:40,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:55:40,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:55:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:55:40,306 INFO L87 Difference]: Start difference. First operand 32680 states and 56770 transitions. Second operand has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) [2021-11-12 22:55:42,337 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 22:55:44,345 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:46,351 WARN L515 Checker$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 22:55:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:58,635 INFO L93 Difference]: Finished difference Result 118145 states and 214276 transitions. [2021-11-12 22:55:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:55:58,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) Word has length 203 [2021-11-12 22:55:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:59,225 INFO L225 Difference]: With dead ends: 118145 [2021-11-12 22:55:59,226 INFO L226 Difference]: Without dead ends: 85443 [2021-11-12 22:55:59,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:55:59,429 INFO L933 BasicCegarLoop]: 1400 mSDtfsCounter, 3593 mSDsluCounter, 2123 mSDsCounter, 0 mSdLazyCounter, 5634 mSolverCounterSat, 947 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12954.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3738 SdHoareTripleChecker+Valid, 3523 SdHoareTripleChecker+Invalid, 6584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.82ms SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 5634 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13986.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:59,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3738 Valid, 3523 Invalid, 6584 Unknown, 0 Unchecked, 53.82ms Time], IncrementalHoareTripleChecker [947 Valid, 5634 Invalid, 3 Unknown, 0 Unchecked, 13986.49ms Time] [2021-11-12 22:55:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85443 states. [2021-11-12 22:56:03,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85443 to 84937. [2021-11-12 22:56:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84937 states, 66300 states have (on average 1.596003016591252) internal successors, (105815), 68543 states have internal predecessors, (105815), 13930 states have call successors, (13930), 4421 states have call predecessors, (13930), 4706 states have return successors, (30074), 13892 states have call predecessors, (30074), 13925 states have call successors, (30074) [2021-11-12 22:56:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84937 states to 84937 states and 149819 transitions. [2021-11-12 22:56:05,066 INFO L78 Accepts]: Start accepts. Automaton has 84937 states and 149819 transitions. Word has length 203 [2021-11-12 22:56:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:05,067 INFO L470 AbstractCegarLoop]: Abstraction has 84937 states and 149819 transitions. [2021-11-12 22:56:05,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 8 states have call successors, (47), 6 states have call predecessors, (47), 7 states have return successors, (47), 8 states have call predecessors, (47), 7 states have call successors, (47) [2021-11-12 22:56:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand 84937 states and 149819 transitions. [2021-11-12 22:56:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-12 22:56:05,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:05,085 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:05,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-12 22:56:05,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:05,304 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:05,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1315511162, now seen corresponding path program 1 times [2021-11-12 22:56:05,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:05,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794013893] [2021-11-12 22:56:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:05,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:05,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:05,306 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:05,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68bd845e-a773-4fae-b2d9-7e3af145a755/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:56:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:05,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:56:09,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:56:15,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:15,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794013893] [2021-11-12 22:56:15,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794013893] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:15,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:15,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2021-11-12 22:56:15,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144015023] [2021-11-12 22:56:15,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:15,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:56:15,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:15,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:56:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:15,570 INFO L87 Difference]: Start difference. First operand 84937 states and 149819 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 22:56:17,592 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:19,598 WARN L515 Checker$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 22:56:21,603 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 22:57:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:14,104 INFO L93 Difference]: Finished difference Result 290426 states and 529660 transitions. [2021-11-12 22:57:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:57:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 205 [2021-11-12 22:57:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:16,756 INFO L225 Difference]: With dead ends: 290426 [2021-11-12 22:57:16,756 INFO L226 Difference]: Without dead ends: 205531 [2021-11-12 22:57:17,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:57:17,212 INFO L933 BasicCegarLoop]: 1816 mSDtfsCounter, 3683 mSDsluCounter, 2467 mSDsCounter, 0 mSdLazyCounter, 2907 mSolverCounterSat, 688 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37580.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3784 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 3598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.92ms SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 2907 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44980.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:17,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3784 Valid, 4283 Invalid, 3598 Unknown, 0 Unchecked, 42.92ms Time], IncrementalHoareTripleChecker [688 Valid, 2907 Invalid, 3 Unknown, 0 Unchecked, 44980.32ms Time] [2021-11-12 22:57:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205531 states.