./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.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_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/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_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/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_deb5fec9-a091-4320-a739-975e4b0011e9/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 f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:04:16,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:04:16,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:04:17,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:04:17,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:04:17,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:04:17,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:04:17,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:04:17,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:04:17,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:04:17,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:04:17,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:04:17,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:04:17,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:04:17,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:04:17,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:04:17,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:04:17,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:04:17,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:04:17,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:04:17,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:04:17,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:04:17,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:04:17,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:04:17,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:04:17,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:04:17,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:04:17,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:04:17,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:04:17,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:04:17,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:04:17,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:04:17,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:04:17,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:04:17,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:04:17,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:04:17,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:04:17,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:04:17,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:04:17,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:04:17,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:04:17,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:04:17,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:04:17,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:04:17,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:04:17,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:04:17,111 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:04:17,111 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:04:17,111 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:04:17,111 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:04:17,112 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:04:17,112 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:04:17,112 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:04:17,112 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:04:17,112 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:04:17,113 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:04:17,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:04:17,113 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:04:17,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:04:17,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:04:17,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:04:17,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:04:17,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:04:17,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:04:17,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:04:17,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:04:17,115 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:04:17,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:04:17,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:04:17,116 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:04:17,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:04:17,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:04:17,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:04:17,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:04:17,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:04:17,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:04:17,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:04:17,118 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:04:17,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:04:17,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:04:17,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:04:17,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:04:17,119 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_deb5fec9-a091-4320-a739-975e4b0011e9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2021-11-12 23:04:17,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:04:17,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:04:17,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:04:17,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:04:17,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:04:17,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2021-11-12 23:04:17,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data/57605f38d/9facd1570dff403b9796238e12b1109f/FLAG794ca7131 [2021-11-12 23:04:18,054 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:04:18,055 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2021-11-12 23:04:18,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data/57605f38d/9facd1570dff403b9796238e12b1109f/FLAG794ca7131 [2021-11-12 23:04:18,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data/57605f38d/9facd1570dff403b9796238e12b1109f [2021-11-12 23:04:18,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:04:18,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:04:18,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:04:18,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:04:18,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:04:18,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45cc476a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:18, skipping insertion in model container [2021-11-12 23:04:18,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:04:18" (1/1) ... [2021-11-12 23:04:18,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:04:18,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:04:18,665 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_deb5fec9-a091-4320-a739-975e4b0011e9/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2021-11-12 23:04:19,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:04:19,036 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 23:04:19,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29f4dec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:19, skipping insertion in model container [2021-11-12 23:04:19,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:04:19,037 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:04:19,039 INFO L158 Benchmark]: Toolchain (without parser) took 763.60ms. Allocated memory is still 115.3MB. Free memory was 81.6MB in the beginning and 75.1MB in the end (delta: 6.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:04:19,040 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 115.3MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 49.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:04:19,041 INFO L158 Benchmark]: CACSL2BoogieTranslator took 750.43ms. Allocated memory is still 115.3MB. Free memory was 81.3MB in the beginning and 75.1MB in the end (delta: 6.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:04:19,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 115.3MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 49.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 750.43ms. Allocated memory is still 115.3MB. Free memory was 81.3MB in the beginning and 75.1MB in the end (delta: 6.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: 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_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/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_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/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_deb5fec9-a091-4320-a739-975e4b0011e9/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 f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:04:21,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:04:21,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:04:21,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:04:21,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:04:21,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:04:21,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:04:21,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:04:21,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:04:21,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:04:21,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:04:21,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:04:21,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:04:21,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:04:21,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:04:21,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:04:21,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:04:21,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:04:21,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:04:21,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:04:21,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:04:21,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:04:21,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:04:21,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:04:21,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:04:21,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:04:21,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:04:21,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:04:21,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:04:21,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:04:21,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:04:21,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:04:21,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:04:21,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:04:21,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:04:21,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:04:21,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:04:21,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:04:21,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:04:21,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:04:21,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:04:21,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:04:21,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:04:21,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:04:21,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:04:21,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:04:21,399 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:04:21,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:04:21,399 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:04:21,400 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:04:21,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:04:21,400 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:04:21,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:04:21,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:04:21,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:04:21,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:04:21,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:04:21,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:04:21,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:04:21,402 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:04:21,403 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:04:21,403 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:04:21,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:04:21,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:04:21,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:04:21,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:04:21,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:04:21,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:04:21,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:04:21,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:04:21,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:04:21,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:04:21,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:04:21,406 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:04:21,406 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:04:21,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:04:21,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:04:21,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:04:21,407 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_deb5fec9-a091-4320-a739-975e4b0011e9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2021-11-12 23:04:21,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:04:21,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:04:21,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:04:21,800 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:04:21,801 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:04:21,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2021-11-12 23:04:21,876 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data/0db534732/e4e49958f6104b74af928ed9f6acc250/FLAGd86e1225f [2021-11-12 23:04:22,668 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:04:22,669 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2021-11-12 23:04:22,697 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data/0db534732/e4e49958f6104b74af928ed9f6acc250/FLAGd86e1225f [2021-11-12 23:04:22,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/data/0db534732/e4e49958f6104b74af928ed9f6acc250 [2021-11-12 23:04:22,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:04:22,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:04:22,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:04:22,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:04:22,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:04:22,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:04:22" (1/1) ... [2021-11-12 23:04:22,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3c0011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:22, skipping insertion in model container [2021-11-12 23:04:22,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:04:22" (1/1) ... [2021-11-12 23:04:22,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:04:22,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:04:23,063 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_deb5fec9-a091-4320-a739-975e4b0011e9/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2021-11-12 23:04:23,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:04:23,498 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:04:23,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:04:23,528 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_deb5fec9-a091-4320-a739-975e4b0011e9/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2021-11-12 23:04:23,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:04:23,717 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:04:23,740 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_deb5fec9-a091-4320-a739-975e4b0011e9/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2021-11-12 23:04:23,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:04:23,875 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:04:23,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23 WrapperNode [2021-11-12 23:04:23,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:04:23,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:04:23,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:04:23,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:04:23,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:23,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:04:24,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:04:24,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:04:24,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:04:24,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:04:24,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:04:24,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:04:24,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:04:24,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (1/1) ... [2021-11-12 23:04:24,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:04:24,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:24,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:04:24,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:04:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:04:24,227 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:04:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 23:04:24,228 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 23:04:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:04:24,228 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:04:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-12 23:04:24,228 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-12 23:04:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:04:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:04:24,229 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:04:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:04:24,229 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:04:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:04:24,229 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:04:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:04:24,229 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:04:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:04:24,230 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:04:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:04:24,230 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:04:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:04:24,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:04:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:04:24,230 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:04:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:04:24,231 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:04:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:04:24,231 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:04:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:04:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:04:24,231 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:04:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:04:24,232 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:04:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:04:24,232 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:04:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:04:24,232 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:04:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:04:24,232 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:04:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:04:24,233 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:04:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:04:24,233 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:04:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:04:24,233 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:04:24,233 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:04:24,233 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:04:24,234 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:04:24,234 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:04:24,235 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:04:24,236 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:04:24,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:04:24,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:04:24,237 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:04:24,237 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:04:28,254 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:04:28,254 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-12 23:04:28,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:04:28 BoogieIcfgContainer [2021-11-12 23:04:28,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:04:28,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:04:28,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:04:28,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:04:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:04:22" (1/3) ... [2021-11-12 23:04:28,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39018853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:04:28, skipping insertion in model container [2021-11-12 23:04:28,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:04:23" (2/3) ... [2021-11-12 23:04:28,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39018853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:04:28, skipping insertion in model container [2021-11-12 23:04:28,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:04:28" (3/3) ... [2021-11-12 23:04:28,265 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2021-11-12 23:04:28,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:04:28,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:04:28,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:04:28,333 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 23:04:28,333 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:04:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 600 states, 470 states have (on average 1.6893617021276597) internal successors, (794), 490 states have internal predecessors, (794), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 23:04:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:04:28,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:28,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:28,391 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash 498297979, now seen corresponding path program 1 times [2021-11-12 23:04:28,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:28,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826887054] [2021-11-12 23:04:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:28,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:28,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:28,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:28,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:04:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:29,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:04:29,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:04:29,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:04:29,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:29,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826887054] [2021-11-12 23:04:29,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826887054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:29,552 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:29,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:04:29,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266197387] [2021-11-12 23:04:29,554 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:29,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:04:29,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:04:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:04:29,591 INFO L87 Difference]: Start difference. First operand has 600 states, 470 states have (on average 1.6893617021276597) internal successors, (794), 490 states have internal predecessors, (794), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:04:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:29,712 INFO L93 Difference]: Finished difference Result 1178 states and 1979 transitions. [2021-11-12 23:04:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:04:29,714 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-12 23:04:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:29,752 INFO L225 Difference]: With dead ends: 1178 [2021-11-12 23:04:29,753 INFO L226 Difference]: Without dead ends: 590 [2021-11-12 23:04:29,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:04:29,773 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:29,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 8.54ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:04:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-12 23:04:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-11-12 23:04:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 463 states have (on average 1.6717062634989202) internal successors, (774), 481 states have internal predecessors, (774), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:04:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 975 transitions. [2021-11-12 23:04:29,891 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 975 transitions. Word has length 99 [2021-11-12 23:04:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:29,893 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 975 transitions. [2021-11-12 23:04:29,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:04:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 975 transitions. [2021-11-12 23:04:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:04:29,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:29,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:29,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:30,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:30,126 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1305262619, now seen corresponding path program 1 times [2021-11-12 23:04:30,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:30,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688784359] [2021-11-12 23:04:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:30,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:30,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:30,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:30,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:04:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:04:31,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:04:31,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:31,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688784359] [2021-11-12 23:04:31,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688784359] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:31,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:31,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:04:31,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231902388] [2021-11-12 23:04:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:31,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:04:31,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:04:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:31,427 INFO L87 Difference]: Start difference. First operand 590 states and 975 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:04:31,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:31,624 INFO L93 Difference]: Finished difference Result 1176 states and 1950 transitions. [2021-11-12 23:04:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:04:31,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-12 23:04:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:31,635 INFO L225 Difference]: With dead ends: 1176 [2021-11-12 23:04:31,635 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 23:04:31,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:04:31,642 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 15 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.25ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:31,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2871 Invalid, 43 Unknown, 0 Unchecked, 44.25ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 56.17ms Time] [2021-11-12 23:04:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 23:04:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-11-12 23:04:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 466 states have (on average 1.667381974248927) internal successors, (777), 484 states have internal predecessors, (777), 102 states have call successors, (102), 27 states have call predecessors, (102), 25 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:04:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 978 transitions. [2021-11-12 23:04:31,720 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 978 transitions. Word has length 99 [2021-11-12 23:04:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:31,722 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 978 transitions. [2021-11-12 23:04:31,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:04:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 978 transitions. [2021-11-12 23:04:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:04:31,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:31,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:31,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:31,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:31,950 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1064925813, now seen corresponding path program 1 times [2021-11-12 23:04:31,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:31,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487549232] [2021-11-12 23:04:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:31,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:31,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:31,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:04:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:32,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:32,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:04:32,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:04:33,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:33,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487549232] [2021-11-12 23:04:33,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487549232] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:33,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:33,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:04:33,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675938857] [2021-11-12 23:04:33,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:33,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:04:33,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:04:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:33,194 INFO L87 Difference]: Start difference. First operand 594 states and 978 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:04:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:33,498 INFO L93 Difference]: Finished difference Result 1200 states and 1981 transitions. [2021-11-12 23:04:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:33,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-12 23:04:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:33,507 INFO L225 Difference]: With dead ends: 1200 [2021-11-12 23:04:33,507 INFO L226 Difference]: Without dead ends: 616 [2021-11-12 23:04:33,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 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 23:04:33,513 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 119 mSDsluCounter, 4742 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5712 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.84ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:33,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5712 Invalid, 98 Unknown, 0 Unchecked, 16.84ms Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 217.03ms Time] [2021-11-12 23:04:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-12 23:04:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 607. [2021-11-12 23:04:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 476 states have (on average 1.6638655462184875) internal successors, (792), 496 states have internal predecessors, (792), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (105), 97 states have call predecessors, (105), 100 states have call successors, (105) [2021-11-12 23:04:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1000 transitions. [2021-11-12 23:04:33,554 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1000 transitions. Word has length 101 [2021-11-12 23:04:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:33,555 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1000 transitions. [2021-11-12 23:04:33,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:04:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1000 transitions. [2021-11-12 23:04:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:04:33,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:33,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:33,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:33,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:33,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:33,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash -506135645, now seen corresponding path program 1 times [2021-11-12 23:04:33,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:33,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473174184] [2021-11-12 23:04:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:33,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:33,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:33,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:04:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:34,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:34,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:04:34,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:34,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:34,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473174184] [2021-11-12 23:04:34,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473174184] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:34,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:34,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:04:34,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117323829] [2021-11-12 23:04:34,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:34,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:04:34,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:04:34,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:34,787 INFO L87 Difference]: Start difference. First operand 607 states and 1000 transitions. Second operand has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:35,158 INFO L93 Difference]: Finished difference Result 1220 states and 2014 transitions. [2021-11-12 23:04:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:35,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-11-12 23:04:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:35,168 INFO L225 Difference]: With dead ends: 1220 [2021-11-12 23:04:35,168 INFO L226 Difference]: Without dead ends: 625 [2021-11-12 23:04:35,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 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 23:04:35,174 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 105 mSDsluCounter, 4773 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5754 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 298.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:35,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5754 Invalid, 120 Unknown, 0 Unchecked, 12.03ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 298.75ms Time] [2021-11-12 23:04:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-12 23:04:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 607. [2021-11-12 23:04:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 476 states have (on average 1.6638655462184875) internal successors, (792), 496 states have internal predecessors, (792), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (105), 97 states have call predecessors, (105), 100 states have call successors, (105) [2021-11-12 23:04:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1000 transitions. [2021-11-12 23:04:35,211 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1000 transitions. Word has length 86 [2021-11-12 23:04:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:35,211 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1000 transitions. [2021-11-12 23:04:35,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1000 transitions. [2021-11-12 23:04:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:04:35,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:35,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:35,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:35,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:35,436 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:35,437 INFO L85 PathProgramCache]: Analyzing trace with hash 824329637, now seen corresponding path program 1 times [2021-11-12 23:04:35,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:35,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511403234] [2021-11-12 23:04:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:35,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:35,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:35,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:04:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:35,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:35,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:04:36,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:04:36,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:36,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511403234] [2021-11-12 23:04:36,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511403234] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:36,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:36,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:04:36,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045125059] [2021-11-12 23:04:36,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:36,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:04:36,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:36,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:04:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:36,371 INFO L87 Difference]: Start difference. First operand 607 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:04:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:36,469 INFO L93 Difference]: Finished difference Result 1205 states and 1989 transitions. [2021-11-12 23:04:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:04:36,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-12 23:04:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:36,476 INFO L225 Difference]: With dead ends: 1205 [2021-11-12 23:04:36,477 INFO L226 Difference]: Without dead ends: 608 [2021-11-12 23:04:36,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 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 23:04:36,483 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 22 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.59ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:36,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2871 Invalid, 36 Unknown, 0 Unchecked, 5.59ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 49.64ms Time] [2021-11-12 23:04:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-12 23:04:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2021-11-12 23:04:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 478 states have (on average 1.6631799163179917) internal successors, (795), 497 states have internal predecessors, (795), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (101), 96 states have call predecessors, (101), 99 states have call successors, (101) [2021-11-12 23:04:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 998 transitions. [2021-11-12 23:04:36,515 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 998 transitions. Word has length 86 [2021-11-12 23:04:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:36,515 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 998 transitions. [2021-11-12 23:04:36,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:04:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 998 transitions. [2021-11-12 23:04:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:04:36,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:36,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:36,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:36,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:36,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:36,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1592290023, now seen corresponding path program 1 times [2021-11-12 23:04:36,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:36,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346892696] [2021-11-12 23:04:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:36,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:36,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:36,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:36,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:04:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:37,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:04:37,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:37,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:37,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346892696] [2021-11-12 23:04:37,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346892696] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:37,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:37,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:04:37,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655752358] [2021-11-12 23:04:37,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:37,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:04:37,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:37,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:04:37,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:37,725 INFO L87 Difference]: Start difference. First operand 608 states and 998 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:38,024 INFO L93 Difference]: Finished difference Result 1210 states and 1994 transitions. [2021-11-12 23:04:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:38,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-12 23:04:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:38,032 INFO L225 Difference]: With dead ends: 1210 [2021-11-12 23:04:38,032 INFO L226 Difference]: Without dead ends: 617 [2021-11-12 23:04:38,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 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 23:04:38,037 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 104 mSDsluCounter, 4730 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5703 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.04ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 232.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:38,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5703 Invalid, 107 Unknown, 0 Unchecked, 11.04ms Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 232.21ms Time] [2021-11-12 23:04:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-12 23:04:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 608. [2021-11-12 23:04:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 478 states have (on average 1.6631799163179917) internal successors, (795), 497 states have internal predecessors, (795), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (101), 96 states have call predecessors, (101), 99 states have call successors, (101) [2021-11-12 23:04:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 998 transitions. [2021-11-12 23:04:38,068 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 998 transitions. Word has length 88 [2021-11-12 23:04:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:38,069 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 998 transitions. [2021-11-12 23:04:38,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 998 transitions. [2021-11-12 23:04:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:04:38,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:38,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:38,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:38,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:38,286 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash 944309273, now seen corresponding path program 1 times [2021-11-12 23:04:38,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:38,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447387609] [2021-11-12 23:04:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:38,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:38,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:38,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:04:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:04:38,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:04:39,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:39,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447387609] [2021-11-12 23:04:39,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447387609] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:39,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:39,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:04:39,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986350701] [2021-11-12 23:04:39,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:39,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:04:39,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:04:39,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:39,284 INFO L87 Difference]: Start difference. First operand 608 states and 998 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 23:04:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:39,525 INFO L93 Difference]: Finished difference Result 1230 states and 2032 transitions. [2021-11-12 23:04:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:04:39,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 105 [2021-11-12 23:04:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:39,533 INFO L225 Difference]: With dead ends: 1230 [2021-11-12 23:04:39,533 INFO L226 Difference]: Without dead ends: 637 [2021-11-12 23:04:39,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:04:39,538 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 112 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.15ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:39,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2715 Invalid, 147 Unknown, 0 Unchecked, 6.15ms Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 192.90ms Time] [2021-11-12 23:04:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-12 23:04:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 628. [2021-11-12 23:04:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 497 states have (on average 1.6579476861167002) internal successors, (824), 516 states have internal predecessors, (824), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:04:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1026 transitions. [2021-11-12 23:04:39,567 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1026 transitions. Word has length 105 [2021-11-12 23:04:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:39,567 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1026 transitions. [2021-11-12 23:04:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 23:04:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1026 transitions. [2021-11-12 23:04:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 23:04:39,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:39,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:39,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 23:04:39,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:39,791 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:39,792 INFO L85 PathProgramCache]: Analyzing trace with hash -506366901, now seen corresponding path program 1 times [2021-11-12 23:04:39,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:39,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310479433] [2021-11-12 23:04:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:39,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:39,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:39,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:04:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:40,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:04:40,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:40,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:40,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310479433] [2021-11-12 23:04:40,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310479433] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:40,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:40,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:04:40,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842025930] [2021-11-12 23:04:40,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:40,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:04:40,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:40,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:04:40,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:04:40,734 INFO L87 Difference]: Start difference. First operand 628 states and 1026 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:40,990 INFO L93 Difference]: Finished difference Result 1259 states and 2063 transitions. [2021-11-12 23:04:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:40,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 90 [2021-11-12 23:04:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:40,998 INFO L225 Difference]: With dead ends: 1259 [2021-11-12 23:04:40,998 INFO L226 Difference]: Without dead ends: 646 [2021-11-12 23:04:41,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:04:41,003 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 154 mSDsluCounter, 4658 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5619 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:41,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5619 Invalid, 89 Unknown, 0 Unchecked, 9.39ms Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 198.42ms Time] [2021-11-12 23:04:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-12 23:04:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 628. [2021-11-12 23:04:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 497 states have (on average 1.6579476861167002) internal successors, (824), 516 states have internal predecessors, (824), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:04:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1026 transitions. [2021-11-12 23:04:41,032 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1026 transitions. Word has length 90 [2021-11-12 23:04:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:41,032 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1026 transitions. [2021-11-12 23:04:41,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1026 transitions. [2021-11-12 23:04:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:04:41,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:41,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:41,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:41,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:41,253 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:41,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1957328933, now seen corresponding path program 1 times [2021-11-12 23:04:41,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:41,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105814863] [2021-11-12 23:04:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:41,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:41,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:41,256 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:41,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:04:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:04:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:04:42,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:04:42,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:42,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105814863] [2021-11-12 23:04:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105814863] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:42,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:42,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:04:42,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042481878] [2021-11-12 23:04:42,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:42,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:04:42,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:04:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:04:42,551 INFO L87 Difference]: Start difference. First operand 628 states and 1026 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:04:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:42,920 INFO L93 Difference]: Finished difference Result 1254 states and 2054 transitions. [2021-11-12 23:04:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:04:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2021-11-12 23:04:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:42,929 INFO L225 Difference]: With dead ends: 1254 [2021-11-12 23:04:42,929 INFO L226 Difference]: Without dead ends: 641 [2021-11-12 23:04:42,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:04:42,935 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 112 mSDsluCounter, 5599 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6550 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.40ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 265.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:42,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6550 Invalid, 160 Unknown, 0 Unchecked, 11.40ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 265.60ms Time] [2021-11-12 23:04:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-11-12 23:04:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 632. [2021-11-12 23:04:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 501 states have (on average 1.652694610778443) internal successors, (828), 520 states have internal predecessors, (828), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:04:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1030 transitions. [2021-11-12 23:04:42,967 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1030 transitions. Word has length 107 [2021-11-12 23:04:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:42,968 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1030 transitions. [2021-11-12 23:04:42,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:04:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1030 transitions. [2021-11-12 23:04:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:04:42,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:42,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:42,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:43,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:43,184 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1995368171, now seen corresponding path program 1 times [2021-11-12 23:04:43,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:43,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833048707] [2021-11-12 23:04:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:43,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:43,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:43,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:04:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:04:43,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:04:43,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:44,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:44,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833048707] [2021-11-12 23:04:44,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833048707] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:44,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:44,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:04:44,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285020919] [2021-11-12 23:04:44,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:44,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:04:44,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:04:44,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:04:44,345 INFO L87 Difference]: Start difference. First operand 632 states and 1030 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:44,771 INFO L93 Difference]: Finished difference Result 1264 states and 2066 transitions. [2021-11-12 23:04:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:04:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 92 [2021-11-12 23:04:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:44,779 INFO L225 Difference]: With dead ends: 1264 [2021-11-12 23:04:44,779 INFO L226 Difference]: Without dead ends: 647 [2021-11-12 23:04:44,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:04:44,784 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 108 mSDsluCounter, 5605 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 285.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.99ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:44,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6558 Invalid, 179 Unknown, 0 Unchecked, 33.99ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 316.00ms Time] [2021-11-12 23:04:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-12 23:04:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 638. [2021-11-12 23:04:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 507 states have (on average 1.6449704142011834) internal successors, (834), 526 states have internal predecessors, (834), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:04:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1036 transitions. [2021-11-12 23:04:44,813 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1036 transitions. Word has length 92 [2021-11-12 23:04:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:44,813 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1036 transitions. [2021-11-12 23:04:44,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1036 transitions. [2021-11-12 23:04:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:04:44,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:44,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:44,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:45,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:45,034 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1293896321, now seen corresponding path program 1 times [2021-11-12 23:04:45,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:45,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010658441] [2021-11-12 23:04:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:45,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:45,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:45,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:45,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:04:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:45,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:04:45,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:04:45,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:46,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:46,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010658441] [2021-11-12 23:04:46,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010658441] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:46,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:46,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:04:46,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233380641] [2021-11-12 23:04:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:46,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:04:46,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:04:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:04:46,209 INFO L87 Difference]: Start difference. First operand 638 states and 1036 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:46,657 INFO L93 Difference]: Finished difference Result 1278 states and 2082 transitions. [2021-11-12 23:04:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:04:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-12 23:04:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:46,665 INFO L225 Difference]: With dead ends: 1278 [2021-11-12 23:04:46,665 INFO L226 Difference]: Without dead ends: 655 [2021-11-12 23:04:46,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:04:46,670 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 108 mSDsluCounter, 5605 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 296.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.31ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 328.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:46,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6558 Invalid, 184 Unknown, 0 Unchecked, 8.31ms Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 328.56ms Time] [2021-11-12 23:04:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-12 23:04:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 646. [2021-11-12 23:04:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 515 states have (on average 1.6349514563106795) internal successors, (842), 534 states have internal predecessors, (842), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-12 23:04:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1044 transitions. [2021-11-12 23:04:46,701 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1044 transitions. Word has length 93 [2021-11-12 23:04:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:46,702 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1044 transitions. [2021-11-12 23:04:46,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:04:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1044 transitions. [2021-11-12 23:04:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 23:04:46,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:46,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:46,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:46,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:46,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:46,921 INFO L85 PathProgramCache]: Analyzing trace with hash 55486278, now seen corresponding path program 1 times [2021-11-12 23:04:46,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:46,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985416368] [2021-11-12 23:04:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:46,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:46,923 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:46,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:04:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:47,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:47,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:47,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:47,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:47,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985416368] [2021-11-12 23:04:47,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985416368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:47,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:47,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:04:47,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698707559] [2021-11-12 23:04:47,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:04:47,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:04:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:47,997 INFO L87 Difference]: Start difference. First operand 646 states and 1044 transitions. Second operand has 11 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:04:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:48,290 INFO L93 Difference]: Finished difference Result 1217 states and 1966 transitions. [2021-11-12 23:04:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:04:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 94 [2021-11-12 23:04:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:48,298 INFO L225 Difference]: With dead ends: 1217 [2021-11-12 23:04:48,298 INFO L226 Difference]: Without dead ends: 664 [2021-11-12 23:04:48,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 178 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 23:04:48,304 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 187 mSDsluCounter, 4781 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 206.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 5742 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.09ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 236.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:48,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 5742 Invalid, 118 Unknown, 0 Unchecked, 7.09ms Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 236.71ms Time] [2021-11-12 23:04:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-12 23:04:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 653. [2021-11-12 23:04:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 519 states have (on average 1.630057803468208) internal successors, (846), 540 states have internal predecessors, (846), 103 states have call successors, (103), 29 states have call predecessors, (103), 30 states have return successors, (104), 97 states have call predecessors, (104), 100 states have call successors, (104) [2021-11-12 23:04:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1053 transitions. [2021-11-12 23:04:48,371 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1053 transitions. Word has length 94 [2021-11-12 23:04:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:48,372 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1053 transitions. [2021-11-12 23:04:48,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 23:04:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1053 transitions. [2021-11-12 23:04:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:04:48,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:48,377 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:48,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:48,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:48,593 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:48,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1133005433, now seen corresponding path program 1 times [2021-11-12 23:04:48,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:48,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937714823] [2021-11-12 23:04:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:48,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:48,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:48,595 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:48,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:04:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:49,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:04:49,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:04:49,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:49,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937714823] [2021-11-12 23:04:49,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937714823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:49,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:49,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:04:49,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582239450] [2021-11-12 23:04:49,710 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:49,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:04:49,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:04:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:49,712 INFO L87 Difference]: Start difference. First operand 653 states and 1053 transitions. Second operand has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:04:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:50,041 INFO L93 Difference]: Finished difference Result 1220 states and 1969 transitions. [2021-11-12 23:04:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:04:50,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 112 [2021-11-12 23:04:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:50,048 INFO L225 Difference]: With dead ends: 1220 [2021-11-12 23:04:50,048 INFO L226 Difference]: Without dead ends: 667 [2021-11-12 23:04:50,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 214 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 23:04:50,052 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 180 mSDsluCounter, 5751 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 6714 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.21ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 275.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:50,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 6714 Invalid, 146 Unknown, 0 Unchecked, 8.21ms Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 275.76ms Time] [2021-11-12 23:04:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-12 23:04:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 660. [2021-11-12 23:04:50,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 523 states have (on average 1.6252390057361377) internal successors, (850), 546 states have internal predecessors, (850), 104 states have call successors, (104), 29 states have call predecessors, (104), 32 states have return successors, (108), 98 states have call predecessors, (108), 101 states have call successors, (108) [2021-11-12 23:04:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1062 transitions. [2021-11-12 23:04:50,082 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1062 transitions. Word has length 112 [2021-11-12 23:04:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:50,082 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1062 transitions. [2021-11-12 23:04:50,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:04:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1062 transitions. [2021-11-12 23:04:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:04:50,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:50,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:50,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:50,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:50,305 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:50,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1864272884, now seen corresponding path program 1 times [2021-11-12 23:04:50,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:50,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564521636] [2021-11-12 23:04:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:50,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:50,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:50,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:04:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:50,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:04:51,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:51,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564521636] [2021-11-12 23:04:51,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564521636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:51,336 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:51,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:04:51,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974495325] [2021-11-12 23:04:51,337 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:51,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:04:51,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:04:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:04:51,338 INFO L87 Difference]: Start difference. First operand 660 states and 1062 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:04:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:51,559 INFO L93 Difference]: Finished difference Result 1221 states and 1970 transitions. [2021-11-12 23:04:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 96 [2021-11-12 23:04:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:51,567 INFO L225 Difference]: With dead ends: 1221 [2021-11-12 23:04:51,567 INFO L226 Difference]: Without dead ends: 668 [2021-11-12 23:04:51,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 185 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 23:04:51,572 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 230 mSDsluCounter, 3789 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 4754 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:51,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 4754 Invalid, 85 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 180.45ms Time] [2021-11-12 23:04:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-12 23:04:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 663. [2021-11-12 23:04:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 525 states have (on average 1.6228571428571428) internal successors, (852), 549 states have internal predecessors, (852), 104 states have call successors, (104), 29 states have call predecessors, (104), 33 states have return successors, (109), 98 states have call predecessors, (109), 101 states have call successors, (109) [2021-11-12 23:04:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1065 transitions. [2021-11-12 23:04:51,603 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1065 transitions. Word has length 96 [2021-11-12 23:04:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:51,604 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1065 transitions. [2021-11-12 23:04:51,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:04:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1065 transitions. [2021-11-12 23:04:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:04:51,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:51,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:51,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:51,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:51,825 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:51,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:51,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1546820927, now seen corresponding path program 1 times [2021-11-12 23:04:51,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:51,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728681015] [2021-11-12 23:04:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:51,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:51,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:51,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:04:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:52,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:52,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:04:52,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:04:52,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:52,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728681015] [2021-11-12 23:04:52,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728681015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:52,913 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:52,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:04:52,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994104187] [2021-11-12 23:04:52,913 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:52,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:04:52,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:52,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:04:52,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:52,916 INFO L87 Difference]: Start difference. First operand 663 states and 1065 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:04:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:53,011 INFO L93 Difference]: Finished difference Result 1291 states and 2078 transitions. [2021-11-12 23:04:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:04:53,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2021-11-12 23:04:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:53,017 INFO L225 Difference]: With dead ends: 1291 [2021-11-12 23:04:53,017 INFO L226 Difference]: Without dead ends: 613 [2021-11-12 23:04:53,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 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 23:04:53,023 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 23 mSDsluCounter, 2866 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3825 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.86ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:53,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 3825 Invalid, 38 Unknown, 0 Unchecked, 7.86ms Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 53.13ms Time] [2021-11-12 23:04:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-12 23:04:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2021-11-12 23:04:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 482 states have (on average 1.6058091286307055) internal successors, (774), 501 states have internal predecessors, (774), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:04:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 975 transitions. [2021-11-12 23:04:53,050 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 975 transitions. Word has length 112 [2021-11-12 23:04:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:53,050 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 975 transitions. [2021-11-12 23:04:53,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:04:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 975 transitions. [2021-11-12 23:04:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:04:53,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:53,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:53,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:53,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:53,268 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2103482554, now seen corresponding path program 1 times [2021-11-12 23:04:53,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:53,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453636531] [2021-11-12 23:04:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:53,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:53,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:53,270 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:53,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:04:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:04:53,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:04:54,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:54,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453636531] [2021-11-12 23:04:54,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453636531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:54,263 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:54,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:04:54,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762140575] [2021-11-12 23:04:54,264 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:54,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:04:54,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:54,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:04:54,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:54,268 INFO L87 Difference]: Start difference. First operand 613 states and 975 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:04:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:54,455 INFO L93 Difference]: Finished difference Result 1252 states and 1983 transitions. [2021-11-12 23:04:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2021-11-12 23:04:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:54,462 INFO L225 Difference]: With dead ends: 1252 [2021-11-12 23:04:54,462 INFO L226 Difference]: Without dead ends: 610 [2021-11-12 23:04:54,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:04:54,466 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 134 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.17ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:54,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 3577 Invalid, 90 Unknown, 0 Unchecked, 4.17ms Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 140.01ms Time] [2021-11-12 23:04:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-12 23:04:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-12 23:04:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 479 states have (on average 1.5845511482254697) internal successors, (759), 497 states have internal predecessors, (759), 102 states have call successors, (102), 30 states have call predecessors, (102), 28 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:04:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 960 transitions. [2021-11-12 23:04:54,508 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 960 transitions. Word has length 114 [2021-11-12 23:04:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:54,509 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 960 transitions. [2021-11-12 23:04:54,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:04:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 960 transitions. [2021-11-12 23:04:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:04:54,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:54,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:54,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:54,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:54,729 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:54,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2013646998, now seen corresponding path program 1 times [2021-11-12 23:04:54,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:54,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387949130] [2021-11-12 23:04:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:54,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:54,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:54,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:54,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:04:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:55,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:04:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:04:55,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:04:55,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:55,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387949130] [2021-11-12 23:04:55,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387949130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:55,882 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:55,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:04:55,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821889649] [2021-11-12 23:04:55,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:55,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:04:55,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:04:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:04:55,884 INFO L87 Difference]: Start difference. First operand 610 states and 960 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:04:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:56,987 INFO L93 Difference]: Finished difference Result 2247 states and 3655 transitions. [2021-11-12 23:04:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:04:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2021-11-12 23:04:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:57,000 INFO L225 Difference]: With dead ends: 2247 [2021-11-12 23:04:57,001 INFO L226 Difference]: Without dead ends: 1698 [2021-11-12 23:04:57,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 194 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 23:04:57,005 INFO L933 BasicCegarLoop]: 1098 mSDtfsCounter, 1735 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 856.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 3516 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.75ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1012.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:57,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 3516 Invalid, 294 Unknown, 0 Unchecked, 14.75ms Time], IncrementalHoareTripleChecker [9 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1012.72ms Time] [2021-11-12 23:04:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-11-12 23:04:57,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1568. [2021-11-12 23:04:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1253 states have (on average 1.6241021548284118) internal successors, (2035), 1288 states have internal predecessors, (2035), 248 states have call successors, (248), 70 states have call predecessors, (248), 66 states have return successors, (259), 225 states have call predecessors, (259), 243 states have call successors, (259) [2021-11-12 23:04:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2542 transitions. [2021-11-12 23:04:57,075 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2542 transitions. Word has length 99 [2021-11-12 23:04:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:57,076 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 2542 transitions. [2021-11-12 23:04:57,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 23:04:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2542 transitions. [2021-11-12 23:04:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-12 23:04:57,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:57,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:04:57,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:57,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:57,296 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:57,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1473971039, now seen corresponding path program 1 times [2021-11-12 23:04:57,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:57,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311921561] [2021-11-12 23:04:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:57,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:57,299 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:57,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:04:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:57,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:57,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:04:58,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 23:04:58,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:58,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311921561] [2021-11-12 23:04:58,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311921561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:58,942 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:58,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:04:58,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912383122] [2021-11-12 23:04:58,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:58,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:04:58,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:04:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:58,944 INFO L87 Difference]: Start difference. First operand 1568 states and 2542 transitions. Second operand has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 7 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2021-11-12 23:05:00,993 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 23:05:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:12,148 INFO L93 Difference]: Finished difference Result 5407 states and 8847 transitions. [2021-11-12 23:05:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:05:12,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 7 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 189 [2021-11-12 23:05:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:12,169 INFO L225 Difference]: With dead ends: 5407 [2021-11-12 23:05:12,169 INFO L226 Difference]: Without dead ends: 3900 [2021-11-12 23:05:12,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:05:12,177 INFO L933 BasicCegarLoop]: 1905 mSDtfsCounter, 3026 mSDsluCounter, 2109 mSDsCounter, 0 mSdLazyCounter, 8282 mSolverCounterSat, 1036 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11320.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3109 SdHoareTripleChecker+Valid, 4014 SdHoareTripleChecker+Invalid, 9319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 63.25ms SdHoareTripleChecker+Time, 1036 IncrementalHoareTripleChecker+Valid, 8282 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12612.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:12,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3109 Valid, 4014 Invalid, 9319 Unknown, 0 Unchecked, 63.25ms Time], IncrementalHoareTripleChecker [1036 Valid, 8282 Invalid, 1 Unknown, 0 Unchecked, 12612.19ms Time] [2021-11-12 23:05:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-11-12 23:05:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 3721. [2021-11-12 23:05:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 2876 states have (on average 1.5660639777468706) internal successors, (4504), 2954 states have internal predecessors, (4504), 700 states have call successors, (700), 137 states have call predecessors, (700), 144 states have return successors, (814), 663 states have call predecessors, (814), 691 states have call successors, (814) [2021-11-12 23:05:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 6018 transitions. [2021-11-12 23:05:12,374 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 6018 transitions. Word has length 189 [2021-11-12 23:05:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:12,375 INFO L470 AbstractCegarLoop]: Abstraction has 3721 states and 6018 transitions. [2021-11-12 23:05:12,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 7 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2021-11-12 23:05:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 6018 transitions. [2021-11-12 23:05:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:05:12,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:12,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:12,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:12,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:05:12,596 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash -882332478, now seen corresponding path program 1 times [2021-11-12 23:05:12,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:05:12,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641384534] [2021-11-12 23:05:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:12,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:05:12,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:05:12,598 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:05:12,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:05:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:05:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:05:14,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:05:16,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:16,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641384534] [2021-11-12 23:05:16,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641384534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:16,928 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:16,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-12 23:05:16,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698256569] [2021-11-12 23:05:16,928 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:16,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:05:16,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:05:16,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:05:16,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:05:16,930 INFO L87 Difference]: Start difference. First operand 3721 states and 6018 transitions. Second operand has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 23:05:18,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:20,960 WARN L515 Checker$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 23:05:22,966 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:24,971 WARN L515 Checker$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 23:05:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:47,151 INFO L93 Difference]: Finished difference Result 8864 states and 14653 transitions. [2021-11-12 23:05:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:05:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 137 [2021-11-12 23:05:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:47,191 INFO L225 Difference]: With dead ends: 8864 [2021-11-12 23:05:47,191 INFO L226 Difference]: Without dead ends: 5204 [2021-11-12 23:05:47,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:05:47,209 INFO L933 BasicCegarLoop]: 1119 mSDtfsCounter, 3904 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 5896 mSolverCounterSat, 1030 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25858.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4000 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 6930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.96ms SdHoareTripleChecker+Time, 1030 IncrementalHoareTripleChecker+Valid, 5896 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29573.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:47,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4000 Valid, 2731 Invalid, 6930 Unknown, 0 Unchecked, 35.96ms Time], IncrementalHoareTripleChecker [1030 Valid, 5896 Invalid, 4 Unknown, 0 Unchecked, 29573.62ms Time] [2021-11-12 23:05:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2021-11-12 23:05:47,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4282. [2021-11-12 23:05:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 3192 states have (on average 1.5595238095238095) internal successors, (4978), 3324 states have internal predecessors, (4978), 937 states have call successors, (937), 138 states have call predecessors, (937), 152 states have return successors, (1080), 885 states have call predecessors, (1080), 928 states have call successors, (1080) [2021-11-12 23:05:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 6995 transitions. [2021-11-12 23:05:47,534 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 6995 transitions. Word has length 137 [2021-11-12 23:05:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:47,534 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 6995 transitions. [2021-11-12 23:05:47,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 23:05:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 6995 transitions. [2021-11-12 23:05:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-12 23:05:47,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:47,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:47,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:47,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:05:47,762 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1093435191, now seen corresponding path program 1 times [2021-11-12 23:05:47,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:05:47,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148734323] [2021-11-12 23:05:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:47,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:05:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:05:47,764 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:05:47,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:05:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:05:48,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:05:48,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:05:49,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:49,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148734323] [2021-11-12 23:05:49,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148734323] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:05:49,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:05:49,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-11-12 23:05:49,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488180843] [2021-11-12 23:05:49,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:49,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:05:49,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:05:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:05:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:05:49,426 INFO L87 Difference]: Start difference. First operand 4282 states and 6995 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-12 23:05:51,445 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 23:05:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:56,974 INFO L93 Difference]: Finished difference Result 17349 states and 29929 transitions. [2021-11-12 23:05:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:05:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 138 [2021-11-12 23:05:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:57,074 INFO L225 Difference]: With dead ends: 17349 [2021-11-12 23:05:57,074 INFO L226 Difference]: Without dead ends: 12621 [2021-11-12 23:05:57,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:05:57,159 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 2690 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 798 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6167.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2868 SdHoareTripleChecker+Valid, 3248 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.01ms SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6810.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:57,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2868 Valid, 3248 Invalid, 3726 Unknown, 0 Unchecked, 24.01ms Time], IncrementalHoareTripleChecker [798 Valid, 2927 Invalid, 1 Unknown, 0 Unchecked, 6810.88ms Time] [2021-11-12 23:05:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2021-11-12 23:05:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 9417. [2021-11-12 23:05:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 6769 states have (on average 1.5622691682671) internal successors, (10575), 7131 states have internal predecessors, (10575), 2325 states have call successors, (2325), 249 states have call predecessors, (2325), 322 states have return successors, (3106), 2216 states have call predecessors, (3106), 2309 states have call successors, (3106) [2021-11-12 23:05:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 16006 transitions. [2021-11-12 23:05:58,039 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 16006 transitions. Word has length 138 [2021-11-12 23:05:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:58,040 INFO L470 AbstractCegarLoop]: Abstraction has 9417 states and 16006 transitions. [2021-11-12 23:05:58,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-12 23:05:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 16006 transitions. [2021-11-12 23:05:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:05:58,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:58,053 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:58,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:58,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:05:58,273 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1574607829, now seen corresponding path program 1 times [2021-11-12 23:05:58,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:05:58,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513825203] [2021-11-12 23:05:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:58,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:05:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:05:58,275 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:05:58,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:05:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:58,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:05:58,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:05:59,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:05:59,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:59,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513825203] [2021-11-12 23:05:59,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513825203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:59,554 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:59,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:05:59,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374308336] [2021-11-12 23:05:59,555 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:59,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:05:59,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:05:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:05:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:05:59,557 INFO L87 Difference]: Start difference. First operand 9417 states and 16006 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 23:06:01,584 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 23:06:03,591 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 23:06:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:12,234 INFO L93 Difference]: Finished difference Result 31603 states and 56102 transitions. [2021-11-12 23:06:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:06:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) Word has length 139 [2021-11-12 23:06:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:12,381 INFO L225 Difference]: With dead ends: 31603 [2021-11-12 23:06:12,381 INFO L226 Difference]: Without dead ends: 22247 [2021-11-12 23:06:12,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:06:12,440 INFO L933 BasicCegarLoop]: 1647 mSDtfsCounter, 4325 mSDsluCounter, 2283 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 1274 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10404.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4429 SdHoareTripleChecker+Valid, 3930 SdHoareTripleChecker+Invalid, 6531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.27ms SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11339.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:12,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4429 Valid, 3930 Invalid, 6531 Unknown, 0 Unchecked, 34.27ms Time], IncrementalHoareTripleChecker [1274 Valid, 5255 Invalid, 2 Unknown, 0 Unchecked, 11339.89ms Time] [2021-11-12 23:06:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22247 states. [2021-11-12 23:06:13,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22247 to 20161. [2021-11-12 23:06:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20161 states, 14491 states have (on average 1.559519701883928) internal successors, (22599), 15294 states have internal predecessors, (22599), 4918 states have call successors, (4918), 602 states have call predecessors, (4918), 751 states have return successors, (6753), 4640 states have call predecessors, (6753), 4896 states have call successors, (6753) [2021-11-12 23:06:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20161 states to 20161 states and 34270 transitions. [2021-11-12 23:06:14,308 INFO L78 Accepts]: Start accepts. Automaton has 20161 states and 34270 transitions. Word has length 139 [2021-11-12 23:06:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:14,309 INFO L470 AbstractCegarLoop]: Abstraction has 20161 states and 34270 transitions. [2021-11-12 23:06:14,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 23:06:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 20161 states and 34270 transitions. [2021-11-12 23:06:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 23:06:14,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:14,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:14,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:14,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:14,537 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1005673769, now seen corresponding path program 1 times [2021-11-12 23:06:14,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:14,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716713755] [2021-11-12 23:06:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:14,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:14,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:14,540 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:14,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:06:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:06:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:06:15,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:06:16,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:16,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716713755] [2021-11-12 23:06:16,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716713755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:16,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:16,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:06:16,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935529397] [2021-11-12 23:06:16,229 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:16,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:06:16,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:06:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:06:16,230 INFO L87 Difference]: Start difference. First operand 20161 states and 34270 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:06:18,250 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 23:06:20,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:22,263 WARN L515 Checker$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 23:06:24,270 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 23:06:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:38,571 INFO L93 Difference]: Finished difference Result 70217 states and 129972 transitions. [2021-11-12 23:06:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:06:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) Word has length 145 [2021-11-12 23:06:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:39,219 INFO L225 Difference]: With dead ends: 70217 [2021-11-12 23:06:39,219 INFO L226 Difference]: Without dead ends: 50069 [2021-11-12 23:06:39,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:06:39,389 INFO L933 BasicCegarLoop]: 1884 mSDtfsCounter, 5542 mSDsluCounter, 2922 mSDsCounter, 0 mSdLazyCounter, 9499 mSolverCounterSat, 2166 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17905.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5656 SdHoareTripleChecker+Valid, 4806 SdHoareTripleChecker+Invalid, 11669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.66ms SdHoareTripleChecker+Time, 2166 IncrementalHoareTripleChecker+Valid, 9499 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19271.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:39,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5656 Valid, 4806 Invalid, 11669 Unknown, 0 Unchecked, 44.66ms Time], IncrementalHoareTripleChecker [2166 Valid, 9499 Invalid, 4 Unknown, 0 Unchecked, 19271.60ms Time] [2021-11-12 23:06:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50069 states. [2021-11-12 23:06:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50069 to 35116. [2021-11-12 23:06:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35116 states, 24643 states have (on average 1.5342287870794953) internal successors, (37808), 26180 states have internal predecessors, (37808), 9093 states have call successors, (9093), 934 states have call predecessors, (9093), 1379 states have return successors, (13405), 8855 states have call predecessors, (13405), 9059 states have call successors, (13405) [2021-11-12 23:06:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35116 states to 35116 states and 60306 transitions. [2021-11-12 23:06:43,047 INFO L78 Accepts]: Start accepts. Automaton has 35116 states and 60306 transitions. Word has length 145 [2021-11-12 23:06:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:43,048 INFO L470 AbstractCegarLoop]: Abstraction has 35116 states and 60306 transitions. [2021-11-12 23:06:43,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:06:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 35116 states and 60306 transitions. [2021-11-12 23:06:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 23:06:43,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:43,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:43,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:43,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:43,280 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:43,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:43,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1460810976, now seen corresponding path program 1 times [2021-11-12 23:06:43,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:43,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295715762] [2021-11-12 23:06:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:43,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:43,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:43,283 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:43,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:06:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:06:43,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:06:44,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:06:44,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:44,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295715762] [2021-11-12 23:06:44,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295715762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:44,659 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:44,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:06:44,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859880877] [2021-11-12 23:06:44,659 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:44,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:06:44,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:44,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:06:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:06:44,660 INFO L87 Difference]: Start difference. First operand 35116 states and 60306 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:06:46,680 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 23:06:48,687 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 23:06:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:59,530 INFO L93 Difference]: Finished difference Result 123222 states and 237907 transitions. [2021-11-12 23:06:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:06:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 146 [2021-11-12 23:06:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:00,456 INFO L225 Difference]: With dead ends: 123222 [2021-11-12 23:07:00,457 INFO L226 Difference]: Without dead ends: 88167 [2021-11-12 23:07:01,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:01,060 INFO L933 BasicCegarLoop]: 1746 mSDtfsCounter, 4490 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2793 mSolverCounterSat, 1297 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7679.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4604 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 4092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.01ms SdHoareTripleChecker+Time, 1297 IncrementalHoareTripleChecker+Valid, 2793 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8267.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:01,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4604 Valid, 2659 Invalid, 4092 Unknown, 0 Unchecked, 20.01ms Time], IncrementalHoareTripleChecker [1297 Valid, 2793 Invalid, 2 Unknown, 0 Unchecked, 8267.79ms Time] [2021-11-12 23:07:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88167 states. [2021-11-12 23:07:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88167 to 71340. [2021-11-12 23:07:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71340 states, 48753 states have (on average 1.5138350460484482) internal successors, (73804), 52108 states have internal predecessors, (73804), 19727 states have call successors, (19727), 1608 states have call predecessors, (19727), 2859 states have return successors, (30913), 19695 states have call predecessors, (30913), 19669 states have call successors, (30913) [2021-11-12 23:07:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71340 states to 71340 states and 124444 transitions. [2021-11-12 23:07:07,914 INFO L78 Accepts]: Start accepts. Automaton has 71340 states and 124444 transitions. Word has length 146 [2021-11-12 23:07:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:07,915 INFO L470 AbstractCegarLoop]: Abstraction has 71340 states and 124444 transitions. [2021-11-12 23:07:07,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:07:07,915 INFO L276 IsEmpty]: Start isEmpty. Operand 71340 states and 124444 transitions. [2021-11-12 23:07:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:07:07,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:07,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:07,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-12 23:07:08,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:08,136 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1263367898, now seen corresponding path program 1 times [2021-11-12 23:07:08,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:08,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209034074] [2021-11-12 23:07:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:08,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:08,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:08,138 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:08,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_deb5fec9-a091-4320-a739-975e4b0011e9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:07:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:07:08,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:07:09,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:07:09,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:09,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209034074] [2021-11-12 23:07:09,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209034074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:09,609 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:09,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:07:09,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535542064] [2021-11-12 23:07:09,609 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:09,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:07:09,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:07:09,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:07:09,611 INFO L87 Difference]: Start difference. First operand 71340 states and 124444 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-12 23:07:11,643 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 23:07:13,650 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 []