./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/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_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/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_af301373-27f1-4fd0-bb43-8aa6879dff05/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 a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:18,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:18,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:18,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:18,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:18,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:18,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:18,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:18,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:18,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:18,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:18,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:18,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:18,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:18,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:18,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:18,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:18,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:18,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:18,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:18,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:18,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:18,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:18,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:18,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:18,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:18,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:18,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:18,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:18,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:18,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:18,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:18,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:18,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:18,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:18,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:18,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:18,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:18,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:18,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:18,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:18,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:52:18,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:18,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:18,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:18,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:18,173 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:18,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:18,174 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:18,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:52:18,174 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:18,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:18,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:52:18,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:52:18,175 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:18,175 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:52:18,175 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:52:18,176 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:52:18,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:18,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:18,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:52:18,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:18,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:18,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:18,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:18,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:18,178 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:18,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:18,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:18,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:18,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:18,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:18,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:18,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:18,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:18,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:18,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:18,180 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:52:18,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:52:18,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:18,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:18,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:18,181 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_af301373-27f1-4fd0-bb43-8aa6879dff05/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb [2021-11-12 22:52:18,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:18,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:18,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:18,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:18,533 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:18,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2021-11-12 22:52:18,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data/c53294478/0a9a2b1f8fa940d59e499275186422ad/FLAG6435af3b2 [2021-11-12 22:52:19,269 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:19,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2021-11-12 22:52:19,314 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data/c53294478/0a9a2b1f8fa940d59e499275186422ad/FLAG6435af3b2 [2021-11-12 22:52:19,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data/c53294478/0a9a2b1f8fa940d59e499275186422ad [2021-11-12 22:52:19,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:19,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:19,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:19,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:19,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:19,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:19" (1/1) ... [2021-11-12 22:52:19,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599af9f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:19, skipping insertion in model container [2021-11-12 22:52:19,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:19" (1/1) ... [2021-11-12 22:52:19,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:52:19,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:20,108 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_af301373-27f1-4fd0-bb43-8aa6879dff05/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2021-11-12 22:52:20,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:20,185 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:52:20,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d7dc9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20, skipping insertion in model container [2021-11-12 22:52:20,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:20,187 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:52:20,189 INFO L158 Benchmark]: Toolchain (without parser) took 718.63ms. Allocated memory is still 107.0MB. Free memory was 83.7MB in the beginning and 69.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:52:20,191 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 81.8MB. Free memory was 59.2MB in the beginning and 59.1MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:52:20,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 715.63ms. Allocated memory is still 107.0MB. Free memory was 83.4MB in the beginning and 69.0MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:52:20,193 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 81.8MB. Free memory was 59.2MB in the beginning and 59.1MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 715.63ms. Allocated memory is still 107.0MB. Free memory was 83.4MB in the beginning and 69.0MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3164]: 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_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/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_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/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_af301373-27f1-4fd0-bb43-8aa6879dff05/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 a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:22,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:22,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:22,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:22,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:22,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:22,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:22,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:22,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:22,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:22,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:22,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:22,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:22,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:22,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:22,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:22,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:22,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:22,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:22,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:22,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:22,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:22,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:22,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:22,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:22,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:22,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:22,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:22,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:22,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:22,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:22,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:22,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:22,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:22,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:22,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:22,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:22,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:22,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:22,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:22,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:22,498 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:52:22,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:22,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:22,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:22,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:22,544 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:22,544 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:22,544 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:22,545 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:22,545 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:22,545 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:22,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:22,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:22,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:22,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:22,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:22,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:22,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:22,549 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:22,549 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:52:22,550 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:52:22,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:22,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:22,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:22,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:22,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:22,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:52:22,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:22,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:22,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:22,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:22,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:22,553 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:52:22,553 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:22,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:22,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:22,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:22,554 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_af301373-27f1-4fd0-bb43-8aa6879dff05/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb [2021-11-12 22:52:22,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:22,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:22,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:22,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:22,998 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:22,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2021-11-12 22:52:23,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data/3836e7afc/30a1211d08ac45dd814c3999da23e097/FLAGee18e5d32 [2021-11-12 22:52:23,861 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:23,862 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2021-11-12 22:52:23,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data/3836e7afc/30a1211d08ac45dd814c3999da23e097/FLAGee18e5d32 [2021-11-12 22:52:24,007 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/data/3836e7afc/30a1211d08ac45dd814c3999da23e097 [2021-11-12 22:52:24,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:24,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:24,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:24,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:24,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:24,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:24" (1/1) ... [2021-11-12 22:52:24,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48bf478b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:24, skipping insertion in model container [2021-11-12 22:52:24,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:24" (1/1) ... [2021-11-12 22:52:24,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:52:24,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:24,721 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_af301373-27f1-4fd0-bb43-8aa6879dff05/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2021-11-12 22:52:24,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:24,772 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:52:24,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:24,916 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_af301373-27f1-4fd0-bb43-8aa6879dff05/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2021-11-12 22:52:24,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:24,936 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:52:25,069 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_af301373-27f1-4fd0-bb43-8aa6879dff05/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2021-11-12 22:52:25,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:25,131 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:52:25,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25 WrapperNode [2021-11-12 22:52:25,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:25,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:25,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:52:25,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:52:25,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:25,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:52:25,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:52:25,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:52:25,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:52:25,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:52:25,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:52:25,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:52:25,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (1/1) ... [2021-11-12 22:52:25,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:25,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:25,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:52:25,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:52:25,462 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:52:25,463 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:52:25,464 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:52:25,464 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:52:25,464 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:52:25,465 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:52:25,465 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:52:25,465 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:52:25,465 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:52:25,465 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:52:25,465 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:52:25,465 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:52:25,465 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:52:25,466 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:52:25,466 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:52:25,466 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:52:25,466 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:52:25,466 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:52:25,466 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:52:25,466 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:52:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:52:25,467 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:52:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 22:52:25,467 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 22:52:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:52:25,467 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:52:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:52:25,467 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:52:25,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:52:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:52:25,468 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:52:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:52:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:52:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:52:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:52:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:52:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:52:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:52:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:52:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:52:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:52:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:52:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:52:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:52:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:52:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:52:25,471 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:52:25,471 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:52:25,472 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:52:25,472 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:52:25,473 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:52:25,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:52:25,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:52:25,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:52:25,475 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:52:25,475 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:52:29,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:52:29,508 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:52:29,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:29 BoogieIcfgContainer [2021-11-12 22:52:29,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:52:29,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:52:29,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:52:29,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:52:29,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:52:24" (1/3) ... [2021-11-12 22:52:29,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aebc325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:29, skipping insertion in model container [2021-11-12 22:52:29,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:25" (2/3) ... [2021-11-12 22:52:29,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aebc325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:29, skipping insertion in model container [2021-11-12 22:52:29,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:29" (3/3) ... [2021-11-12 22:52:29,522 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product31.cil.c [2021-11-12 22:52:29,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:52:29,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:52:29,593 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:52:29,604 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:52:29,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:52:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 596 states, 466 states have (on average 1.6802575107296138) internal successors, (783), 487 states have internal predecessors, (783), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 22:52:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:52:29,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:29,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:29,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1539098875, now seen corresponding path program 1 times [2021-11-12 22:52:29,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:29,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126784601] [2021-11-12 22:52:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:29,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:29,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:29,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:52:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:30,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:52:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:30,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:30,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:30,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126784601] [2021-11-12 22:52:30,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126784601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:30,820 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:30,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:52:30,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515033388] [2021-11-12 22:52:30,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:30,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:52:30,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:30,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:52:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:30,865 INFO L87 Difference]: Start difference. First operand has 596 states, 466 states have (on average 1.6802575107296138) internal successors, (783), 487 states have internal predecessors, (783), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:52:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:30,951 INFO L93 Difference]: Finished difference Result 617 states and 1017 transitions. [2021-11-12 22:52:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:52:30,953 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 104 [2021-11-12 22:52:30,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:30,976 INFO L225 Difference]: With dead ends: 617 [2021-11-12 22:52:30,977 INFO L226 Difference]: Without dead ends: 588 [2021-11-12 22:52:30,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:30,985 INFO L933 BasicCegarLoop]: 978 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, 978 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:30,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 10.91ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:52:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-12 22:52:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2021-11-12 22:52:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 460 states have (on average 1.6782608695652175) internal successors, (772), 479 states have internal predecessors, (772), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 22:52:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 971 transitions. [2021-11-12 22:52:31,083 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 971 transitions. Word has length 104 [2021-11-12 22:52:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:31,085 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 971 transitions. [2021-11-12 22:52:31,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-12 22:52:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 971 transitions. [2021-11-12 22:52:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:52:31,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:31,096 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:31,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 22:52:31,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:31,312 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:31,313 INFO L85 PathProgramCache]: Analyzing trace with hash -170598262, now seen corresponding path program 1 times [2021-11-12 22:52:31,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:31,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995333596] [2021-11-12 22:52:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:31,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:31,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:31,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:52:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:31,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:32,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:32,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:32,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995333596] [2021-11-12 22:52:32,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995333596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:32,601 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:32,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:52:32,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842298616] [2021-11-12 22:52:32,601 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:32,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:52:32,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:52:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:32,604 INFO L87 Difference]: Start difference. First operand 588 states and 971 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:52:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:32,797 INFO L93 Difference]: Finished difference Result 1160 states and 1920 transitions. [2021-11-12 22:52:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 106 [2021-11-12 22:52:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:32,806 INFO L225 Difference]: With dead ends: 1160 [2021-11-12 22:52:32,807 INFO L226 Difference]: Without dead ends: 588 [2021-11-12 22:52:32,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 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 22:52:32,817 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 30 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.99ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:32,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 2870 Invalid, 41 Unknown, 0 Unchecked, 23.99ms Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 58.48ms Time] [2021-11-12 22:52:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-12 22:52:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2021-11-12 22:52:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 460 states have (on average 1.6652173913043478) internal successors, (766), 479 states have internal predecessors, (766), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 22:52:32,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 965 transitions. [2021-11-12 22:52:32,901 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 965 transitions. Word has length 106 [2021-11-12 22:52:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:32,904 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 965 transitions. [2021-11-12 22:52:32,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:52:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 965 transitions. [2021-11-12 22:52:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:52:32,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:32,919 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:32,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:33,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:33,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:33,146 INFO L85 PathProgramCache]: Analyzing trace with hash -179292723, now seen corresponding path program 1 times [2021-11-12 22:52:33,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:33,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950494098] [2021-11-12 22:52:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:33,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:33,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:33,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:33,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:52:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:52:33,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:33,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:34,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:34,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950494098] [2021-11-12 22:52:34,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950494098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:34,394 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:34,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:52:34,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043856406] [2021-11-12 22:52:34,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:34,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:52:34,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:52:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:52:34,396 INFO L87 Difference]: Start difference. First operand 588 states and 965 transitions. Second operand has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:52:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:34,625 INFO L93 Difference]: Finished difference Result 1118 states and 1837 transitions. [2021-11-12 22:52:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:52:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 111 [2021-11-12 22:52:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:34,635 INFO L225 Difference]: With dead ends: 1118 [2021-11-12 22:52:34,636 INFO L226 Difference]: Without dead ends: 582 [2021-11-12 22:52:34,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:34,643 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 117 mSDsluCounter, 7518 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 8470 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:34,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 8470 Invalid, 106 Unknown, 0 Unchecked, 24.90ms Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 120.42ms Time] [2021-11-12 22:52:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-12 22:52:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-11-12 22:52:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 454 states have (on average 1.658590308370044) internal successors, (753), 473 states have internal predecessors, (753), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 22:52:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 952 transitions. [2021-11-12 22:52:34,687 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 952 transitions. Word has length 111 [2021-11-12 22:52:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:34,688 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 952 transitions. [2021-11-12 22:52:34,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:52:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 952 transitions. [2021-11-12 22:52:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:52:34,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:34,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:34,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:34,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:34,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1210582205, now seen corresponding path program 1 times [2021-11-12 22:52:34,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:34,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308775324] [2021-11-12 22:52:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:34,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:34,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:34,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:52:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:35,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:35,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:35,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:35,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:35,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308775324] [2021-11-12 22:52:35,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308775324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:35,967 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:35,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:52:35,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297089173] [2021-11-12 22:52:35,968 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:35,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:52:35,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:35,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:52:35,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:35,970 INFO L87 Difference]: Start difference. First operand 582 states and 952 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:52:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:36,163 INFO L93 Difference]: Finished difference Result 1121 states and 1838 transitions. [2021-11-12 22:52:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:52:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 112 [2021-11-12 22:52:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:36,169 INFO L225 Difference]: With dead ends: 1121 [2021-11-12 22:52:36,170 INFO L226 Difference]: Without dead ends: 582 [2021-11-12 22:52:36,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:52:36,174 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 194 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:36,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 2705 Invalid, 146 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [23 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 140.31ms Time] [2021-11-12 22:52:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-12 22:52:36,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2021-11-12 22:52:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 454 states have (on average 1.605726872246696) internal successors, (729), 473 states have internal predecessors, (729), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 22:52:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 928 transitions. [2021-11-12 22:52:36,202 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 928 transitions. Word has length 112 [2021-11-12 22:52:36,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:36,202 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 928 transitions. [2021-11-12 22:52:36,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:52:36,203 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 928 transitions. [2021-11-12 22:52:36,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:52:36,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:36,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:36,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:36,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:36,423 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:36,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1655596120, now seen corresponding path program 1 times [2021-11-12 22:52:36,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:36,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30544149] [2021-11-12 22:52:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:36,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:36,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:36,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:36,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:52:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:36,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:52:36,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:37,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:37,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:37,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30544149] [2021-11-12 22:52:37,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30544149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:37,600 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:37,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:52:37,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348493976] [2021-11-12 22:52:37,601 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:37,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:52:37,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:52:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:52:37,602 INFO L87 Difference]: Start difference. First operand 582 states and 928 transitions. Second operand has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:52:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:37,731 INFO L93 Difference]: Finished difference Result 1112 states and 1800 transitions. [2021-11-12 22:52:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:52:37,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 114 [2021-11-12 22:52:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:37,738 INFO L225 Difference]: With dead ends: 1112 [2021-11-12 22:52:37,738 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 22:52:37,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:52:37,742 INFO L933 BasicCegarLoop]: 916 mSDtfsCounter, 89 mSDsluCounter, 4517 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5433 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:37,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 5433 Invalid, 57 Unknown, 0 Unchecked, 9.82ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 67.98ms Time] [2021-11-12 22:52:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 22:52:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 22:52:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 433 states have (on average 1.625866050808314) internal successors, (704), 452 states have internal predecessors, (704), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 22:52:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 903 transitions. [2021-11-12 22:52:37,769 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 903 transitions. Word has length 114 [2021-11-12 22:52:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:37,770 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 903 transitions. [2021-11-12 22:52:37,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:52:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 903 transitions. [2021-11-12 22:52:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:52:37,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:37,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:37,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:37,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:37,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:37,992 INFO L85 PathProgramCache]: Analyzing trace with hash 147304250, now seen corresponding path program 1 times [2021-11-12 22:52:37,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:37,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694196661] [2021-11-12 22:52:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:37,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:37,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:37,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:38,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:52:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:38,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:52:39,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:39,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694196661] [2021-11-12 22:52:39,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694196661] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:39,320 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:39,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:52:39,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505484095] [2021-11-12 22:52:39,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:39,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:52:39,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:52:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:52:39,322 INFO L87 Difference]: Start difference. First operand 561 states and 903 transitions. Second operand has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:52:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:39,563 INFO L93 Difference]: Finished difference Result 1085 states and 1764 transitions. [2021-11-12 22:52:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:52:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-12 22:52:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:39,569 INFO L225 Difference]: With dead ends: 1085 [2021-11-12 22:52:39,569 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 22:52:39,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:52:39,574 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 44 mSDsluCounter, 7958 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8846 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:39,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 8846 Invalid, 116 Unknown, 0 Unchecked, 33.99ms Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 129.44ms Time] [2021-11-12 22:52:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 22:52:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 22:52:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 433 states have (on average 1.6235565819861433) internal successors, (703), 452 states have internal predecessors, (703), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 22:52:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 902 transitions. [2021-11-12 22:52:39,598 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 902 transitions. Word has length 117 [2021-11-12 22:52:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:39,599 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 902 transitions. [2021-11-12 22:52:39,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:52:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 902 transitions. [2021-11-12 22:52:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:52:39,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:39,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:39,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:39,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:39,830 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1053607998, now seen corresponding path program 1 times [2021-11-12 22:52:39,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:39,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119309469] [2021-11-12 22:52:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:39,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:39,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:39,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:52:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:40,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:41,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:41,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119309469] [2021-11-12 22:52:41,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119309469] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:41,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:41,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:52:41,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575760664] [2021-11-12 22:52:41,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:41,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:41,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:41,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:52:41,149 INFO L87 Difference]: Start difference. First operand 561 states and 902 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:52:43,181 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:45,189 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:46,190 INFO L93 Difference]: Finished difference Result 1081 states and 1784 transitions. [2021-11-12 22:52:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:52:46,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 118 [2021-11-12 22:52:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:46,196 INFO L225 Difference]: With dead ends: 1081 [2021-11-12 22:52:46,196 INFO L226 Difference]: Without dead ends: 565 [2021-11-12 22:52:46,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:52:46,206 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 853 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4835.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.67ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4960.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:46,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 2247 Invalid, 461 Unknown, 0 Unchecked, 10.67ms Time], IncrementalHoareTripleChecker [16 Valid, 443 Invalid, 2 Unknown, 0 Unchecked, 4960.04ms Time] [2021-11-12 22:52:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-12 22:52:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-12 22:52:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 436 states have (on average 1.6192660550458715) internal successors, (706), 455 states have internal predecessors, (706), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-12 22:52:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 906 transitions. [2021-11-12 22:52:46,241 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 906 transitions. Word has length 118 [2021-11-12 22:52:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:46,241 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 906 transitions. [2021-11-12 22:52:46,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:52:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 906 transitions. [2021-11-12 22:52:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:52:46,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:46,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:46,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:46,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:46,468 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash 366859364, now seen corresponding path program 1 times [2021-11-12 22:52:46,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:46,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965828747] [2021-11-12 22:52:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:46,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:46,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:46,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:46,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:46,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:47,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:47,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:47,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965828747] [2021-11-12 22:52:47,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965828747] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:47,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:47,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:52:47,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625131960] [2021-11-12 22:52:47,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:47,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:47,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:52:47,820 INFO L87 Difference]: Start difference. First operand 565 states and 906 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:52:49,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:51,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:52,810 INFO L93 Difference]: Finished difference Result 1090 states and 1791 transitions. [2021-11-12 22:52:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:52:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 120 [2021-11-12 22:52:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:52,818 INFO L225 Difference]: With dead ends: 1090 [2021-11-12 22:52:52,818 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 22:52:52,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:52:52,823 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 841 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4788.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.24ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4912.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:52,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 2248 Invalid, 463 Unknown, 0 Unchecked, 10.24ms Time], IncrementalHoareTripleChecker [14 Valid, 447 Invalid, 2 Unknown, 0 Unchecked, 4912.83ms Time] [2021-11-12 22:52:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 22:52:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-12 22:52:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 440 states have (on average 1.6136363636363635) internal successors, (710), 459 states have internal predecessors, (710), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-12 22:52:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 911 transitions. [2021-11-12 22:52:52,854 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 911 transitions. Word has length 120 [2021-11-12 22:52:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:52,855 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 911 transitions. [2021-11-12 22:52:52,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:52:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 911 transitions. [2021-11-12 22:52:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:52:52,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:52,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:52,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:53,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:53,088 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash -206830014, now seen corresponding path program 1 times [2021-11-12 22:52:53,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:53,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405551303] [2021-11-12 22:52:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:53,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:53,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:53,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:52:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:53,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:53,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:53,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:52:54,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:54,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405551303] [2021-11-12 22:52:54,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405551303] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:54,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:54,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:52:54,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489608226] [2021-11-12 22:52:54,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:54,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:54,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:52:54,464 INFO L87 Difference]: Start difference. First operand 570 states and 911 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:52:56,486 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:58,493 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:59,437 INFO L93 Difference]: Finished difference Result 1101 states and 1800 transitions. [2021-11-12 22:52:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:52:59,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 122 [2021-11-12 22:52:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:59,446 INFO L225 Difference]: With dead ends: 1101 [2021-11-12 22:52:59,447 INFO L226 Difference]: Without dead ends: 576 [2021-11-12 22:52:59,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:52:59,467 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 851 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4768.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.24ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4899.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:59,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 2248 Invalid, 462 Unknown, 0 Unchecked, 10.24ms Time], IncrementalHoareTripleChecker [12 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 4899.42ms Time] [2021-11-12 22:52:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-12 22:52:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-12 22:52:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 445 states have (on average 1.6067415730337078) internal successors, (715), 464 states have internal predecessors, (715), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 95 states have call predecessors, (100), 97 states have call successors, (100) [2021-11-12 22:52:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 917 transitions. [2021-11-12 22:52:59,500 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 917 transitions. Word has length 122 [2021-11-12 22:52:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:59,501 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 917 transitions. [2021-11-12 22:52:59,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:52:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 917 transitions. [2021-11-12 22:52:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 22:52:59,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:59,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:59,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:59,725 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash 645657052, now seen corresponding path program 1 times [2021-11-12 22:52:59,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:59,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988249662] [2021-11-12 22:52:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:59,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:59,727 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:59,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:53:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:53:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:00,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:53:01,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:01,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988249662] [2021-11-12 22:53:01,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988249662] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:53:01,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:53:01,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:53:01,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914169503] [2021-11-12 22:53:01,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:01,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:01,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:53:01,078 INFO L87 Difference]: Start difference. First operand 576 states and 917 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:53:03,110 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:05,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:06,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:06,085 INFO L93 Difference]: Finished difference Result 1114 states and 1811 transitions. [2021-11-12 22:53:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:06,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2021-11-12 22:53:06,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:06,093 INFO L225 Difference]: With dead ends: 1114 [2021-11-12 22:53:06,093 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 22:53:06,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:53:06,098 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 851 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4796.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.27ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4938.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:06,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 2248 Invalid, 461 Unknown, 0 Unchecked, 8.27ms Time], IncrementalHoareTripleChecker [10 Valid, 449 Invalid, 2 Unknown, 0 Unchecked, 4938.18ms Time] [2021-11-12 22:53:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 22:53:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 22:53:06,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 451 states have (on average 1.598669623059867) internal successors, (721), 470 states have internal predecessors, (721), 102 states have call successors, (102), 30 states have call predecessors, (102), 29 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-12 22:53:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 924 transitions. [2021-11-12 22:53:06,127 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 924 transitions. Word has length 124 [2021-11-12 22:53:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:06,127 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 924 transitions. [2021-11-12 22:53:06,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:53:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 924 transitions. [2021-11-12 22:53:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:53:06,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:06,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:06,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:06,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:06,348 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:06,348 INFO L85 PathProgramCache]: Analyzing trace with hash -746028350, now seen corresponding path program 1 times [2021-11-12 22:53:06,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:06,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530599999] [2021-11-12 22:53:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:06,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:06,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:06,350 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:06,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:53:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:53:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:53:07,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:08,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:08,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530599999] [2021-11-12 22:53:08,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530599999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:08,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [768614161] [2021-11-12 22:53:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:08,455 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:08,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:08,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:08,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:53:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:08,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:08,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:53:09,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:09,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [768614161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:09,369 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:09,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-12 22:53:09,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341121658] [2021-11-12 22:53:09,369 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:09,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:09,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:53:09,371 INFO L87 Difference]: Start difference. First operand 583 states and 924 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:53:11,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:11,473 INFO L93 Difference]: Finished difference Result 1654 states and 2681 transitions. [2021-11-12 22:53:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 126 [2021-11-12 22:53:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:11,485 INFO L225 Difference]: With dead ends: 1654 [2021-11-12 22:53:11,486 INFO L226 Difference]: Without dead ends: 1116 [2021-11-12 22:53:11,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:53:11,490 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 846 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2039.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.14ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2054.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:11,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 2525 Invalid, 9 Unknown, 0 Unchecked, 6.14ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 2054.71ms Time] [2021-11-12 22:53:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-11-12 22:53:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1096. [2021-11-12 22:53:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 851 states have (on average 1.6204465334900118) internal successors, (1379), 883 states have internal predecessors, (1379), 190 states have call successors, (190), 54 states have call predecessors, (190), 54 states have return successors, (199), 184 states have call predecessors, (199), 185 states have call successors, (199) [2021-11-12 22:53:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1768 transitions. [2021-11-12 22:53:11,546 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1768 transitions. Word has length 126 [2021-11-12 22:53:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:11,547 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1768 transitions. [2021-11-12 22:53:11,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:53:11,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1768 transitions. [2021-11-12 22:53:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:53:11,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:11,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:11,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:11,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:11,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:11,969 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:11,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1177199684, now seen corresponding path program 1 times [2021-11-12 22:53:11,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:11,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678394639] [2021-11-12 22:53:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:11,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:11,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:11,970 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:11,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:53:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:53:12,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:53:12,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:13,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:13,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678394639] [2021-11-12 22:53:13,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678394639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:13,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [296577387] [2021-11-12 22:53:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:13,798 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:13,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:13,798 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:13,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:53:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:14,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:14,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:14,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [296577387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:14,879 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:14,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:53:14,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720165231] [2021-11-12 22:53:14,880 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:14,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:14,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:53:14,881 INFO L87 Difference]: Start difference. First operand 1096 states and 1768 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:16,908 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:19,256 INFO L93 Difference]: Finished difference Result 3470 states and 5725 transitions. [2021-11-12 22:53:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:19,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 126 [2021-11-12 22:53:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:19,288 INFO L225 Difference]: With dead ends: 3470 [2021-11-12 22:53:19,288 INFO L226 Difference]: Without dead ends: 2419 [2021-11-12 22:53:19,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:53:19,297 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 1989 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 454 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3830.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.00ms SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4202.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:19,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2073 Valid, 1615 Invalid, 1459 Unknown, 0 Unchecked, 16.00ms Time], IncrementalHoareTripleChecker [454 Valid, 1004 Invalid, 1 Unknown, 0 Unchecked, 4202.90ms Time] [2021-11-12 22:53:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-11-12 22:53:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2351. [2021-11-12 22:53:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 1797 states have (on average 1.6277128547579298) internal successors, (2925), 1871 states have internal predecessors, (2925), 442 states have call successors, (442), 103 states have call predecessors, (442), 111 states have return successors, (515), 438 states have call predecessors, (515), 437 states have call successors, (515) [2021-11-12 22:53:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 3882 transitions. [2021-11-12 22:53:19,445 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 3882 transitions. Word has length 126 [2021-11-12 22:53:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:19,446 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 3882 transitions. [2021-11-12 22:53:19,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 3882 transitions. [2021-11-12 22:53:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:53:19,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:19,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:19,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:19,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:19,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:19,873 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2133302312, now seen corresponding path program 1 times [2021-11-12 22:53:19,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:19,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843705894] [2021-11-12 22:53:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:19,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:19,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:19,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:19,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:53:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:53:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:53:20,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:21,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:21,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843705894] [2021-11-12 22:53:21,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843705894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:21,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1920087193] [2021-11-12 22:53:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:21,641 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:21,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:21,648 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:21,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:53:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:22,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:22,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1920087193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:22,774 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:22,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:53:22,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572792274] [2021-11-12 22:53:22,775 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:22,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:22,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:53:22,776 INFO L87 Difference]: Start difference. First operand 2351 states and 3882 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:24,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:27,371 INFO L93 Difference]: Finished difference Result 7743 states and 13142 transitions. [2021-11-12 22:53:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 127 [2021-11-12 22:53:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:27,427 INFO L225 Difference]: With dead ends: 7743 [2021-11-12 22:53:27,427 INFO L226 Difference]: Without dead ends: 5437 [2021-11-12 22:53:27,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:53:27,447 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 2062 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 475 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3965.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.56ms SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4287.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:27,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2145 Valid, 1414 Invalid, 1435 Unknown, 0 Unchecked, 14.56ms Time], IncrementalHoareTripleChecker [475 Valid, 959 Invalid, 1 Unknown, 0 Unchecked, 4287.37ms Time] [2021-11-12 22:53:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2021-11-12 22:53:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 5230. [2021-11-12 22:53:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5230 states, 3922 states have (on average 1.6264660887302396) internal successors, (6379), 4104 states have internal predecessors, (6379), 1072 states have call successors, (1072), 201 states have call predecessors, (1072), 235 states have return successors, (1415), 1076 states have call predecessors, (1415), 1067 states have call successors, (1415) [2021-11-12 22:53:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5230 states to 5230 states and 8866 transitions. [2021-11-12 22:53:27,854 INFO L78 Accepts]: Start accepts. Automaton has 5230 states and 8866 transitions. Word has length 127 [2021-11-12 22:53:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:27,855 INFO L470 AbstractCegarLoop]: Abstraction has 5230 states and 8866 transitions. [2021-11-12 22:53:27,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 5230 states and 8866 transitions. [2021-11-12 22:53:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:53:27,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:27,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:27,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:28,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:28,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:28,266 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1707716614, now seen corresponding path program 1 times [2021-11-12 22:53:28,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:28,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675940204] [2021-11-12 22:53:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:28,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:28,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:28,268 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:28,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:53:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:28,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:53:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:53:29,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:30,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:30,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675940204] [2021-11-12 22:53:30,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675940204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:30,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751879942] [2021-11-12 22:53:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:30,065 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:30,076 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:30,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:53:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:30,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:30,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:31,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751879942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:31,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:31,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:53:31,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849645602] [2021-11-12 22:53:31,183 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:31,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:31,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:53:31,184 INFO L87 Difference]: Start difference. First operand 5230 states and 8866 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:33,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:36,228 INFO L93 Difference]: Finished difference Result 17714 states and 31335 transitions. [2021-11-12 22:53:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:36,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 128 [2021-11-12 22:53:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:36,380 INFO L225 Difference]: With dead ends: 17714 [2021-11-12 22:53:36,380 INFO L226 Difference]: Without dead ends: 12529 [2021-11-12 22:53:36,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:53:36,425 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 1980 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 464 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4101.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2062 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.97ms SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4417.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:36,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2062 Valid, 1555 Invalid, 1464 Unknown, 0 Unchecked, 13.97ms Time], IncrementalHoareTripleChecker [464 Valid, 999 Invalid, 1 Unknown, 0 Unchecked, 4417.62ms Time] [2021-11-12 22:53:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12529 states. [2021-11-12 22:53:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12529 to 11893. [2021-11-12 22:53:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11893 states, 8727 states have (on average 1.6192276841984645) internal successors, (14131), 9185 states have internal predecessors, (14131), 2660 states have call successors, (2660), 397 states have call predecessors, (2660), 505 states have return successors, (4046), 2692 states have call predecessors, (4046), 2655 states have call successors, (4046) [2021-11-12 22:53:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11893 states to 11893 states and 20837 transitions. [2021-11-12 22:53:37,439 INFO L78 Accepts]: Start accepts. Automaton has 11893 states and 20837 transitions. Word has length 128 [2021-11-12 22:53:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:37,440 INFO L470 AbstractCegarLoop]: Abstraction has 11893 states and 20837 transitions. [2021-11-12 22:53:37,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 11893 states and 20837 transitions. [2021-11-12 22:53:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:53:37,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:37,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:37,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:37,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:37,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:37,850 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1399465770, now seen corresponding path program 1 times [2021-11-12 22:53:37,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:37,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090572896] [2021-11-12 22:53:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:37,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:37,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:37,852 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:37,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:53:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:38,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:53:38,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:53:38,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:39,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:39,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090572896] [2021-11-12 22:53:39,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090572896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:39,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [296086095] [2021-11-12 22:53:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:39,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:39,701 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:39,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:53:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:40,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:40,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [296086095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:40,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:40,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:53:40,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367344371] [2021-11-12 22:53:40,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:40,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:40,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:53:40,836 INFO L87 Difference]: Start difference. First operand 11893 states and 20837 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:42,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:45,997 INFO L93 Difference]: Finished difference Result 40975 states and 76892 transitions. [2021-11-12 22:53:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 129 [2021-11-12 22:53:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:46,379 INFO L225 Difference]: With dead ends: 40975 [2021-11-12 22:53:46,379 INFO L226 Difference]: Without dead ends: 29127 [2021-11-12 22:53:46,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:53:46,450 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 3251 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 829 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3678.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3332 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.65ms SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3989.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:46,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3332 Valid, 1300 Invalid, 1727 Unknown, 0 Unchecked, 12.65ms Time], IncrementalHoareTripleChecker [829 Valid, 897 Invalid, 1 Unknown, 0 Unchecked, 3989.05ms Time] [2021-11-12 22:53:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29127 states. [2021-11-12 22:53:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29127 to 27644. [2021-11-12 22:53:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27644 states, 19816 states have (on average 1.6079430763019782) internal successors, (31863), 20982 states have internal predecessors, (31863), 6728 states have call successors, (6728), 789 states have call predecessors, (6728), 1099 states have return successors, (12045), 6852 states have call predecessors, (12045), 6723 states have call successors, (12045) [2021-11-12 22:53:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27644 states to 27644 states and 50636 transitions. [2021-11-12 22:53:48,882 INFO L78 Accepts]: Start accepts. Automaton has 27644 states and 50636 transitions. Word has length 129 [2021-11-12 22:53:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:48,883 INFO L470 AbstractCegarLoop]: Abstraction has 27644 states and 50636 transitions. [2021-11-12 22:53:48,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 27644 states and 50636 transitions. [2021-11-12 22:53:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:53:48,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:48,888 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:48,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 22:53:49,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:49,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:49,292 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash 433628104, now seen corresponding path program 1 times [2021-11-12 22:53:49,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:49,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608113914] [2021-11-12 22:53:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:49,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:49,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:49,294 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:49,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:53:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:49,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:53:49,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:53:50,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:53:51,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:51,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608113914] [2021-11-12 22:53:51,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608113914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:51,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305834926] [2021-11-12 22:53:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:51,022 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:51,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:51,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:51,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:53:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:51,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:51,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:51,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:53:52,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [305834926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:52,342 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:52,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:53:52,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892397334] [2021-11-12 22:53:52,342 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:52,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:52,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:53:52,343 INFO L87 Difference]: Start difference. First operand 27644 states and 50636 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:53:54,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:59,756 INFO L93 Difference]: Finished difference Result 96106 states and 196824 transitions. [2021-11-12 22:53:59,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:59,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 130 [2021-11-12 22:53:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:00,626 INFO L225 Difference]: With dead ends: 96106 [2021-11-12 22:54:00,626 INFO L226 Difference]: Without dead ends: 68497 [2021-11-12 22:54:00,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:54:00,806 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 1948 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 462 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3910.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.01ms SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4201.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:00,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 1651 Invalid, 1456 Unknown, 0 Unchecked, 12.01ms Time], IncrementalHoareTripleChecker [462 Valid, 993 Invalid, 1 Unknown, 0 Unchecked, 4201.82ms Time] [2021-11-12 22:54:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68497 states. [2021-11-12 22:54:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68497 to 65825. [2021-11-12 22:54:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65825 states, 46086 states have (on average 1.5939330816299961) internal successors, (73458), 49080 states have internal predecessors, (73458), 17312 states have call successors, (17312), 1571 states have call predecessors, (17312), 2426 states have return successors, (37435), 17727 states have call predecessors, (37435), 17307 states have call successors, (37435) [2021-11-12 22:54:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65825 states to 65825 states and 128205 transitions. [2021-11-12 22:54:07,110 INFO L78 Accepts]: Start accepts. Automaton has 65825 states and 128205 transitions. Word has length 130 [2021-11-12 22:54:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:07,112 INFO L470 AbstractCegarLoop]: Abstraction has 65825 states and 128205 transitions. [2021-11-12 22:54:07,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 22:54:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 65825 states and 128205 transitions. [2021-11-12 22:54:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 22:54:07,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:07,139 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:07,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:07,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:07,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:07,558 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1225149314, now seen corresponding path program 1 times [2021-11-12 22:54:07,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:07,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486650734] [2021-11-12 22:54:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:07,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:07,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:07,560 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:07,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af301373-27f1-4fd0-bb43-8aa6879dff05/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:54:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:54:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:54:08,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-12 22:54:09,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:09,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486650734] [2021-11-12 22:54:09,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486650734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:09,647 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:09,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-12 22:54:09,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978191561] [2021-11-12 22:54:09,647 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:09,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:54:09,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:54:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:54:09,649 INFO L87 Difference]: Start difference. First operand 65825 states and 128205 transitions. Second operand has 16 states, 16 states have (on average 9.0625) internal successors, (145), 12 states have internal predecessors, (145), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-12 22:54:11,683 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:13,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:15,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:17,716 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:19,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []