./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.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_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/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_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/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_958ce290-ae37-42be-ae5d-d12f5c176190/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 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:51:45,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:51:45,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:51:45,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:51:45,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:51:45,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:51:45,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:51:45,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:51:45,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:51:45,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:51:45,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:51:45,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:51:45,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:51:45,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:51:45,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:51:45,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:51:45,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:51:45,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:51:45,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:51:45,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:51:45,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:51:45,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:51:45,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:51:45,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:51:45,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:51:45,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:51:45,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:51:45,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:51:45,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:51:45,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:51:45,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:51:45,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:51:45,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:51:45,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:51:45,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:51:45,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:51:45,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:51:45,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:51:45,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:51:45,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:51:45,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:51:45,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:51:45,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:51:45,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:51:45,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:51:45,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:51:45,121 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:51:45,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:51:45,121 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:51:45,122 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:51:45,122 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:51:45,122 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:51:45,123 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:51:45,123 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:51:45,123 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:51:45,123 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:51:45,124 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:51:45,124 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:51:45,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:51:45,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:51:45,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:51:45,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:51:45,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:51:45,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:51:45,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:51:45,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:51:45,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:51:45,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:51:45,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:51:45,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:51:45,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:51:45,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:51:45,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:51:45,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:45,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:51:45,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:51:45,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:51:45,136 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:51:45,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:51:45,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:51:45,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:51:45,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:51:45,138 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_958ce290-ae37-42be-ae5d-d12f5c176190/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 [2021-11-12 23:51:45,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:51:45,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:51:45,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:51:45,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:51:45,484 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:51:45,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-12 23:51:45,563 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data/051ea2a10/852476022a634ba2adbb4c7f2b18515a/FLAG3e4339d98 [2021-11-12 23:51:46,257 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:51:46,259 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-12 23:51:46,294 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data/051ea2a10/852476022a634ba2adbb4c7f2b18515a/FLAG3e4339d98 [2021-11-12 23:51:46,477 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data/051ea2a10/852476022a634ba2adbb4c7f2b18515a [2021-11-12 23:51:46,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:51:46,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:51:46,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:46,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:51:46,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:51:46,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:46" (1/1) ... [2021-11-12 23:51:46,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e7422c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:46, skipping insertion in model container [2021-11-12 23:51:46,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:46" (1/1) ... [2021-11-12 23:51:46,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:51:46,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:47,182 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_958ce290-ae37-42be-ae5d-d12f5c176190/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-12 23:51:47,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:47,211 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:51:47,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ccdd12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:47, skipping insertion in model container [2021-11-12 23:51:47,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:47,213 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:51:47,216 INFO L158 Benchmark]: Toolchain (without parser) took 732.80ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 56.7MB in the end (delta: 18.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:51:47,217 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory is still 72.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:51:47,219 INFO L158 Benchmark]: CACSL2BoogieTranslator took 729.95ms. Allocated memory is still 98.6MB. Free memory was 74.9MB in the beginning and 56.7MB in the end (delta: 18.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:51:47,222 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory is still 72.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 729.95ms. Allocated memory is still 98.6MB. Free memory was 74.9MB in the beginning and 56.7MB in the end (delta: 18.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3167]: 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_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/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_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/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_958ce290-ae37-42be-ae5d-d12f5c176190/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 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:51:49,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:51:49,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:51:49,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:51:49,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:51:49,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:51:49,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:51:49,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:51:49,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:51:49,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:51:49,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:51:49,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:51:49,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:51:49,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:51:49,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:51:49,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:51:49,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:51:49,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:51:49,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:51:49,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:51:49,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:51:49,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:51:49,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:51:49,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:51:49,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:51:49,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:51:49,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:51:49,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:51:49,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:51:49,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:51:49,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:51:49,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:51:49,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:51:49,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:51:49,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:51:49,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:51:49,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:51:49,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:51:49,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:51:49,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:51:49,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:51:49,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:51:49,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:51:49,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:51:49,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:51:49,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:51:49,770 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:51:49,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:51:49,771 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:51:49,771 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:51:49,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:51:49,771 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:51:49,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:51:49,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:51:49,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:51:49,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:51:49,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:51:49,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:51:49,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:51:49,776 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:51:49,776 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:51:49,776 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:51:49,777 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:51:49,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:51:49,777 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:51:49,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:51:49,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:51:49,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:51:49,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:51:49,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:49,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:51:49,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:51:49,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:51:49,780 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:51:49,780 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:51:49,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:51:49,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:51:49,781 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:51:49,782 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_958ce290-ae37-42be-ae5d-d12f5c176190/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 [2021-11-12 23:51:50,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:51:50,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:51:50,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:51:50,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:51:50,270 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:51:50,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-12 23:51:50,351 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data/e6f233e2d/3c2133cdb6b8448daebd9fe651453864/FLAG711e99a4b [2021-11-12 23:51:51,027 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:51:51,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-12 23:51:51,050 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data/e6f233e2d/3c2133cdb6b8448daebd9fe651453864/FLAG711e99a4b [2021-11-12 23:51:51,224 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/data/e6f233e2d/3c2133cdb6b8448daebd9fe651453864 [2021-11-12 23:51:51,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:51:51,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:51:51,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:51,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:51:51,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:51:51,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:51" (1/1) ... [2021-11-12 23:51:51,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64dc06dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:51, skipping insertion in model container [2021-11-12 23:51:51,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:51" (1/1) ... [2021-11-12 23:51:51,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:51:51,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:52,067 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_958ce290-ae37-42be-ae5d-d12f5c176190/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-12 23:51:52,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:52,089 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:51:52,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:52,368 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_958ce290-ae37-42be-ae5d-d12f5c176190/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-12 23:51:52,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:52,375 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:51:52,522 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_958ce290-ae37-42be-ae5d-d12f5c176190/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-12 23:51:52,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:52,567 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:51:52,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52 WrapperNode [2021-11-12 23:51:52,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:52,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:52,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:51:52,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:51:52,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:52,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:51:52,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:51:52,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:51:52,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:51:52,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:51:52,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:51:52,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:51:52,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (1/1) ... [2021-11-12 23:51:52,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:52,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:51:52,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:51:52,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:51:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 23:51:52,965 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 23:51:52,965 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:51:52,965 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:51:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:51:52,966 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:51:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:51:52,966 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:51:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:51:52,966 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:51:52,966 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:51:52,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:51:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:51:52,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:51:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:51:52,967 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:51:52,967 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:51:52,968 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:51:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:51:52,968 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:51:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:51:52,968 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:51:52,968 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:51:52,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:51:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:51:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:51:52,969 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:51:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:51:52,969 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:51:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:51:52,970 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:51:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:51:52,971 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:51:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:51:52,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:51:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:51:52,972 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:51:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:51:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 23:51:52,973 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 23:51:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:51:52,973 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:51:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 23:51:52,973 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 23:51:52,973 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:51:52,974 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:51:52,974 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:51:52,974 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:51:52,975 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:51:52,975 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:51:52,976 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:51:52,977 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:51:52,977 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:51:52,977 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:51:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:51:52,978 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:51:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:51:52,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:51:52,978 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:51:52,978 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:51:52,979 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 23:51:52,979 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 23:51:57,551 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:51:57,551 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:51:57,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:57 BoogieIcfgContainer [2021-11-12 23:51:57,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:51:57,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:51:57,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:51:57,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:51:57,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:51:51" (1/3) ... [2021-11-12 23:51:57,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cdd9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:57, skipping insertion in model container [2021-11-12 23:51:57,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:52" (2/3) ... [2021-11-12 23:51:57,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cdd9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:57, skipping insertion in model container [2021-11-12 23:51:57,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:57" (3/3) ... [2021-11-12 23:51:57,565 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product24.cil.c [2021-11-12 23:51:57,571 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:51:57,571 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:51:57,633 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:51:57,641 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:51:57,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:51:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 620 states, 474 states have (on average 1.6582278481012658) internal successors, (786), 494 states have internal predecessors, (786), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2021-11-12 23:51:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:51:57,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:57,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:57,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1970042656, now seen corresponding path program 1 times [2021-11-12 23:51:57,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:57,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341940597] [2021-11-12 23:51:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:57,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:57,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:57,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:51:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:58,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:51:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:58,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:59,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:59,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341940597] [2021-11-12 23:51:59,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341940597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:59,387 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:59,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:51:59,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786978411] [2021-11-12 23:51:59,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:59,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:51:59,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:59,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:51:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:51:59,449 INFO L87 Difference]: Start difference. First operand has 620 states, 474 states have (on average 1.6582278481012658) internal successors, (786), 494 states have internal predecessors, (786), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:59,911 INFO L93 Difference]: Finished difference Result 1243 states and 2053 transitions. [2021-11-12 23:51:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:51:59,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-12 23:51:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:59,952 INFO L225 Difference]: With dead ends: 1243 [2021-11-12 23:51:59,952 INFO L226 Difference]: Without dead ends: 631 [2021-11-12 23:51:59,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:51:59,977 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 214 mSDsluCounter, 3979 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 4979 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.23ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:59,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 4979 Invalid, 89 Unknown, 0 Unchecked, 46.23ms Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 188.77ms Time] [2021-11-12 23:52:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-12 23:52:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 623. [2021-11-12 23:52:00,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 477 states have (on average 1.649895178197065) internal successors, (787), 497 states have internal predecessors, (787), 116 states have call successors, (116), 29 states have call predecessors, (116), 29 states have return successors, (115), 110 states have call predecessors, (115), 113 states have call successors, (115) [2021-11-12 23:52:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1018 transitions. [2021-11-12 23:52:00,186 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1018 transitions. Word has length 67 [2021-11-12 23:52:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:00,187 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1018 transitions. [2021-11-12 23:52:00,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1018 transitions. [2021-11-12 23:52:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:52:00,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:00,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:00,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:00,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:00,427 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash 262212232, now seen corresponding path program 1 times [2021-11-12 23:52:00,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:00,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124280857] [2021-11-12 23:52:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:00,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:00,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:00,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:00,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:52:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:01,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:52:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:01,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:01,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:01,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124280857] [2021-11-12 23:52:01,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124280857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:01,789 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:01,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:52:01,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744506392] [2021-11-12 23:52:01,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:01,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:52:01,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:52:01,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:52:01,796 INFO L87 Difference]: Start difference. First operand 623 states and 1018 transitions. Second operand has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:02,143 INFO L93 Difference]: Finished difference Result 1251 states and 2054 transitions. [2021-11-12 23:52:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:52:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 68 [2021-11-12 23:52:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:02,157 INFO L225 Difference]: With dead ends: 1251 [2021-11-12 23:52:02,157 INFO L226 Difference]: Without dead ends: 644 [2021-11-12 23:52:02,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 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 23:52:02,164 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 186 mSDsluCounter, 4971 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 182.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 5972 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.61ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 209.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:02,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 5972 Invalid, 109 Unknown, 0 Unchecked, 19.61ms Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 209.33ms Time] [2021-11-12 23:52:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-12 23:52:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 636. [2021-11-12 23:52:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 487 states have (on average 1.646817248459959) internal successors, (802), 509 states have internal predecessors, (802), 117 states have call successors, (117), 29 states have call predecessors, (117), 31 states have return successors, (118), 111 states have call predecessors, (118), 114 states have call successors, (118) [2021-11-12 23:52:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1037 transitions. [2021-11-12 23:52:02,248 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1037 transitions. Word has length 68 [2021-11-12 23:52:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:02,249 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1037 transitions. [2021-11-12 23:52:02,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1037 transitions. [2021-11-12 23:52:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:52:02,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:02,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:02,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:02,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:02,477 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:02,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2105216956, now seen corresponding path program 1 times [2021-11-12 23:52:02,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:02,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150571476] [2021-11-12 23:52:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:02,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:02,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:02,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:52:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:03,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:52:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:03,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:03,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:03,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150571476] [2021-11-12 23:52:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150571476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:03,781 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:03,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:52:03,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083344755] [2021-11-12 23:52:03,782 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:03,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:52:03,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:52:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:52:03,785 INFO L87 Difference]: Start difference. First operand 636 states and 1037 transitions. Second operand has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:04,170 INFO L93 Difference]: Finished difference Result 1277 states and 2093 transitions. [2021-11-12 23:52:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:52:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2021-11-12 23:52:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:04,179 INFO L225 Difference]: With dead ends: 1277 [2021-11-12 23:52:04,179 INFO L226 Difference]: Without dead ends: 657 [2021-11-12 23:52:04,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 127 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 23:52:04,186 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 173 mSDsluCounter, 7863 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 252.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 8862 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.70ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 283.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:04,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 8862 Invalid, 145 Unknown, 0 Unchecked, 20.70ms Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 283.15ms Time] [2021-11-12 23:52:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-12 23:52:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 649. [2021-11-12 23:52:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 497 states have (on average 1.6438631790744467) internal successors, (817), 521 states have internal predecessors, (817), 118 states have call successors, (118), 29 states have call predecessors, (118), 33 states have return successors, (121), 112 states have call predecessors, (121), 115 states have call successors, (121) [2021-11-12 23:52:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1056 transitions. [2021-11-12 23:52:04,231 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1056 transitions. Word has length 69 [2021-11-12 23:52:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:04,232 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1056 transitions. [2021-11-12 23:52:04,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1056 transitions. [2021-11-12 23:52:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:52:04,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:04,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:04,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:04,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:04,452 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:04,453 INFO L85 PathProgramCache]: Analyzing trace with hash 849595948, now seen corresponding path program 1 times [2021-11-12 23:52:04,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:04,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121774053] [2021-11-12 23:52:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:04,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:04,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:04,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:04,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:52:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:52:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:05,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:05,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:05,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121774053] [2021-11-12 23:52:05,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121774053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:05,682 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:05,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:52:05,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047169475] [2021-11-12 23:52:05,682 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:05,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:52:05,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:52:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:52:05,684 INFO L87 Difference]: Start difference. First operand 649 states and 1056 transitions. Second operand has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:05,969 INFO L93 Difference]: Finished difference Result 1299 states and 2126 transitions. [2021-11-12 23:52:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:52:05,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 70 [2021-11-12 23:52:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:05,978 INFO L225 Difference]: With dead ends: 1299 [2021-11-12 23:52:05,978 INFO L226 Difference]: Without dead ends: 666 [2021-11-12 23:52:05,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 129 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 23:52:05,984 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 103 mSDsluCounter, 5801 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 6802 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.38ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:05,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 6802 Invalid, 104 Unknown, 0 Unchecked, 20.38ms Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 177.78ms Time] [2021-11-12 23:52:05,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-11-12 23:52:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 662. [2021-11-12 23:52:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 507 states have (on average 1.641025641025641) internal successors, (832), 533 states have internal predecessors, (832), 119 states have call successors, (119), 29 states have call predecessors, (119), 35 states have return successors, (124), 113 states have call predecessors, (124), 116 states have call successors, (124) [2021-11-12 23:52:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1075 transitions. [2021-11-12 23:52:06,028 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1075 transitions. Word has length 70 [2021-11-12 23:52:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:06,028 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1075 transitions. [2021-11-12 23:52:06,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1075 transitions. [2021-11-12 23:52:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:52:06,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:06,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:06,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:06,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:06,248 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1744485741, now seen corresponding path program 1 times [2021-11-12 23:52:06,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:06,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896657564] [2021-11-12 23:52:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:06,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:06,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:06,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:52:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:06,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:52:06,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:07,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:07,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:07,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896657564] [2021-11-12 23:52:07,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896657564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:07,446 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:07,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:52:07,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433864890] [2021-11-12 23:52:07,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:07,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:52:07,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:07,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:52:07,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:52:07,448 INFO L87 Difference]: Start difference. First operand 662 states and 1075 transitions. Second operand has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:52:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:07,652 INFO L93 Difference]: Finished difference Result 1319 states and 2156 transitions. [2021-11-12 23:52:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:52:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-12 23:52:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:07,661 INFO L225 Difference]: With dead ends: 1319 [2021-11-12 23:52:07,661 INFO L226 Difference]: Without dead ends: 673 [2021-11-12 23:52:07,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 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 23:52:07,668 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 242 mSDsluCounter, 3897 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 4886 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.61ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:07,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 4886 Invalid, 77 Unknown, 0 Unchecked, 11.61ms Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 128.08ms Time] [2021-11-12 23:52:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-12 23:52:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 671. [2021-11-12 23:52:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 515 states have (on average 1.6407766990291262) internal successors, (845), 542 states have internal predecessors, (845), 119 states have call successors, (119), 29 states have call predecessors, (119), 36 states have return successors, (128), 113 states have call predecessors, (128), 116 states have call successors, (128) [2021-11-12 23:52:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1092 transitions. [2021-11-12 23:52:07,713 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1092 transitions. Word has length 70 [2021-11-12 23:52:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:07,714 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1092 transitions. [2021-11-12 23:52:07,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:52:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1092 transitions. [2021-11-12 23:52:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:52:07,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:07,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:07,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:07,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:07,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1772077202, now seen corresponding path program 1 times [2021-11-12 23:52:07,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:07,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916059052] [2021-11-12 23:52:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:07,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:07,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:07,940 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:07,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:52:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:08,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:08,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:08,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:08,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916059052] [2021-11-12 23:52:08,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916059052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:08,851 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:08,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:52:08,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140465864] [2021-11-12 23:52:08,852 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:08,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:52:08,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:08,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:52:08,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:52:08,853 INFO L87 Difference]: Start difference. First operand 671 states and 1092 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:52:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:08,937 INFO L93 Difference]: Finished difference Result 1318 states and 2149 transitions. [2021-11-12 23:52:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:52:08,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 71 [2021-11-12 23:52:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:08,944 INFO L225 Difference]: With dead ends: 1318 [2021-11-12 23:52:08,945 INFO L226 Difference]: Without dead ends: 581 [2021-11-12 23:52:08,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:52:08,951 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 35 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:08,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1971 Invalid, 17 Unknown, 0 Unchecked, 4.91ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 25.54ms Time] [2021-11-12 23:52:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-12 23:52:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-12 23:52:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 438 states have (on average 1.6164383561643836) internal successors, (708), 456 states have internal predecessors, (708), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-12 23:52:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 935 transitions. [2021-11-12 23:52:08,983 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 935 transitions. Word has length 71 [2021-11-12 23:52:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:08,983 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 935 transitions. [2021-11-12 23:52:08,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:52:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 935 transitions. [2021-11-12 23:52:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:52:08,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:08,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:09,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:09,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:09,200 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1290189160, now seen corresponding path program 1 times [2021-11-12 23:52:09,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:09,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868301857] [2021-11-12 23:52:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:09,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:09,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:09,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:09,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:52:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:52:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:10,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:10,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:10,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868301857] [2021-11-12 23:52:10,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868301857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:10,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:10,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:52:10,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020011637] [2021-11-12 23:52:10,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:10,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:52:10,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:52:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:10,503 INFO L87 Difference]: Start difference. First operand 581 states and 935 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:10,751 INFO L93 Difference]: Finished difference Result 1149 states and 1858 transitions. [2021-11-12 23:52:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2021-11-12 23:52:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:10,761 INFO L225 Difference]: With dead ends: 1149 [2021-11-12 23:52:10,761 INFO L226 Difference]: Without dead ends: 581 [2021-11-12 23:52:10,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:52:10,769 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 68 mSDsluCounter, 6390 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 7307 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.68ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:10,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 7307 Invalid, 121 Unknown, 0 Unchecked, 13.68ms Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 145.05ms Time] [2021-11-12 23:52:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-12 23:52:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-12 23:52:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 438 states have (on average 1.6141552511415524) internal successors, (707), 456 states have internal predecessors, (707), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-12 23:52:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 934 transitions. [2021-11-12 23:52:10,806 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 934 transitions. Word has length 71 [2021-11-12 23:52:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:10,807 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 934 transitions. [2021-11-12 23:52:10,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 934 transitions. [2021-11-12 23:52:10,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:52:10,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:10,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:10,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:11,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:11,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 774241932, now seen corresponding path program 1 times [2021-11-12 23:52:11,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:11,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945050376] [2021-11-12 23:52:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:11,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:11,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:11,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:52:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:52:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:11,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:12,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:12,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945050376] [2021-11-12 23:52:12,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945050376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:12,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:12,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:52:12,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056043524] [2021-11-12 23:52:12,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:12,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:52:12,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:52:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:12,331 INFO L87 Difference]: Start difference. First operand 581 states and 934 transitions. Second operand has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:12,609 INFO L93 Difference]: Finished difference Result 1149 states and 1856 transitions. [2021-11-12 23:52:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:12,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2021-11-12 23:52:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:12,618 INFO L225 Difference]: With dead ends: 1149 [2021-11-12 23:52:12,618 INFO L226 Difference]: Without dead ends: 581 [2021-11-12 23:52:12,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:52:12,626 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 76 mSDsluCounter, 6405 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 7322 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:12,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 7322 Invalid, 129 Unknown, 0 Unchecked, 13.46ms Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 170.22ms Time] [2021-11-12 23:52:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-12 23:52:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-12 23:52:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 438 states have (on average 1.6118721461187215) internal successors, (706), 456 states have internal predecessors, (706), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-12 23:52:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 933 transitions. [2021-11-12 23:52:12,684 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 933 transitions. Word has length 72 [2021-11-12 23:52:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:12,684 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 933 transitions. [2021-11-12 23:52:12,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 933 transitions. [2021-11-12 23:52:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:52:12,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:12,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:12,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:12,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:12,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1641296429, now seen corresponding path program 1 times [2021-11-12 23:52:12,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:12,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861160721] [2021-11-12 23:52:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:12,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:12,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:12,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:12,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:52:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:52:13,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:13,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:14,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:14,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861160721] [2021-11-12 23:52:14,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861160721] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:14,162 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:14,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:52:14,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463781361] [2021-11-12 23:52:14,162 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:14,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:52:14,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:52:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:14,165 INFO L87 Difference]: Start difference. First operand 581 states and 933 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:14,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:14,390 INFO L93 Difference]: Finished difference Result 1149 states and 1854 transitions. [2021-11-12 23:52:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-12 23:52:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:14,397 INFO L225 Difference]: With dead ends: 1149 [2021-11-12 23:52:14,397 INFO L226 Difference]: Without dead ends: 581 [2021-11-12 23:52:14,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:52:14,402 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 35 mSDsluCounter, 8207 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 9124 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:14,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 9124 Invalid, 126 Unknown, 0 Unchecked, 27.74ms Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 125.92ms Time] [2021-11-12 23:52:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-12 23:52:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-12 23:52:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 438 states have (on average 1.6095890410958904) internal successors, (705), 456 states have internal predecessors, (705), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-12 23:52:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 932 transitions. [2021-11-12 23:52:14,429 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 932 transitions. Word has length 73 [2021-11-12 23:52:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:14,429 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 932 transitions. [2021-11-12 23:52:14,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 932 transitions. [2021-11-12 23:52:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:52:14,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:14,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:14,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:14,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:14,649 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1863235855, now seen corresponding path program 1 times [2021-11-12 23:52:14,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:14,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783372095] [2021-11-12 23:52:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:14,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:14,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:14,651 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:14,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:52:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:15,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:52:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:15,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:15,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:15,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783372095] [2021-11-12 23:52:15,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783372095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:15,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:15,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:52:15,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356243680] [2021-11-12 23:52:15,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:15,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:52:15,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:52:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:15,844 INFO L87 Difference]: Start difference. First operand 581 states and 932 transitions. Second operand has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:16,057 INFO L93 Difference]: Finished difference Result 1149 states and 1852 transitions. [2021-11-12 23:52:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 74 [2021-11-12 23:52:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:16,065 INFO L225 Difference]: With dead ends: 1149 [2021-11-12 23:52:16,065 INFO L226 Difference]: Without dead ends: 581 [2021-11-12 23:52:16,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 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 23:52:16,070 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 41 mSDsluCounter, 6376 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 7293 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:16,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 7293 Invalid, 91 Unknown, 0 Unchecked, 11.36ms Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 129.26ms Time] [2021-11-12 23:52:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-12 23:52:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-12 23:52:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 438 states have (on average 1.6073059360730593) internal successors, (704), 456 states have internal predecessors, (704), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-12 23:52:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 931 transitions. [2021-11-12 23:52:16,098 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 931 transitions. Word has length 74 [2021-11-12 23:52:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:16,098 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 931 transitions. [2021-11-12 23:52:16,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:52:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 931 transitions. [2021-11-12 23:52:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:52:16,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:16,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:16,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:16,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:16,322 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:16,323 INFO L85 PathProgramCache]: Analyzing trace with hash 846962418, now seen corresponding path program 1 times [2021-11-12 23:52:16,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:16,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485030713] [2021-11-12 23:52:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:16,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:16,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:16,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:16,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:52:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:52:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:17,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:17,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:17,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485030713] [2021-11-12 23:52:17,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485030713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:17,275 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:17,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:52:17,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655301751] [2021-11-12 23:52:17,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:17,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:52:17,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:17,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:52:17,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:17,276 INFO L87 Difference]: Start difference. First operand 581 states and 931 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 23:52:19,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:21,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:25,132 INFO L93 Difference]: Finished difference Result 2281 states and 3742 transitions. [2021-11-12 23:52:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:52:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 75 [2021-11-12 23:52:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:25,150 INFO L225 Difference]: With dead ends: 2281 [2021-11-12 23:52:25,151 INFO L226 Difference]: Without dead ends: 1718 [2021-11-12 23:52:25,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:52:25,158 INFO L933 BasicCegarLoop]: 1229 mSDtfsCounter, 2012 mSDsluCounter, 6699 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 172 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7048.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2037 SdHoareTripleChecker+Valid, 7928 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.17ms SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7511.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:25,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2037 Valid, 7928 Invalid, 1945 Unknown, 0 Unchecked, 43.17ms Time], IncrementalHoareTripleChecker [172 Valid, 1771 Invalid, 2 Unknown, 0 Unchecked, 7511.99ms Time] [2021-11-12 23:52:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-11-12 23:52:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1700. [2021-11-12 23:52:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1293 states have (on average 1.5870069605568446) internal successors, (2052), 1347 states have internal predecessors, (2052), 327 states have call successors, (327), 81 states have call predecessors, (327), 79 states have return successors, (346), 313 states have call predecessors, (346), 322 states have call successors, (346) [2021-11-12 23:52:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2725 transitions. [2021-11-12 23:52:25,245 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2725 transitions. Word has length 75 [2021-11-12 23:52:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:25,245 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 2725 transitions. [2021-11-12 23:52:25,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 23:52:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2725 transitions. [2021-11-12 23:52:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:52:25,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:25,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:25,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:25,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:25,468 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:25,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2055109646, now seen corresponding path program 1 times [2021-11-12 23:52:25,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:25,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382108804] [2021-11-12 23:52:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:25,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:25,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:25,470 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:25,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:52:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:25,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:26,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:26,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:26,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382108804] [2021-11-12 23:52:26,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382108804] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:52:26,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:52:26,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 23:52:26,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553373267] [2021-11-12 23:52:26,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:26,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:52:26,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:52:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:26,499 INFO L87 Difference]: Start difference. First operand 1700 states and 2725 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:52:28,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:29,552 INFO L93 Difference]: Finished difference Result 4558 states and 7443 transitions. [2021-11-12 23:52:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:52:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-11-12 23:52:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:29,591 INFO L225 Difference]: With dead ends: 4558 [2021-11-12 23:52:29,591 INFO L226 Difference]: Without dead ends: 2876 [2021-11-12 23:52:29,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:52:29,641 INFO L933 BasicCegarLoop]: 1184 mSDtfsCounter, 897 mSDsluCounter, 3941 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2748.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 5125 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.27ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2875.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:29,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 5125 Invalid, 297 Unknown, 0 Unchecked, 14.27ms Time], IncrementalHoareTripleChecker [30 Valid, 266 Invalid, 1 Unknown, 0 Unchecked, 2875.50ms Time] [2021-11-12 23:52:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-11-12 23:52:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2858. [2021-11-12 23:52:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2180 states have (on average 1.5963302752293578) internal successors, (3480), 2268 states have internal predecessors, (3480), 540 states have call successors, (540), 132 states have call predecessors, (540), 137 states have return successors, (622), 528 states have call predecessors, (622), 533 states have call successors, (622) [2021-11-12 23:52:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4642 transitions. [2021-11-12 23:52:29,807 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4642 transitions. Word has length 75 [2021-11-12 23:52:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:29,808 INFO L470 AbstractCegarLoop]: Abstraction has 2858 states and 4642 transitions. [2021-11-12 23:52:29,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:52:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4642 transitions. [2021-11-12 23:52:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:52:29,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:29,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:29,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:30,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:30,030 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash -822828035, now seen corresponding path program 1 times [2021-11-12 23:52:30,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:30,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349916051] [2021-11-12 23:52:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:30,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:30,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:30,033 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:30,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:52:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:30,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:31,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:31,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349916051] [2021-11-12 23:52:31,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349916051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:31,196 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:31,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:52:31,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432807818] [2021-11-12 23:52:31,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:31,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:31,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:31,198 INFO L87 Difference]: Start difference. First operand 2858 states and 4642 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:52:33,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:34,825 INFO L93 Difference]: Finished difference Result 8888 states and 15200 transitions. [2021-11-12 23:52:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:34,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 78 [2021-11-12 23:52:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:34,899 INFO L225 Difference]: With dead ends: 8888 [2021-11-12 23:52:34,899 INFO L226 Difference]: Without dead ends: 6048 [2021-11-12 23:52:34,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:52:34,928 INFO L933 BasicCegarLoop]: 1193 mSDtfsCounter, 1005 mSDsluCounter, 4130 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3136.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 5323 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.67ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3321.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:34,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 5323 Invalid, 463 Unknown, 0 Unchecked, 17.67ms Time], IncrementalHoareTripleChecker [52 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 3321.65ms Time] [2021-11-12 23:52:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6048 states. [2021-11-12 23:52:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6048 to 5654. [2021-11-12 23:52:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 4314 states have (on average 1.5848400556328233) internal successors, (6837), 4485 states have internal predecessors, (6837), 1050 states have call successors, (1050), 261 states have call predecessors, (1050), 289 states have return successors, (1487), 1049 states have call predecessors, (1487), 1038 states have call successors, (1487) [2021-11-12 23:52:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 9374 transitions. [2021-11-12 23:52:35,311 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 9374 transitions. Word has length 78 [2021-11-12 23:52:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:35,312 INFO L470 AbstractCegarLoop]: Abstraction has 5654 states and 9374 transitions. [2021-11-12 23:52:35,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:52:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 9374 transitions. [2021-11-12 23:52:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 23:52:35,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:35,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:35,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:35,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:35,530 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:35,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1570138946, now seen corresponding path program 1 times [2021-11-12 23:52:35,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:35,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445565273] [2021-11-12 23:52:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:35,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:35,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:35,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:35,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:52:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:36,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:36,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:36,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445565273] [2021-11-12 23:52:36,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445565273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:36,591 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:36,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:52:36,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661950588] [2021-11-12 23:52:36,591 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:36,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:52:36,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:52:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:52:36,594 INFO L87 Difference]: Start difference. First operand 5654 states and 9374 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:52:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:37,069 INFO L93 Difference]: Finished difference Result 11320 states and 19003 transitions. [2021-11-12 23:52:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:37,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 79 [2021-11-12 23:52:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:37,138 INFO L225 Difference]: With dead ends: 11320 [2021-11-12 23:52:37,138 INFO L226 Difference]: Without dead ends: 5684 [2021-11-12 23:52:37,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:52:37,189 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 19 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:37,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3596 Invalid, 100 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 156.53ms Time] [2021-11-12 23:52:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-11-12 23:52:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 5674. [2021-11-12 23:52:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5674 states, 4329 states have (on average 1.5816585816585818) internal successors, (6847), 4500 states have internal predecessors, (6847), 1050 states have call successors, (1050), 271 states have call predecessors, (1050), 294 states have return successors, (1462), 1044 states have call predecessors, (1462), 1038 states have call successors, (1462) [2021-11-12 23:52:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5674 states to 5674 states and 9359 transitions. [2021-11-12 23:52:37,681 INFO L78 Accepts]: Start accepts. Automaton has 5674 states and 9359 transitions. Word has length 79 [2021-11-12 23:52:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:37,682 INFO L470 AbstractCegarLoop]: Abstraction has 5674 states and 9359 transitions. [2021-11-12 23:52:37,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:52:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5674 states and 9359 transitions. [2021-11-12 23:52:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:52:37,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:37,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:37,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:37,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:37,909 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash -754634727, now seen corresponding path program 1 times [2021-11-12 23:52:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:37,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839478225] [2021-11-12 23:52:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:37,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:37,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:37,912 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:37,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:52:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:38,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:52:39,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:39,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839478225] [2021-11-12 23:52:39,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839478225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:39,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:39,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:52:39,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622817227] [2021-11-12 23:52:39,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:39,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:39,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:39,220 INFO L87 Difference]: Start difference. First operand 5674 states and 9359 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:52:41,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:43,256 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 23:52:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:45,611 INFO L93 Difference]: Finished difference Result 17823 states and 31675 transitions. [2021-11-12 23:52:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:45,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 87 [2021-11-12 23:52:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:45,849 INFO L225 Difference]: With dead ends: 17823 [2021-11-12 23:52:45,849 INFO L226 Difference]: Without dead ends: 12167 [2021-11-12 23:52:45,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:52:45,903 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 984 mSDsluCounter, 5033 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5577.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 6230 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.51ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5853.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:45,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 6230 Invalid, 772 Unknown, 0 Unchecked, 18.51ms Time], IncrementalHoareTripleChecker [46 Valid, 724 Invalid, 2 Unknown, 0 Unchecked, 5853.10ms Time] [2021-11-12 23:52:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12167 states. [2021-11-12 23:52:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12167 to 11347. [2021-11-12 23:52:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11347 states, 8655 states have (on average 1.573887926054304) internal successors, (13622), 9000 states have internal predecessors, (13622), 2075 states have call successors, (2075), 539 states have call predecessors, (2075), 616 states have return successors, (3653), 2091 states have call predecessors, (3653), 2053 states have call successors, (3653) [2021-11-12 23:52:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11347 states to 11347 states and 19350 transitions. [2021-11-12 23:52:46,807 INFO L78 Accepts]: Start accepts. Automaton has 11347 states and 19350 transitions. Word has length 87 [2021-11-12 23:52:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:46,808 INFO L470 AbstractCegarLoop]: Abstraction has 11347 states and 19350 transitions. [2021-11-12 23:52:46,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:52:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 11347 states and 19350 transitions. [2021-11-12 23:52:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:52:46,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:46,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:46,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:47,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:47,032 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash -268847510, now seen corresponding path program 1 times [2021-11-12 23:52:47,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:47,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924827982] [2021-11-12 23:52:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:47,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:47,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:47,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:47,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:52:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:47,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:47,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:47,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:52:48,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:48,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924827982] [2021-11-12 23:52:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924827982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:48,124 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:48,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:52:48,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942633849] [2021-11-12 23:52:48,125 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:48,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:52:48,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:52:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:52:48,126 INFO L87 Difference]: Start difference. First operand 11347 states and 19350 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:52:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:48,943 INFO L93 Difference]: Finished difference Result 22796 states and 39474 transitions. [2021-11-12 23:52:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 88 [2021-11-12 23:52:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:49,045 INFO L225 Difference]: With dead ends: 22796 [2021-11-12 23:52:49,045 INFO L226 Difference]: Without dead ends: 11467 [2021-11-12 23:52:49,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:52:49,127 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 21 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.14ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:49,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3594 Invalid, 93 Unknown, 0 Unchecked, 4.14ms Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 98.79ms Time] [2021-11-12 23:52:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-11-12 23:52:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 11447. [2021-11-12 23:52:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11447 states, 8745 states have (on average 1.5691252144082333) internal successors, (13722), 9070 states have internal predecessors, (13722), 2075 states have call successors, (2075), 579 states have call predecessors, (2075), 626 states have return successors, (3615), 2081 states have call predecessors, (3615), 2053 states have call successors, (3615) [2021-11-12 23:52:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11447 states to 11447 states and 19412 transitions. [2021-11-12 23:52:50,016 INFO L78 Accepts]: Start accepts. Automaton has 11447 states and 19412 transitions. Word has length 88 [2021-11-12 23:52:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:50,017 INFO L470 AbstractCegarLoop]: Abstraction has 11447 states and 19412 transitions. [2021-11-12 23:52:50,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:52:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 11447 states and 19412 transitions. [2021-11-12 23:52:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:52:50,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:50,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-12 23:52:50,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:50,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:50,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1198161924, now seen corresponding path program 1 times [2021-11-12 23:52:50,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:50,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320011522] [2021-11-12 23:52:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:50,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:50,238 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:50,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:52:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:50,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:52:51,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:52:51,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:51,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320011522] [2021-11-12 23:52:51,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320011522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:51,368 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:51,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:52:51,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699779120] [2021-11-12 23:52:51,368 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:51,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:51,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:51,370 INFO L87 Difference]: Start difference. First operand 11447 states and 19412 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:52:53,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:55,400 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 23:52:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:58,345 INFO L93 Difference]: Finished difference Result 35891 states and 67721 transitions. [2021-11-12 23:52:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 97 [2021-11-12 23:52:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:58,751 INFO L225 Difference]: With dead ends: 35891 [2021-11-12 23:52:58,751 INFO L226 Difference]: Without dead ends: 24462 [2021-11-12 23:52:58,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:52:58,860 INFO L933 BasicCegarLoop]: 1206 mSDtfsCounter, 961 mSDsluCounter, 5073 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5541.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 6279 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.11ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5782.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:58,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [980 Valid, 6279 Invalid, 765 Unknown, 0 Unchecked, 21.11ms Time], IncrementalHoareTripleChecker [38 Valid, 725 Invalid, 2 Unknown, 0 Unchecked, 5782.10ms Time] [2021-11-12 23:52:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24462 states. [2021-11-12 23:53:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24462 to 22978. [2021-11-12 23:53:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22978 states, 17547 states have (on average 1.56248931441272) internal successors, (27417), 18210 states have internal predecessors, (27417), 4130 states have call successors, (4130), 1155 states have call predecessors, (4130), 1300 states have return successors, (9364), 4180 states have call predecessors, (9364), 4088 states have call successors, (9364) [2021-11-12 23:53:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 40911 transitions. [2021-11-12 23:53:00,869 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 40911 transitions. Word has length 97 [2021-11-12 23:53:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:00,869 INFO L470 AbstractCegarLoop]: Abstraction has 22978 states and 40911 transitions. [2021-11-12 23:53:00,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:53:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 40911 transitions. [2021-11-12 23:53:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:53:00,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:00,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 23:53:00,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:01,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:01,096 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:01,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1945989841, now seen corresponding path program 1 times [2021-11-12 23:53:01,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:01,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327160232] [2021-11-12 23:53:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:01,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:01,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:01,099 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:53:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:01,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:53:01,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:53:02,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:53:02,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:02,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327160232] [2021-11-12 23:53:02,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327160232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:02,468 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:02,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:53:02,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199250135] [2021-11-12 23:53:02,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:02,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:53:02,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:53:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:53:02,471 INFO L87 Difference]: Start difference. First operand 22978 states and 40911 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:53:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:03,786 INFO L93 Difference]: Finished difference Result 46178 states and 83982 transitions. [2021-11-12 23:53:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:53:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2021-11-12 23:53:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:04,141 INFO L225 Difference]: With dead ends: 46178 [2021-11-12 23:53:04,142 INFO L226 Difference]: Without dead ends: 23218 [2021-11-12 23:53:04,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:53:04,449 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 21 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.00ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:04,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3594 Invalid, 95 Unknown, 0 Unchecked, 5.00ms Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 128.54ms Time] [2021-11-12 23:53:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2021-11-12 23:53:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 23178. [2021-11-12 23:53:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23178 states, 17727 states have (on average 1.55790601906696) internal successors, (27617), 18390 states have internal predecessors, (27617), 4130 states have call successors, (4130), 1195 states have call predecessors, (4130), 1320 states have return successors, (9312), 4160 states have call predecessors, (9312), 4088 states have call successors, (9312) [2021-11-12 23:53:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23178 states to 23178 states and 41059 transitions. [2021-11-12 23:53:06,365 INFO L78 Accepts]: Start accepts. Automaton has 23178 states and 41059 transitions. Word has length 98 [2021-11-12 23:53:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:06,374 INFO L470 AbstractCegarLoop]: Abstraction has 23178 states and 41059 transitions. [2021-11-12 23:53:06,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:53:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 23178 states and 41059 transitions. [2021-11-12 23:53:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:53:06,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:06,377 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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 23:53:06,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:06,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:06,592 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:06,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:06,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1156940538, now seen corresponding path program 1 times [2021-11-12 23:53:06,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:06,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003851971] [2021-11-12 23:53:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:06,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:06,595 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:06,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:53:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:07,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:53:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:53:07,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:53:07,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:07,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003851971] [2021-11-12 23:53:07,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003851971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:07,835 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:07,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:53:07,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471156234] [2021-11-12 23:53:07,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:07,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:53:07,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:53:07,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:53:07,843 INFO L87 Difference]: Start difference. First operand 23178 states and 41059 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:53:09,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:11,875 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 23:53:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:15,514 INFO L93 Difference]: Finished difference Result 72429 states and 149435 transitions. [2021-11-12 23:53:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:53:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 108 [2021-11-12 23:53:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:16,188 INFO L225 Difference]: With dead ends: 72429 [2021-11-12 23:53:16,188 INFO L226 Difference]: Without dead ends: 49269 [2021-11-12 23:53:16,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:53:16,390 INFO L933 BasicCegarLoop]: 1190 mSDtfsCounter, 962 mSDsluCounter, 4162 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4943.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 5352 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.08ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5212.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:16,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 5352 Invalid, 426 Unknown, 0 Unchecked, 12.08ms Time], IncrementalHoareTripleChecker [42 Valid, 382 Invalid, 2 Unknown, 0 Unchecked, 5212.84ms Time] [2021-11-12 23:53:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49269 states. [2021-11-12 23:53:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49269 to 46585. [2021-11-12 23:53:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 35611 states have (on average 1.5522731740192637) internal successors, (55278), 36970 states have internal predecessors, (55278), 8245 states have call successors, (8245), 2387 states have call predecessors, (8245), 2728 states have return successors, (24973), 8363 states have call predecessors, (24973), 8163 states have call successors, (24973) [2021-11-12 23:53:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 88496 transitions. [2021-11-12 23:53:19,853 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 88496 transitions. Word has length 108 [2021-11-12 23:53:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:19,854 INFO L470 AbstractCegarLoop]: Abstraction has 46585 states and 88496 transitions. [2021-11-12 23:53:19,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:53:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 88496 transitions. [2021-11-12 23:53:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:53:19,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:19,856 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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 23:53:19,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 23:53:20,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:20,072 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash -420388482, now seen corresponding path program 1 times [2021-11-12 23:53:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:20,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088045083] [2021-11-12 23:53:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:20,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:20,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:20,075 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:20,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:53:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:53:20,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:53:21,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:53:21,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:21,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088045083] [2021-11-12 23:53:21,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088045083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:21,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:21,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:53:21,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783551929] [2021-11-12 23:53:21,631 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:21,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:53:21,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:21,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:53:21,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:21,633 INFO L87 Difference]: Start difference. First operand 46585 states and 88496 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 23:53:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:28,256 INFO L93 Difference]: Finished difference Result 141604 states and 270172 transitions. [2021-11-12 23:53:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:28,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 109 [2021-11-12 23:53:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:28,984 INFO L225 Difference]: With dead ends: 141604 [2021-11-12 23:53:28,984 INFO L226 Difference]: Without dead ends: 96166 [2021-11-12 23:53:29,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:29,721 INFO L933 BasicCegarLoop]: 1306 mSDtfsCounter, 2291 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1061.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 2889 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.56ms SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1536.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:29,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2291 Valid, 2889 Invalid, 462 Unknown, 0 Unchecked, 8.56ms Time], IncrementalHoareTripleChecker [197 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1536.19ms Time] [2021-11-12 23:53:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96166 states. [2021-11-12 23:53:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96166 to 90733. [2021-11-12 23:53:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90733 states, 70226 states have (on average 1.5517044969099765) internal successors, (108970), 72142 states have internal predecessors, (108970), 15352 states have call successors, (15352), 4625 states have call predecessors, (15352), 5154 states have return successors, (49935), 15169 states have call predecessors, (49935), 15185 states have call successors, (49935) [2021-11-12 23:53:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90733 states to 90733 states and 174257 transitions. [2021-11-12 23:53:35,946 INFO L78 Accepts]: Start accepts. Automaton has 90733 states and 174257 transitions. Word has length 109 [2021-11-12 23:53:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:35,946 INFO L470 AbstractCegarLoop]: Abstraction has 90733 states and 174257 transitions. [2021-11-12 23:53:35,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 23:53:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 90733 states and 174257 transitions. [2021-11-12 23:53:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:53:35,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:35,951 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:35,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:36,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:36,168 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1081197664, now seen corresponding path program 1 times [2021-11-12 23:53:36,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:36,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611837029] [2021-11-12 23:53:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:36,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:36,170 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:36,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_958ce290-ae37-42be-ae5d-d12f5c176190/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:53:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:37,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:53:37,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:53:37,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 23:53:37,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:37,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611837029] [2021-11-12 23:53:37,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611837029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:37,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:37,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-12 23:53:37,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112926315] [2021-11-12 23:53:37,935 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:37,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:53:37,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:53:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:53:37,937 INFO L87 Difference]: Start difference. First operand 90733 states and 174257 transitions. Second operand has 8 states, 8 states have (on average 24.375) internal successors, (195), 8 states have internal predecessors, (195), 4 states have call successors, (43), 4 states have call predecessors, (43), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-12 23:53:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:45,447 INFO L93 Difference]: Finished difference Result 186222 states and 370819 transitions. [2021-11-12 23:53:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:53:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.375) internal successors, (195), 8 states have internal predecessors, (195), 4 states have call successors, (43), 4 states have call predecessors, (43), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) Word has length 163 [2021-11-12 23:53:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:46,683 INFO L225 Difference]: With dead ends: 186222 [2021-11-12 23:53:46,683 INFO L226 Difference]: Without dead ends: 95507 [2021-11-12 23:53:48,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:53:48,304 INFO L933 BasicCegarLoop]: 1041 mSDtfsCounter, 1196 mSDsluCounter, 3645 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 4686 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.18ms SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 383.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:48,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 4686 Invalid, 254 Unknown, 0 Unchecked, 7.18ms Time], IncrementalHoareTripleChecker [221 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 383.08ms Time] [2021-11-12 23:53:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95507 states.