./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/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_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/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_b9ae1800-08dd-4d01-b224-cb4495e4740e/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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:39:37,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:39:37,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:39:37,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:39:37,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:39:37,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:39:37,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:39:37,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:39:37,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:39:38,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:39:38,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:39:38,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:39:38,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:39:38,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:39:38,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:39:38,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:39:38,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:39:38,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:39:38,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:39:38,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:39:38,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:39:38,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:39:38,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:39:38,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:39:38,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:39:38,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:39:38,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:39:38,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:39:38,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:39:38,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:39:38,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:39:38,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:39:38,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:39:38,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:39:38,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:39:38,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:39:38,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:39:38,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:39:38,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:39:38,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:39:38,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:39:38,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:39:38,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:39:38,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:39:38,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:39:38,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:39:38,105 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:39:38,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:39:38,106 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:39:38,106 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:39:38,106 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:39:38,106 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:39:38,107 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:39:38,108 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:39:38,108 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:39:38,108 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:39:38,108 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:39:38,109 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:39:38,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:39:38,110 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:39:38,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:39:38,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:39:38,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:39:38,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:39:38,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:39:38,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:39:38,112 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:39:38,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:39:38,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:39:38,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:39:38,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:39:38,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:39:38,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:39:38,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:39:38,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:39:38,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:39:38,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:39:38,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:39:38,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:39:38,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:39:38,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:39:38,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:39:38,117 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_b9ae1800-08dd-4d01-b224-cb4495e4740e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-13 02:39:38,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:39:38,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:39:38,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:39:38,454 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:39:38,455 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:39:38,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-13 02:39:38,522 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data/17c4598ac/2b37420a6a0545ac97f616fd9b14f31c/FLAG303bd2a84 [2021-11-13 02:39:39,147 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:39:39,147 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-13 02:39:39,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data/17c4598ac/2b37420a6a0545ac97f616fd9b14f31c/FLAG303bd2a84 [2021-11-13 02:39:39,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data/17c4598ac/2b37420a6a0545ac97f616fd9b14f31c [2021-11-13 02:39:39,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:39:39,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:39:39,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:39:39,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:39:39,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:39:39,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:39:39" (1/1) ... [2021-11-13 02:39:39,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73c3b0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:39, skipping insertion in model container [2021-11-13 02:39:39,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:39:39" (1/1) ... [2021-11-13 02:39:39,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:39:39,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:39:39,644 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_b9ae1800-08dd-4d01-b224-cb4495e4740e/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-13 02:39:39,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:39:39,972 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) [2021-11-13 02:39:39,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2482f1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:39, skipping insertion in model container [2021-11-13 02:39:39,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:39:39,973 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:39:39,975 INFO L158 Benchmark]: Toolchain (without parser) took 596.15ms. Allocated memory is still 109.1MB. Free memory was 79.0MB in the beginning and 51.9MB in the end (delta: 27.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-13 02:39:39,976 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 75.5MB. Free memory is still 42.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:39:39,977 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.87ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 51.9MB in the end (delta: 26.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-13 02:39:39,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 75.5MB. Free memory is still 42.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 593.87ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 51.9MB in the end (delta: 26.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2095]: 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_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/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_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/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_b9ae1800-08dd-4d01-b224-cb4495e4740e/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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:39:42,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:39:42,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:39:42,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:39:42,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:39:42,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:39:42,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:39:42,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:39:42,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:39:42,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:39:42,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:39:42,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:39:42,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:39:42,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:39:42,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:39:42,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:39:42,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:39:42,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:39:42,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:39:42,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:39:42,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:39:42,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:39:42,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:39:42,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:39:42,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:39:42,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:39:42,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:39:42,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:39:42,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:39:42,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:39:42,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:39:42,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:39:42,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:39:42,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:39:42,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:39:42,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:39:42,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:39:42,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:39:42,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:39:42,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:39:42,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:39:42,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:39:42,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:39:42,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:39:42,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:39:42,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:39:42,536 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:39:42,536 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:39:42,537 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:39:42,537 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:39:42,537 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:39:42,537 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:39:42,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:39:42,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:39:42,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:39:42,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:39:42,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:39:42,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:39:42,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:39:42,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:39:42,542 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:39:42,542 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:39:42,542 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:39:42,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:39:42,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:39:42,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:39:42,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:39:42,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:39:42,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:39:42,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:39:42,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:39:42,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:39:42,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:39:42,545 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:39:42,545 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:42,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:39:42,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:39:42,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:39:42,546 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_b9ae1800-08dd-4d01-b224-cb4495e4740e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-13 02:39:42,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:39:42,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:39:42,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:39:42,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:39:42,972 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:39:42,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-13 02:39:43,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data/69f73aab2/8c2eb5f2c1434925b1e9b1afce80a8d5/FLAGb81624f75 [2021-11-13 02:39:43,787 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:39:43,788 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-13 02:39:43,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data/69f73aab2/8c2eb5f2c1434925b1e9b1afce80a8d5/FLAGb81624f75 [2021-11-13 02:39:43,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/data/69f73aab2/8c2eb5f2c1434925b1e9b1afce80a8d5 [2021-11-13 02:39:43,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:39:43,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:39:43,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:39:43,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:39:43,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:39:43,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:39:43" (1/1) ... [2021-11-13 02:39:43,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409e24a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:43, skipping insertion in model container [2021-11-13 02:39:43,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:39:43" (1/1) ... [2021-11-13 02:39:43,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:39:44,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:39:44,270 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_b9ae1800-08dd-4d01-b224-cb4495e4740e/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-13 02:39:44,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:39:44,663 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:39:44,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:39:44,688 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_b9ae1800-08dd-4d01-b224-cb4495e4740e/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-13 02:39:44,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:39:44,860 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:39:44,872 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_b9ae1800-08dd-4d01-b224-cb4495e4740e/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-13 02:39:44,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:39:45,016 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:39:45,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45 WrapperNode [2021-11-13 02:39:45,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:39:45,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:39:45,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:39:45,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:39:45,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:39:45,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:39:45,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:39:45,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:39:45,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:39:45,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:39:45,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:39:45,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:39:45,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (1/1) ... [2021-11-13 02:39:45,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:39:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:39:45,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:39:45,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:39:45,402 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 02:39:45,406 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 02:39:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-13 02:39:45,407 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-13 02:39:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:39:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 02:39:45,407 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 02:39:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-13 02:39:45,407 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-13 02:39:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 02:39:45,408 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 02:39:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-13 02:39:45,408 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-13 02:39:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 02:39:45,408 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 02:39:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 02:39:45,408 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 02:39:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 02:39:45,409 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 02:39:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 02:39:45,409 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 02:39:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 02:39:45,409 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 02:39:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 02:39:45,410 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 02:39:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:39:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-13 02:39:45,410 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-13 02:39:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 02:39:45,410 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 02:39:45,411 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-13 02:39:45,411 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-13 02:39:45,411 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 02:39:45,411 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 02:39:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 02:39:45,412 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 02:39:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 02:39:45,412 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 02:39:45,412 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 02:39:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 02:39:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 02:39:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 02:39:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 02:39:45,413 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 02:39:45,413 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 02:39:45,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 02:39:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:39:45,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:39:45,414 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 02:39:45,415 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 02:39:49,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:39:49,338 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:39:49,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:39:49 BoogieIcfgContainer [2021-11-13 02:39:49,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:39:49,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:39:49,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:39:49,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:39:49,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:39:43" (1/3) ... [2021-11-13 02:39:49,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b595442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:39:49, skipping insertion in model container [2021-11-13 02:39:49,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:39:45" (2/3) ... [2021-11-13 02:39:49,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b595442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:39:49, skipping insertion in model container [2021-11-13 02:39:49,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:39:49" (3/3) ... [2021-11-13 02:39:49,351 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2021-11-13 02:39:49,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:39:49,357 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:39:49,410 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:39:49,418 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 [2021-11-13 02:39:49,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:39:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 541 states, 423 states have (on average 1.6784869976359338) internal successors, (710), 439 states have internal predecessors, (710), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:39:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 02:39:49,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:49,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:39:49,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1734862310, now seen corresponding path program 1 times [2021-11-13 02:39:49,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:49,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866065426] [2021-11-13 02:39:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:49,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:49,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:49,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:49,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:39:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:39:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:50,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:50,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:50,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866065426] [2021-11-13 02:39:50,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866065426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:50,938 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:50,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:39:50,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670417674] [2021-11-13 02:39:50,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:50,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:39:50,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:39:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:39:50,976 INFO L87 Difference]: Start difference. First operand has 541 states, 423 states have (on average 1.6784869976359338) internal successors, (710), 439 states have internal predecessors, (710), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 02:39:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:51,211 INFO L93 Difference]: Finished difference Result 1077 states and 1794 transitions. [2021-11-13 02:39:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:39:51,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 101 [2021-11-13 02:39:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:51,248 INFO L225 Difference]: With dead ends: 1077 [2021-11-13 02:39:51,248 INFO L226 Difference]: Without dead ends: 536 [2021-11-13 02:39:51,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:39:51,268 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 16 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2628 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.60ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.85ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:51,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 2628 Invalid, 50 Unknown, 0 Unchecked, 19.60ms Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 53.85ms Time] [2021-11-13 02:39:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-13 02:39:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2021-11-13 02:39:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 419 states have (on average 1.6563245823389021) internal successors, (694), 434 states have internal predecessors, (694), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-13 02:39:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 879 transitions. [2021-11-13 02:39:51,406 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 879 transitions. Word has length 101 [2021-11-13 02:39:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:51,408 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 879 transitions. [2021-11-13 02:39:51,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 02:39:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 879 transitions. [2021-11-13 02:39:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 02:39:51,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:51,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:39:51,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:51,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:51,650 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:51,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash -583314525, now seen corresponding path program 1 times [2021-11-13 02:39:51,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:51,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379291524] [2021-11-13 02:39:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:51,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:51,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:51,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:39:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:52,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:39:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:52,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:52,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:52,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379291524] [2021-11-13 02:39:52,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379291524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:52,892 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:52,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:39:52,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953718873] [2021-11-13 02:39:52,893 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:52,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:39:52,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:39:52,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:39:52,896 INFO L87 Difference]: Start difference. First operand 536 states and 879 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:39:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:53,129 INFO L93 Difference]: Finished difference Result 1060 states and 1750 transitions. [2021-11-13 02:39:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:39:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 106 [2021-11-13 02:39:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:53,137 INFO L225 Difference]: With dead ends: 1060 [2021-11-13 02:39:53,137 INFO L226 Difference]: Without dead ends: 545 [2021-11-13 02:39:53,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:39:53,143 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 214 mSDsluCounter, 4290 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5153 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.08ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:53,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 5153 Invalid, 88 Unknown, 0 Unchecked, 15.08ms Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 140.61ms Time] [2021-11-13 02:39:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-13 02:39:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-11-13 02:39:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 427 states have (on average 1.6557377049180328) internal successors, (707), 443 states have internal predecessors, (707), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-13 02:39:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 893 transitions. [2021-11-13 02:39:53,179 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 893 transitions. Word has length 106 [2021-11-13 02:39:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:53,179 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 893 transitions. [2021-11-13 02:39:53,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:39:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 893 transitions. [2021-11-13 02:39:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 02:39:53,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:53,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:53,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:53,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:53,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2053443708, now seen corresponding path program 1 times [2021-11-13 02:39:53,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:53,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065153871] [2021-11-13 02:39:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:53,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:53,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:53,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:53,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:39:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:53,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:39:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:54,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:54,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:54,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065153871] [2021-11-13 02:39:54,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065153871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:54,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:54,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:39:54,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285986940] [2021-11-13 02:39:54,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:54,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:39:54,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:54,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:39:54,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:39:54,506 INFO L87 Difference]: Start difference. First operand 545 states and 893 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:39:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:54,829 INFO L93 Difference]: Finished difference Result 1116 states and 1841 transitions. [2021-11-13 02:39:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:39:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 107 [2021-11-13 02:39:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:54,836 INFO L225 Difference]: With dead ends: 1116 [2021-11-13 02:39:54,836 INFO L226 Difference]: Without dead ends: 559 [2021-11-13 02:39:54,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:39:54,841 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 136 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4022 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.49ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.03ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:54,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 4022 Invalid, 203 Unknown, 0 Unchecked, 18.49ms Time], IncrementalHoareTripleChecker [35 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 229.03ms Time] [2021-11-13 02:39:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-13 02:39:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 550. [2021-11-13 02:39:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 432 states have (on average 1.5972222222222223) internal successors, (690), 447 states have internal predecessors, (690), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-13 02:39:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 875 transitions. [2021-11-13 02:39:54,873 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 875 transitions. Word has length 107 [2021-11-13 02:39:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:54,874 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 875 transitions. [2021-11-13 02:39:54,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:39:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 875 transitions. [2021-11-13 02:39:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 02:39:54,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:54,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:39:54,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 02:39:55,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:55,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1464940279, now seen corresponding path program 1 times [2021-11-13 02:39:55,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:55,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112702039] [2021-11-13 02:39:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:55,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:55,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:55,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:39:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:39:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:55,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:56,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:56,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112702039] [2021-11-13 02:39:56,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112702039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:56,257 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:56,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 02:39:56,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878664831] [2021-11-13 02:39:56,258 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:56,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:39:56,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:39:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:39:56,260 INFO L87 Difference]: Start difference. First operand 550 states and 875 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:39:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:56,440 INFO L93 Difference]: Finished difference Result 1058 states and 1704 transitions. [2021-11-13 02:39:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:39:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 109 [2021-11-13 02:39:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:56,447 INFO L225 Difference]: With dead ends: 1058 [2021-11-13 02:39:56,448 INFO L226 Difference]: Without dead ends: 538 [2021-11-13 02:39:56,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:39:56,461 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 137 mSDsluCounter, 3333 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 4177 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:56,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 4177 Invalid, 70 Unknown, 0 Unchecked, 10.47ms Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 113.06ms Time] [2021-11-13 02:39:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-13 02:39:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 529. [2021-11-13 02:39:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 411 states have (on average 1.610705596107056) internal successors, (662), 426 states have internal predecessors, (662), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-13 02:39:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 847 transitions. [2021-11-13 02:39:56,496 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 847 transitions. Word has length 109 [2021-11-13 02:39:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:56,497 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 847 transitions. [2021-11-13 02:39:56,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:39:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 847 transitions. [2021-11-13 02:39:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 02:39:56,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:56,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:39:56,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:56,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:56,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1161868368, now seen corresponding path program 1 times [2021-11-13 02:39:56,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:56,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568817781] [2021-11-13 02:39:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:56,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:56,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:56,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:39:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:57,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:39:57,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:57,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:39:57,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:57,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568817781] [2021-11-13 02:39:57,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568817781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:57,994 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:57,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:39:57,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038839708] [2021-11-13 02:39:57,995 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:57,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:39:57,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:39:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:39:57,997 INFO L87 Difference]: Start difference. First operand 529 states and 847 transitions. Second operand has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:39:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:58,388 INFO L93 Difference]: Finished difference Result 1027 states and 1659 transitions. [2021-11-13 02:39:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:39:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 112 [2021-11-13 02:39:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:58,396 INFO L225 Difference]: With dead ends: 1027 [2021-11-13 02:39:58,397 INFO L226 Difference]: Without dead ends: 534 [2021-11-13 02:39:58,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:39:58,402 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 45 mSDsluCounter, 8784 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 9588 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.56ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 257.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:58,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 9588 Invalid, 250 Unknown, 0 Unchecked, 33.56ms Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 257.87ms Time] [2021-11-13 02:39:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-13 02:39:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 531. [2021-11-13 02:39:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 413 states have (on average 1.6053268765133173) internal successors, (663), 428 states have internal predecessors, (663), 93 states have call successors, (93), 25 states have call predecessors, (93), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-13 02:39:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 848 transitions. [2021-11-13 02:39:58,437 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 848 transitions. Word has length 112 [2021-11-13 02:39:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:58,437 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 848 transitions. [2021-11-13 02:39:58,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 02:39:58,438 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 848 transitions. [2021-11-13 02:39:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 02:39:58,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:58,442 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:58,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:58,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:58,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:58,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1052870499, now seen corresponding path program 1 times [2021-11-13 02:39:58,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:58,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61669048] [2021-11-13 02:39:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:58,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:58,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:58,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:58,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:39:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:39:59,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:39:59,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:59,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61669048] [2021-11-13 02:39:59,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61669048] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:59,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:39:59,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:39:59,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42385857] [2021-11-13 02:39:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:59,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:39:59,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:39:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:39:59,862 INFO L87 Difference]: Start difference. First operand 531 states and 848 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:01,892 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 [] [2021-11-13 02:40:03,899 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 [] [2021-11-13 02:40:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:04,889 INFO L93 Difference]: Finished difference Result 1023 states and 1677 transitions. [2021-11-13 02:40:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:40:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2021-11-13 02:40:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:04,895 INFO L225 Difference]: With dead ends: 1023 [2021-11-13 02:40:04,895 INFO L226 Difference]: Without dead ends: 535 [2021-11-13 02:40:04,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:40:04,901 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 780 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4819.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.03ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4940.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:04,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 2047 Invalid, 436 Unknown, 0 Unchecked, 10.03ms Time], IncrementalHoareTripleChecker [16 Valid, 418 Invalid, 2 Unknown, 0 Unchecked, 4940.15ms Time] [2021-11-13 02:40:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-13 02:40:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-13 02:40:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 416 states have (on average 1.6009615384615385) internal successors, (666), 431 states have internal predecessors, (666), 93 states have call successors, (93), 26 states have call predecessors, (93), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-13 02:40:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 852 transitions. [2021-11-13 02:40:04,935 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 852 transitions. Word has length 113 [2021-11-13 02:40:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:04,936 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 852 transitions. [2021-11-13 02:40:04,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 852 transitions. [2021-11-13 02:40:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 02:40:04,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:04,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:04,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:05,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:05,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1995321546, now seen corresponding path program 1 times [2021-11-13 02:40:05,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:05,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864335267] [2021-11-13 02:40:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:05,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:05,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:05,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:05,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:40:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:05,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:40:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:40:05,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:40:06,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:06,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864335267] [2021-11-13 02:40:06,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864335267] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:06,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:06,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:40:06,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978713196] [2021-11-13 02:40:06,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:06,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:40:06,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:40:06,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:40:06,406 INFO L87 Difference]: Start difference. First operand 535 states and 852 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:08,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:10,451 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 [] [2021-11-13 02:40:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:11,525 INFO L93 Difference]: Finished difference Result 1032 states and 1684 transitions. [2021-11-13 02:40:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:40:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-13 02:40:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:11,532 INFO L225 Difference]: With dead ends: 1032 [2021-11-13 02:40:11,533 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 02:40:11,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:40:11,540 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 778 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4880.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.63ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5029.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:11,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 2048 Invalid, 438 Unknown, 0 Unchecked, 9.63ms Time], IncrementalHoareTripleChecker [14 Valid, 422 Invalid, 2 Unknown, 0 Unchecked, 5029.02ms Time] [2021-11-13 02:40:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 02:40:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-13 02:40:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 420 states have (on average 1.5952380952380953) internal successors, (670), 435 states have internal predecessors, (670), 93 states have call successors, (93), 27 states have call predecessors, (93), 26 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2021-11-13 02:40:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 857 transitions. [2021-11-13 02:40:11,577 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 857 transitions. Word has length 116 [2021-11-13 02:40:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:11,579 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 857 transitions. [2021-11-13 02:40:11,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 857 transitions. [2021-11-13 02:40:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 02:40:11,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:11,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:11,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:11,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:11,813 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash -44289537, now seen corresponding path program 1 times [2021-11-13 02:40:11,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:11,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97837539] [2021-11-13 02:40:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:11,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:11,815 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:11,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:40:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:12,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:40:12,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:40:12,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:40:13,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:13,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97837539] [2021-11-13 02:40:13,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97837539] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:13,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:13,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:40:13,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102078048] [2021-11-13 02:40:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:13,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:40:13,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:40:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:40:13,027 INFO L87 Difference]: Start difference. First operand 540 states and 857 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:15,056 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 [] [2021-11-13 02:40:17,064 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 [] [2021-11-13 02:40:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:18,061 INFO L93 Difference]: Finished difference Result 1043 states and 1693 transitions. [2021-11-13 02:40:18,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:40:18,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-11-13 02:40:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:18,066 INFO L225 Difference]: With dead ends: 1043 [2021-11-13 02:40:18,067 INFO L226 Difference]: Without dead ends: 546 [2021-11-13 02:40:18,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:40:18,074 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 778 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4821.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.46ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4949.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:18,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 2048 Invalid, 437 Unknown, 0 Unchecked, 10.46ms Time], IncrementalHoareTripleChecker [12 Valid, 423 Invalid, 2 Unknown, 0 Unchecked, 4949.68ms Time] [2021-11-13 02:40:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-13 02:40:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-13 02:40:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 425 states have (on average 1.588235294117647) internal successors, (675), 440 states have internal predecessors, (675), 93 states have call successors, (93), 28 states have call predecessors, (93), 27 states have return successors, (95), 90 states have call predecessors, (95), 92 states have call successors, (95) [2021-11-13 02:40:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 863 transitions. [2021-11-13 02:40:18,109 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 863 transitions. Word has length 119 [2021-11-13 02:40:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:18,109 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 863 transitions. [2021-11-13 02:40:18,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 863 transitions. [2021-11-13 02:40:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 02:40:18,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:18,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:18,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:18,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:18,331 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1944870282, now seen corresponding path program 1 times [2021-11-13 02:40:18,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:18,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49270990] [2021-11-13 02:40:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:18,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:18,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:18,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:18,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:40:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:18,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:40:18,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:40:19,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:40:19,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:19,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49270990] [2021-11-13 02:40:19,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49270990] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:19,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:19,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:40:19,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858252194] [2021-11-13 02:40:19,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:19,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:40:19,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:40:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:40:19,643 INFO L87 Difference]: Start difference. First operand 546 states and 863 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:21,662 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 [] [2021-11-13 02:40:23,668 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 [] [2021-11-13 02:40:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:24,636 INFO L93 Difference]: Finished difference Result 1056 states and 1704 transitions. [2021-11-13 02:40:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:40:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2021-11-13 02:40:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:24,641 INFO L225 Difference]: With dead ends: 1056 [2021-11-13 02:40:24,641 INFO L226 Difference]: Without dead ends: 553 [2021-11-13 02:40:24,646 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 [2021-11-13 02:40:24,647 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 775 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4774.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.76ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4925.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:24,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2048 Invalid, 436 Unknown, 0 Unchecked, 6.76ms Time], IncrementalHoareTripleChecker [10 Valid, 424 Invalid, 2 Unknown, 0 Unchecked, 4925.38ms Time] [2021-11-13 02:40:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-13 02:40:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-13 02:40:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 431 states have (on average 1.580046403712297) internal successors, (681), 446 states have internal predecessors, (681), 93 states have call successors, (93), 29 states have call predecessors, (93), 28 states have return successors, (96), 90 states have call predecessors, (96), 92 states have call successors, (96) [2021-11-13 02:40:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 870 transitions. [2021-11-13 02:40:24,676 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 870 transitions. Word has length 122 [2021-11-13 02:40:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:24,677 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 870 transitions. [2021-11-13 02:40:24,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:40:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 870 transitions. [2021-11-13 02:40:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 02:40:24,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:24,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:24,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:24,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:24,898 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:24,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1449268891, now seen corresponding path program 1 times [2021-11-13 02:40:24,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:24,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693738568] [2021-11-13 02:40:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:24,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:24,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:24,900 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:24,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:40:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:40:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 02:40:25,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 02:40:26,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:26,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693738568] [2021-11-13 02:40:26,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693738568] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:26,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:26,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-13 02:40:26,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153365437] [2021-11-13 02:40:26,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:26,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:40:26,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:40:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:40:26,481 INFO L87 Difference]: Start difference. First operand 553 states and 870 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 02:40:28,509 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 [] [2021-11-13 02:40:30,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:32,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:34,530 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 [] [2021-11-13 02:40:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:43,644 INFO L93 Difference]: Finished difference Result 1869 states and 3021 transitions. [2021-11-13 02:40:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 02:40:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2021-11-13 02:40:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:43,659 INFO L225 Difference]: With dead ends: 1869 [2021-11-13 02:40:43,659 INFO L226 Difference]: Without dead ends: 1359 [2021-11-13 02:40:43,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:40:43,664 INFO L933 BasicCegarLoop]: 1461 mSDtfsCounter, 1638 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 5923 mSolverCounterSat, 625 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15682.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1742 SdHoareTripleChecker+Valid, 4860 SdHoareTripleChecker+Invalid, 6552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.77ms SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 5923 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16804.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:43,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1742 Valid, 4860 Invalid, 6552 Unknown, 0 Unchecked, 61.77ms Time], IncrementalHoareTripleChecker [625 Valid, 5923 Invalid, 4 Unknown, 0 Unchecked, 16804.06ms Time] [2021-11-13 02:40:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-11-13 02:40:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1137. [2021-11-13 02:40:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 864 states have (on average 1.5844907407407407) internal successors, (1369), 901 states have internal predecessors, (1369), 212 states have call successors, (212), 55 states have call predecessors, (212), 60 states have return successors, (237), 211 states have call predecessors, (237), 210 states have call successors, (237) [2021-11-13 02:40:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1818 transitions. [2021-11-13 02:40:43,790 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1818 transitions. Word has length 125 [2021-11-13 02:40:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:43,791 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1818 transitions. [2021-11-13 02:40:43,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 02:40:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1818 transitions. [2021-11-13 02:40:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 02:40:43,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:43,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 02:40:43,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:44,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:44,013 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash 442512690, now seen corresponding path program 1 times [2021-11-13 02:40:44,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:44,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743010814] [2021-11-13 02:40:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:44,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:44,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:44,015 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:44,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:40:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:44,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:40:44,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:40:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:40:45,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:45,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743010814] [2021-11-13 02:40:45,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743010814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:45,219 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:45,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-13 02:40:45,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407804358] [2021-11-13 02:40:45,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:45,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:40:45,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:40:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:40:45,221 INFO L87 Difference]: Start difference. First operand 1137 states and 1818 transitions. Second operand has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:40:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:45,543 INFO L93 Difference]: Finished difference Result 2201 states and 3543 transitions. [2021-11-13 02:40:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:40:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 128 [2021-11-13 02:40:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:45,556 INFO L225 Difference]: With dead ends: 2201 [2021-11-13 02:40:45,556 INFO L226 Difference]: Without dead ends: 1097 [2021-11-13 02:40:45,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:40:45,564 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 80 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 5587 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.14ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.13ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:45,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 5587 Invalid, 147 Unknown, 0 Unchecked, 7.14ms Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 198.13ms Time] [2021-11-13 02:40:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-11-13 02:40:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1094. [2021-11-13 02:40:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 832 states have (on average 1.5913461538461537) internal successors, (1324), 868 states have internal predecessors, (1324), 206 states have call successors, (206), 52 states have call predecessors, (206), 55 states have return successors, (224), 204 states have call predecessors, (224), 204 states have call successors, (224) [2021-11-13 02:40:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1754 transitions. [2021-11-13 02:40:45,633 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1754 transitions. Word has length 128 [2021-11-13 02:40:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:45,633 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1754 transitions. [2021-11-13 02:40:45,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:40:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1754 transitions. [2021-11-13 02:40:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 02:40:45,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:45,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:45,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:45,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:45,857 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:45,857 INFO L85 PathProgramCache]: Analyzing trace with hash -467176545, now seen corresponding path program 1 times [2021-11-13 02:40:45,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:45,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552542128] [2021-11-13 02:40:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:45,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:45,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:45,859 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:45,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:40:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:46,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:40:46,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:40:46,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:40:47,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:47,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552542128] [2021-11-13 02:40:47,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552542128] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:47,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:40:47,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-13 02:40:47,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190091744] [2021-11-13 02:40:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:47,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:40:47,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:40:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:40:47,358 INFO L87 Difference]: Start difference. First operand 1094 states and 1754 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:40:49,380 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 [] [2021-11-13 02:40:51,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:53,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:55,402 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 [] [2021-11-13 02:40:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:59,333 INFO L93 Difference]: Finished difference Result 2738 states and 4441 transitions. [2021-11-13 02:40:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:40:59,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2021-11-13 02:40:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:59,349 INFO L225 Difference]: With dead ends: 2738 [2021-11-13 02:40:59,349 INFO L226 Difference]: Without dead ends: 1684 [2021-11-13 02:40:59,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:40:59,357 INFO L933 BasicCegarLoop]: 750 mSDtfsCounter, 1966 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 2603 mSolverCounterSat, 496 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11230.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.28ms SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2603 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11775.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:59,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2068 Valid, 1884 Invalid, 3103 Unknown, 0 Unchecked, 18.28ms Time], IncrementalHoareTripleChecker [496 Valid, 2603 Invalid, 4 Unknown, 0 Unchecked, 11775.62ms Time] [2021-11-13 02:40:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-11-13 02:40:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1643. [2021-11-13 02:40:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1239 states have (on average 1.5948345439870864) internal successors, (1976), 1296 states have internal predecessors, (1976), 319 states have call successors, (319), 75 states have call predecessors, (319), 84 states have return successors, (362), 320 states have call predecessors, (362), 316 states have call successors, (362) [2021-11-13 02:40:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2657 transitions. [2021-11-13 02:40:59,480 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2657 transitions. Word has length 131 [2021-11-13 02:40:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:59,480 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 2657 transitions. [2021-11-13 02:40:59,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:40:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2657 transitions. [2021-11-13 02:40:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 02:40:59,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:59,485 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:59,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:59,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:59,697 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2012855590, now seen corresponding path program 1 times [2021-11-13 02:40:59,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:59,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538264426] [2021-11-13 02:40:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:59,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:59,699 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:59,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:41:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:41:00,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:41:00,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:41:00,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:00,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538264426] [2021-11-13 02:41:00,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538264426] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:41:00,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:41:00,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-13 02:41:00,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210809756] [2021-11-13 02:41:00,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:00,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:41:00,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:00,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:41:00,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:41:00,737 INFO L87 Difference]: Start difference. First operand 1643 states and 2657 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:41:02,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:04,781 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 [] [2021-11-13 02:41:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:05,808 INFO L93 Difference]: Finished difference Result 4707 states and 7680 transitions. [2021-11-13 02:41:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:41:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2021-11-13 02:41:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:05,838 INFO L225 Difference]: With dead ends: 4707 [2021-11-13 02:41:05,839 INFO L226 Difference]: Without dead ends: 3104 [2021-11-13 02:41:05,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:41:05,851 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 674 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4774.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.48ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4918.26ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:05,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 2726 Invalid, 532 Unknown, 0 Unchecked, 6.48ms Time], IncrementalHoareTripleChecker [23 Valid, 507 Invalid, 2 Unknown, 0 Unchecked, 4918.26ms Time] [2021-11-13 02:41:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-11-13 02:41:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3089. [2021-11-13 02:41:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 2312 states have (on average 1.5735294117647058) internal successors, (3638), 2422 states have internal predecessors, (3638), 616 states have call successors, (616), 150 states have call predecessors, (616), 160 states have return successors, (695), 611 states have call predecessors, (695), 610 states have call successors, (695) [2021-11-13 02:41:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4949 transitions. [2021-11-13 02:41:06,086 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4949 transitions. Word has length 132 [2021-11-13 02:41:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:06,086 INFO L470 AbstractCegarLoop]: Abstraction has 3089 states and 4949 transitions. [2021-11-13 02:41:06,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:41:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4949 transitions. [2021-11-13 02:41:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:41:06,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:06,091 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:06,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:06,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:06,309 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2003536712, now seen corresponding path program 1 times [2021-11-13 02:41:06,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:06,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421698322] [2021-11-13 02:41:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:06,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:06,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:06,312 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:06,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:41:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:41:06,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:41:07,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 02:41:07,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:07,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421698322] [2021-11-13 02:41:07,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421698322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:07,421 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:07,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 8 [2021-11-13 02:41:07,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674382271] [2021-11-13 02:41:07,421 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:07,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:41:07,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:41:07,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:41:07,423 INFO L87 Difference]: Start difference. First operand 3089 states and 4949 transitions. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-13 02:41:09,453 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 [] [2021-11-13 02:41:11,460 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:13,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:15,771 INFO L93 Difference]: Finished difference Result 9126 states and 14838 transitions. [2021-11-13 02:41:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:41:15,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 134 [2021-11-13 02:41:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:15,825 INFO L225 Difference]: With dead ends: 9126 [2021-11-13 02:41:15,825 INFO L226 Difference]: Without dead ends: 6077 [2021-11-13 02:41:15,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:41:15,849 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 1550 mSDsluCounter, 3677 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7760.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 5277 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.04ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8036.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:15,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 5277 Invalid, 1234 Unknown, 0 Unchecked, 13.04ms Time], IncrementalHoareTripleChecker [15 Valid, 1216 Invalid, 3 Unknown, 0 Unchecked, 8036.53ms Time] [2021-11-13 02:41:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-11-13 02:41:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 6051. [2021-11-13 02:41:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6051 states, 4530 states have (on average 1.5690949227373068) internal successors, (7108), 4749 states have internal predecessors, (7108), 1203 states have call successors, (1203), 297 states have call predecessors, (1203), 317 states have return successors, (1502), 1194 states have call predecessors, (1502), 1191 states have call successors, (1502) [2021-11-13 02:41:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6051 states to 6051 states and 9813 transitions. [2021-11-13 02:41:16,460 INFO L78 Accepts]: Start accepts. Automaton has 6051 states and 9813 transitions. Word has length 134 [2021-11-13 02:41:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:16,460 INFO L470 AbstractCegarLoop]: Abstraction has 6051 states and 9813 transitions. [2021-11-13 02:41:16,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-13 02:41:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6051 states and 9813 transitions. [2021-11-13 02:41:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:41:16,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:16,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:16,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:16,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:16,697 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -509930649, now seen corresponding path program 1 times [2021-11-13 02:41:16,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:16,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483888963] [2021-11-13 02:41:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:16,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:16,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:16,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:16,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:41:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:17,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:41:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:41:17,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 02:41:17,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:17,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483888963] [2021-11-13 02:41:17,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483888963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:17,943 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:17,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-13 02:41:17,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735212201] [2021-11-13 02:41:17,944 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:17,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:41:17,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:17,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:41:17,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:41:17,945 INFO L87 Difference]: Start difference. First operand 6051 states and 9813 transitions. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-13 02:41:19,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:21,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:23,769 INFO L93 Difference]: Finished difference Result 13873 states and 22613 transitions. [2021-11-13 02:41:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:41:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 134 [2021-11-13 02:41:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:23,864 INFO L225 Difference]: With dead ends: 13873 [2021-11-13 02:41:23,864 INFO L226 Difference]: Without dead ends: 10046 [2021-11-13 02:41:23,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:41:23,890 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 1629 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 99 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5049.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1641 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.97ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5200.04ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:23,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1641 Valid, 3013 Invalid, 673 Unknown, 0 Unchecked, 9.97ms Time], IncrementalHoareTripleChecker [99 Valid, 572 Invalid, 2 Unknown, 0 Unchecked, 5200.04ms Time] [2021-11-13 02:41:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-11-13 02:41:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9786. [2021-11-13 02:41:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9786 states, 7372 states have (on average 1.5613130765056973) internal successors, (11510), 7715 states have internal predecessors, (11510), 1862 states have call successors, (1862), 489 states have call predecessors, (1862), 551 states have return successors, (2423), 1869 states have call predecessors, (2423), 1844 states have call successors, (2423) [2021-11-13 02:41:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9786 states to 9786 states and 15795 transitions. [2021-11-13 02:41:24,720 INFO L78 Accepts]: Start accepts. Automaton has 9786 states and 15795 transitions. Word has length 134 [2021-11-13 02:41:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:24,720 INFO L470 AbstractCegarLoop]: Abstraction has 9786 states and 15795 transitions. [2021-11-13 02:41:24,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-13 02:41:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 9786 states and 15795 transitions. [2021-11-13 02:41:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 02:41:24,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:24,724 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:24,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:24,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:24,942 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1126143401, now seen corresponding path program 1 times [2021-11-13 02:41:24,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:24,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075903708] [2021-11-13 02:41:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:24,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:24,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:24,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:41:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:25,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:41:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:41:25,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:41:26,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:26,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075903708] [2021-11-13 02:41:26,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075903708] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:41:26,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:41:26,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-13 02:41:26,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517256293] [2021-11-13 02:41:26,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:26,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:41:26,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:41:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:41:26,771 INFO L87 Difference]: Start difference. First operand 9786 states and 15795 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:41:28,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:30,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:32,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:34,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:36,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:38,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:45,025 INFO L93 Difference]: Finished difference Result 17264 states and 27866 transitions. [2021-11-13 02:41:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:41:45,026 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 136 [2021-11-13 02:41:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:45,086 INFO L225 Difference]: With dead ends: 17264 [2021-11-13 02:41:45,087 INFO L226 Difference]: Without dead ends: 9896 [2021-11-13 02:41:45,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:41:45,114 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1884 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 4057 mSolverCounterSat, 471 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16907.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1988 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 4534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.25ms SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 4057 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17590.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:45,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1988 Valid, 2565 Invalid, 4534 Unknown, 0 Unchecked, 26.25ms Time], IncrementalHoareTripleChecker [471 Valid, 4057 Invalid, 6 Unknown, 0 Unchecked, 17590.66ms Time] [2021-11-13 02:41:45,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9896 states. [2021-11-13 02:41:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9896 to 9742. [2021-11-13 02:41:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9742 states, 7348 states have (on average 1.5609689711486119) internal successors, (11470), 7691 states have internal predecessors, (11470), 1846 states have call successors, (1846), 485 states have call predecessors, (1846), 547 states have return successors, (2407), 1853 states have call predecessors, (2407), 1828 states have call successors, (2407) [2021-11-13 02:41:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9742 states to 9742 states and 15723 transitions. [2021-11-13 02:41:45,812 INFO L78 Accepts]: Start accepts. Automaton has 9742 states and 15723 transitions. Word has length 136 [2021-11-13 02:41:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:45,813 INFO L470 AbstractCegarLoop]: Abstraction has 9742 states and 15723 transitions. [2021-11-13 02:41:45,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:41:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 9742 states and 15723 transitions. [2021-11-13 02:41:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 02:41:45,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:45,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:45,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:46,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:46,040 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2013018717, now seen corresponding path program 1 times [2021-11-13 02:41:46,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:46,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774311963] [2021-11-13 02:41:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:46,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:46,042 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:46,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:41:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:46,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:41:46,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:41:47,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 02:41:47,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:47,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774311963] [2021-11-13 02:41:47,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774311963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:47,576 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:47,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-13 02:41:47,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36501050] [2021-11-13 02:41:47,577 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:47,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:41:47,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:41:47,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:41:47,578 INFO L87 Difference]: Start difference. First operand 9742 states and 15723 transitions. Second operand has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 02:41:49,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:51,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:53,612 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 [] [2021-11-13 02:41:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:57,132 INFO L93 Difference]: Finished difference Result 24538 states and 39786 transitions. [2021-11-13 02:41:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 02:41:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 139 [2021-11-13 02:41:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:57,317 INFO L225 Difference]: With dead ends: 24538 [2021-11-13 02:41:57,318 INFO L226 Difference]: Without dead ends: 17044 [2021-11-13 02:41:57,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:41:57,353 INFO L933 BasicCegarLoop]: 1138 mSDtfsCounter, 2001 mSDsluCounter, 3579 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 147 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8397.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 4717 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.62ms SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8745.43ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:57,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2011 Valid, 4717 Invalid, 1768 Unknown, 0 Unchecked, 15.62ms Time], IncrementalHoareTripleChecker [147 Valid, 1618 Invalid, 3 Unknown, 0 Unchecked, 8745.43ms Time] [2021-11-13 02:41:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17044 states. [2021-11-13 02:41:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17044 to 16922. [2021-11-13 02:41:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16922 states, 12804 states have (on average 1.5427991252733522) internal successors, (19754), 13391 states have internal predecessors, (19754), 3120 states have call successors, (3120), 885 states have call predecessors, (3120), 997 states have return successors, (4269), 3129 states have call predecessors, (4269), 3090 states have call successors, (4269) [2021-11-13 02:41:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16922 states to 16922 states and 27143 transitions. [2021-11-13 02:41:58,495 INFO L78 Accepts]: Start accepts. Automaton has 16922 states and 27143 transitions. Word has length 139 [2021-11-13 02:41:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:58,496 INFO L470 AbstractCegarLoop]: Abstraction has 16922 states and 27143 transitions. [2021-11-13 02:41:58,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 02:41:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 16922 states and 27143 transitions. [2021-11-13 02:41:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:41:58,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:58,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:58,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:58,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:58,720 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:58,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2077570252, now seen corresponding path program 1 times [2021-11-13 02:41:58,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:58,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669948024] [2021-11-13 02:41:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:58,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:58,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:58,723 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:58,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:41:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:59,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:41:59,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:41:59,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 02:41:59,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:59,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669948024] [2021-11-13 02:41:59,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669948024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:59,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:41:59,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:41:59,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169854570] [2021-11-13 02:41:59,970 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:59,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:41:59,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:41:59,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:41:59,972 INFO L87 Difference]: Start difference. First operand 16922 states and 27143 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-13 02:42:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:01,064 INFO L93 Difference]: Finished difference Result 33034 states and 53384 transitions. [2021-11-13 02:42:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:42:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 146 [2021-11-13 02:42:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:01,189 INFO L225 Difference]: With dead ends: 33034 [2021-11-13 02:42:01,189 INFO L226 Difference]: Without dead ends: 16950 [2021-11-13 02:42:01,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:42:01,269 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 639 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.06ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:01,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 2980 Invalid, 123 Unknown, 0 Unchecked, 4.06ms Time], IncrementalHoareTripleChecker [58 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 110.92ms Time] [2021-11-13 02:42:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16950 states. [2021-11-13 02:42:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16950 to 16930. [2021-11-13 02:42:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16930 states, 12808 states have (on average 1.5220174890693317) internal successors, (19494), 13399 states have internal predecessors, (19494), 3120 states have call successors, (3120), 885 states have call predecessors, (3120), 1001 states have return successors, (4275), 3129 states have call predecessors, (4275), 3090 states have call successors, (4275) [2021-11-13 02:42:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16930 states to 16930 states and 26889 transitions. [2021-11-13 02:42:02,422 INFO L78 Accepts]: Start accepts. Automaton has 16930 states and 26889 transitions. Word has length 146 [2021-11-13 02:42:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:02,422 INFO L470 AbstractCegarLoop]: Abstraction has 16930 states and 26889 transitions. [2021-11-13 02:42:02,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-13 02:42:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 16930 states and 26889 transitions. [2021-11-13 02:42:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 02:42:02,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:02,427 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:02,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:02,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:02,645 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1747941916, now seen corresponding path program 1 times [2021-11-13 02:42:02,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:02,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475449546] [2021-11-13 02:42:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:02,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:02,648 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:02,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:42:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:42:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:42:03,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 02:42:03,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:03,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475449546] [2021-11-13 02:42:03,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475449546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:03,782 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:03,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-13 02:42:03,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138330673] [2021-11-13 02:42:03,782 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:03,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:42:03,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:03,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:42:03,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:42:03,784 INFO L87 Difference]: Start difference. First operand 16930 states and 26889 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 02:42:05,813 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 [] [2021-11-13 02:42:07,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:07,310 INFO L93 Difference]: Finished difference Result 31356 states and 50338 transitions. [2021-11-13 02:42:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:42:07,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 151 [2021-11-13 02:42:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:07,420 INFO L225 Difference]: With dead ends: 31356 [2021-11-13 02:42:07,421 INFO L226 Difference]: Without dead ends: 17202 [2021-11-13 02:42:07,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:42:07,494 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 1357 mSDsluCounter, 2215 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2523.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3262 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.85ms SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2618.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:07,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 3262 Invalid, 464 Unknown, 0 Unchecked, 6.85ms Time], IncrementalHoareTripleChecker [215 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2618.54ms Time] [2021-11-13 02:42:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17202 states. [2021-11-13 02:42:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17202 to 17080. [2021-11-13 02:42:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17080 states, 12892 states have (on average 1.5186161960905988) internal successors, (19578), 13525 states have internal predecessors, (19578), 3168 states have call successors, (3168), 909 states have call predecessors, (3168), 1019 states have return successors, (4443), 3129 states have call predecessors, (4443), 3138 states have call successors, (4443) [2021-11-13 02:42:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17080 states to 17080 states and 27189 transitions. [2021-11-13 02:42:08,711 INFO L78 Accepts]: Start accepts. Automaton has 17080 states and 27189 transitions. Word has length 151 [2021-11-13 02:42:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:08,712 INFO L470 AbstractCegarLoop]: Abstraction has 17080 states and 27189 transitions. [2021-11-13 02:42:08,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 02:42:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 17080 states and 27189 transitions. [2021-11-13 02:42:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 02:42:08,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:08,717 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:08,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-13 02:42:08,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:08,933 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:08,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:08,933 INFO L85 PathProgramCache]: Analyzing trace with hash -374853964, now seen corresponding path program 1 times [2021-11-13 02:42:08,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:08,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855008093] [2021-11-13 02:42:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:08,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:08,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:08,935 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:08,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:42:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:09,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:42:09,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:42:09,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 02:42:10,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:10,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855008093] [2021-11-13 02:42:10,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855008093] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:42:10,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:42:10,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 02:42:10,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844612069] [2021-11-13 02:42:10,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:10,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:42:10,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:42:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:42:10,591 INFO L87 Difference]: Start difference. First operand 17080 states and 27189 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 02:42:12,622 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 [] [2021-11-13 02:42:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:17,310 INFO L93 Difference]: Finished difference Result 34635 states and 55656 transitions. [2021-11-13 02:42:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:42:17,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2021-11-13 02:42:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:17,418 INFO L225 Difference]: With dead ends: 34635 [2021-11-13 02:42:17,419 INFO L226 Difference]: Without dead ends: 20323 [2021-11-13 02:42:17,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:42:17,489 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 1994 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 302 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5005.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2081 SdHoareTripleChecker+Valid, 2536 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.95ms SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5485.44ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:17,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2081 Valid, 2536 Invalid, 2934 Unknown, 0 Unchecked, 20.95ms Time], IncrementalHoareTripleChecker [302 Valid, 2631 Invalid, 1 Unknown, 0 Unchecked, 5485.44ms Time] [2021-11-13 02:42:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20323 states. [2021-11-13 02:42:19,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20323 to 18835. [2021-11-13 02:42:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18835 states, 14286 states have (on average 1.508679826403472) internal successors, (21553), 14941 states have internal predecessors, (21553), 3376 states have call successors, (3376), 1027 states have call predecessors, (3376), 1172 states have return successors, (4781), 3326 states have call predecessors, (4781), 3349 states have call successors, (4781) [2021-11-13 02:42:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18835 states to 18835 states and 29710 transitions. [2021-11-13 02:42:19,303 INFO L78 Accepts]: Start accepts. Automaton has 18835 states and 29710 transitions. Word has length 156 [2021-11-13 02:42:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:19,304 INFO L470 AbstractCegarLoop]: Abstraction has 18835 states and 29710 transitions. [2021-11-13 02:42:19,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 02:42:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 18835 states and 29710 transitions. [2021-11-13 02:42:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 02:42:19,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:19,308 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:19,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:19,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:19,527 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash 304113656, now seen corresponding path program 1 times [2021-11-13 02:42:19,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:19,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135789565] [2021-11-13 02:42:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:19,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:19,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:19,529 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:19,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:42:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:19,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:42:19,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-13 02:42:20,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-13 02:42:20,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:20,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135789565] [2021-11-13 02:42:20,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135789565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:20,984 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:42:20,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-13 02:42:20,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643870670] [2021-11-13 02:42:20,985 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:20,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:42:20,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:42:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:42:20,986 INFO L87 Difference]: Start difference. First operand 18835 states and 29710 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-13 02:42:23,005 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 [] [2021-11-13 02:42:25,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:27,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:29,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:31,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:33,037 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 [] [2021-11-13 02:42:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:40,593 INFO L93 Difference]: Finished difference Result 37520 states and 59716 transitions. [2021-11-13 02:42:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 02:42:40,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) Word has length 156 [2021-11-13 02:42:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:40,677 INFO L225 Difference]: With dead ends: 37520 [2021-11-13 02:42:40,678 INFO L226 Difference]: Without dead ends: 9747 [2021-11-13 02:42:40,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:42:40,824 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1889 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 5356 mSolverCounterSat, 521 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17551.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 3469 SdHoareTripleChecker+Invalid, 5883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.78ms SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 5356 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18290.41ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:40,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 3469 Invalid, 5883 Unknown, 0 Unchecked, 33.78ms Time], IncrementalHoareTripleChecker [521 Valid, 5356 Invalid, 6 Unknown, 0 Unchecked, 18290.41ms Time] [2021-11-13 02:42:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9747 states. [2021-11-13 02:42:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9747 to 9654. [2021-11-13 02:42:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9654 states, 7509 states have (on average 1.5181781861765882) internal successors, (11400), 7807 states have internal predecessors, (11400), 1527 states have call successors, (1527), 572 states have call predecessors, (1527), 617 states have return successors, (2067), 1476 states have call predecessors, (2067), 1518 states have call successors, (2067) [2021-11-13 02:42:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9654 states to 9654 states and 14994 transitions. [2021-11-13 02:42:41,549 INFO L78 Accepts]: Start accepts. Automaton has 9654 states and 14994 transitions. Word has length 156 [2021-11-13 02:42:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:41,549 INFO L470 AbstractCegarLoop]: Abstraction has 9654 states and 14994 transitions. [2021-11-13 02:42:41,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-13 02:42:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 9654 states and 14994 transitions. [2021-11-13 02:42:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-13 02:42:41,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:41,595 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:41,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:41,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:41,809 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash 596756140, now seen corresponding path program 1 times [2021-11-13 02:42:41,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:41,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136303789] [2021-11-13 02:42:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:41,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:41,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:41,812 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:41,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:42:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:42,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:42:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2021-11-13 02:42:43,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2021-11-13 02:42:44,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:44,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136303789] [2021-11-13 02:42:44,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136303789] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:42:44,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:42:44,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-13 02:42:44,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117004215] [2021-11-13 02:42:44,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:44,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:42:44,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:42:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:42:44,714 INFO L87 Difference]: Start difference. First operand 9654 states and 14994 transitions. Second operand has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 5 states have internal predecessors, (188), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-13 02:42:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:45,242 INFO L93 Difference]: Finished difference Result 19146 states and 30221 transitions. [2021-11-13 02:42:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:42:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 5 states have internal predecessors, (188), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 488 [2021-11-13 02:42:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:45,295 INFO L225 Difference]: With dead ends: 19146 [2021-11-13 02:42:45,295 INFO L226 Difference]: Without dead ends: 10312 [2021-11-13 02:42:45,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:42:45,328 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 70 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 4085 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:45,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 4085 Invalid, 40 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [20 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 40.49ms Time] [2021-11-13 02:42:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10312 states. [2021-11-13 02:42:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10312 to 9734. [2021-11-13 02:42:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 7573 states have (on average 1.5137990228443152) internal successors, (11464), 7871 states have internal predecessors, (11464), 1527 states have call successors, (1527), 572 states have call predecessors, (1527), 633 states have return successors, (2093), 1492 states have call predecessors, (2093), 1518 states have call successors, (2093) [2021-11-13 02:42:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 15084 transitions. [2021-11-13 02:42:46,047 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 15084 transitions. Word has length 488 [2021-11-13 02:42:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:46,048 INFO L470 AbstractCegarLoop]: Abstraction has 9734 states and 15084 transitions. [2021-11-13 02:42:46,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 5 states have internal predecessors, (188), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-13 02:42:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 15084 transitions. [2021-11-13 02:42:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-13 02:42:46,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:46,101 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:46,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:46,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:46,325 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:46,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1607483973, now seen corresponding path program 1 times [2021-11-13 02:42:46,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:46,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365717027] [2021-11-13 02:42:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:46,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:46,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:46,327 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:46,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 02:42:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:47,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:42:47,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 581 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-13 02:42:48,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 35 proven. 70 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2021-11-13 02:42:49,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:49,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365717027] [2021-11-13 02:42:49,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365717027] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:42:49,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:42:49,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-13 02:42:49,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787982230] [2021-11-13 02:42:49,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:49,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:42:49,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:42:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:42:49,441 INFO L87 Difference]: Start difference. First operand 9734 states and 15084 transitions. Second operand has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2021-11-13 02:42:51,473 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 [] [2021-11-13 02:42:53,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:42:55,487 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:43:01,151 INFO L93 Difference]: Finished difference Result 28032 states and 44284 transitions. [2021-11-13 02:43:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:43:01,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) Word has length 507 [2021-11-13 02:43:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:43:01,221 INFO L225 Difference]: With dead ends: 28032 [2021-11-13 02:43:01,221 INFO L226 Difference]: Without dead ends: 18154 [2021-11-13 02:43:01,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:43:01,260 INFO L933 BasicCegarLoop]: 1284 mSDtfsCounter, 3008 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 3434 mSolverCounterSat, 816 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10046.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3172 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 4253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.32ms SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 3434 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10755.94ms IncrementalHoareTripleChecker+Time [2021-11-13 02:43:01,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3172 Valid, 2187 Invalid, 4253 Unknown, 0 Unchecked, 22.32ms Time], IncrementalHoareTripleChecker [816 Valid, 3434 Invalid, 3 Unknown, 0 Unchecked, 10755.94ms Time] [2021-11-13 02:43:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18154 states. [2021-11-13 02:43:02,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18154 to 17331. [2021-11-13 02:43:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17331 states, 13272 states have (on average 1.5067811934900543) internal successors, (19998), 13849 states have internal predecessors, (19998), 2859 states have call successors, (2859), 1092 states have call predecessors, (2859), 1199 states have return successors, (4152), 2769 states have call predecessors, (4152), 2846 states have call successors, (4152) [2021-11-13 02:43:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17331 states to 17331 states and 27009 transitions. [2021-11-13 02:43:02,365 INFO L78 Accepts]: Start accepts. Automaton has 17331 states and 27009 transitions. Word has length 507 [2021-11-13 02:43:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:43:02,365 INFO L470 AbstractCegarLoop]: Abstraction has 17331 states and 27009 transitions. [2021-11-13 02:43:02,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 6 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2021-11-13 02:43:02,366 INFO L276 IsEmpty]: Start isEmpty. Operand 17331 states and 27009 transitions. [2021-11-13 02:43:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-13 02:43:02,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:43:02,392 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:43:02,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:43:02,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:43:02,593 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:43:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:43:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash -877786773, now seen corresponding path program 1 times [2021-11-13 02:43:02,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:43:02,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491578605] [2021-11-13 02:43:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:02,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:43:02,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:43:02,595 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:43:02,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:43:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:43:03,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 717 proven. 27 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2021-11-13 02:43:04,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-13 02:43:06,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:06,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491578605] [2021-11-13 02:43:06,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491578605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:43:06,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [411449195] [2021-11-13 02:43:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:06,034 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:43:06,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:43:06,036 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:43:06,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-13 02:43:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:06,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:43:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-13 02:43:07,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2021-11-13 02:43:08,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [411449195] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:43:08,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:43:08,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11, 8] total 25 [2021-11-13 02:43:08,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138922663] [2021-11-13 02:43:08,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:43:08,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:43:08,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:43:08,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:43:08,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-13 02:43:08,675 INFO L87 Difference]: Start difference. First operand 17331 states and 27009 transitions. Second operand has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-13 02:43:10,706 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 [] [2021-11-13 02:43:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:43:13,890 INFO L93 Difference]: Finished difference Result 48799 states and 78114 transitions. [2021-11-13 02:43:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:43:13,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 484 [2021-11-13 02:43:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:43:14,055 INFO L225 Difference]: With dead ends: 48799 [2021-11-13 02:43:14,055 INFO L226 Difference]: Without dead ends: 31048 [2021-11-13 02:43:14,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1944 GetRequests, 1912 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 02:43:14,155 INFO L933 BasicCegarLoop]: 1346 mSDtfsCounter, 774 mSDsluCounter, 8479 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 117 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3190.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 9825 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.38ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3390.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:43:14,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 9825 Invalid, 1306 Unknown, 0 Unchecked, 16.38ms Time], IncrementalHoareTripleChecker [117 Valid, 1188 Invalid, 1 Unknown, 0 Unchecked, 3390.50ms Time] [2021-11-13 02:43:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31048 states. [2021-11-13 02:43:15,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31048 to 30530. [2021-11-13 02:43:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30530 states, 23205 states have (on average 1.5111829347123464) internal successors, (35067), 24282 states have internal predecessors, (35067), 5262 states have call successors, (5262), 1930 states have call predecessors, (5262), 2062 states have return successors, (7715), 5077 states have call predecessors, (7715), 5239 states have call successors, (7715) [2021-11-13 02:43:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30530 states to 30530 states and 48044 transitions. [2021-11-13 02:43:16,216 INFO L78 Accepts]: Start accepts. Automaton has 30530 states and 48044 transitions. Word has length 484 [2021-11-13 02:43:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:43:16,217 INFO L470 AbstractCegarLoop]: Abstraction has 30530 states and 48044 transitions. [2021-11-13 02:43:16,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 27.875) internal successors, (223), 9 states have internal predecessors, (223), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-13 02:43:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 30530 states and 48044 transitions. [2021-11-13 02:43:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-13 02:43:16,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:43:16,267 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:43:16,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:43:16,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:43:16,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:43:16,672 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:43:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:43:16,672 INFO L85 PathProgramCache]: Analyzing trace with hash 113414583, now seen corresponding path program 1 times [2021-11-13 02:43:16,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:43:16,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747168628] [2021-11-13 02:43:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:16,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:43:16,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:43:16,675 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:43:16,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 02:43:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:17,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:43:17,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 754 proven. 12 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2021-11-13 02:43:18,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 71 proven. 107 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-13 02:43:19,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:19,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747168628] [2021-11-13 02:43:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747168628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:43:19,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551254344] [2021-11-13 02:43:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:19,957 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:43:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:43:19,957 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:43:19,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-13 02:43:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:20,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:43:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 674 proven. 12 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-13 02:43:21,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-11-13 02:43:23,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551254344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:43:23,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662235194] [2021-11-13 02:43:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:43:23,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:43:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:43:23,356 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:43:23,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-13 02:43:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:43:23,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:43:23,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:43:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 674 proven. 12 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-13 02:43:24,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:43:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-11-13 02:43:25,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662235194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:43:25,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:43:25,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 9, 9, 9] total 27 [2021-11-13 02:43:25,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218361313] [2021-11-13 02:43:25,980 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:43:25,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 02:43:25,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:43:25,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 02:43:25,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-13 02:43:25,984 INFO L87 Difference]: Start difference. First operand 30530 states and 48044 transitions. Second operand has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) [2021-11-13 02:43:28,026 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 [] [2021-11-13 02:43:30,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:32,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:34,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:36,053 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:38,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:43:40,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:44:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:18,661 INFO L93 Difference]: Finished difference Result 87654 states and 143510 transitions. [2021-11-13 02:44:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-13 02:44:18,663 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) Word has length 486 [2021-11-13 02:44:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:19,099 INFO L225 Difference]: With dead ends: 87654 [2021-11-13 02:44:19,099 INFO L226 Difference]: Without dead ends: 56938 [2021-11-13 02:44:19,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3005 GetRequests, 2920 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2021-11-13 02:44:19,414 INFO L933 BasicCegarLoop]: 2095 mSDtfsCounter, 13416 mSDsluCounter, 7914 mSDsCounter, 0 mSdLazyCounter, 26268 mSolverCounterSat, 5906 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42848.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13416 SdHoareTripleChecker+Valid, 10009 SdHoareTripleChecker+Invalid, 32181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 131.21ms SdHoareTripleChecker+Time, 5906 IncrementalHoareTripleChecker+Valid, 26268 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46324.21ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:19,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13416 Valid, 10009 Invalid, 32181 Unknown, 0 Unchecked, 131.21ms Time], IncrementalHoareTripleChecker [5906 Valid, 26268 Invalid, 7 Unknown, 0 Unchecked, 46324.21ms Time] [2021-11-13 02:44:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56938 states. [2021-11-13 02:44:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56938 to 44797. [2021-11-13 02:44:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44797 states, 33734 states have (on average 1.4671844429951977) internal successors, (49494), 35247 states have internal predecessors, (49494), 7682 states have call successors, (7682), 3197 states have call predecessors, (7682), 3380 states have return successors, (11912), 7309 states have call predecessors, (11912), 7658 states have call successors, (11912) [2021-11-13 02:44:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44797 states to 44797 states and 69088 transitions. [2021-11-13 02:44:22,401 INFO L78 Accepts]: Start accepts. Automaton has 44797 states and 69088 transitions. Word has length 486 [2021-11-13 02:44:22,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:22,402 INFO L470 AbstractCegarLoop]: Abstraction has 44797 states and 69088 transitions. [2021-11-13 02:44:22,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) [2021-11-13 02:44:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 44797 states and 69088 transitions. [2021-11-13 02:44:22,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-13 02:44:22,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:22,430 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:22,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:22,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-13 02:44:22,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:23,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:44:23,031 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash 335821445, now seen corresponding path program 1 times [2021-11-13 02:44:23,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:23,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043611157] [2021-11-13 02:44:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:23,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:23,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:23,033 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:23,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 02:44:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:44:23,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 723 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-13 02:44:24,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2021-11-13 02:44:25,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:25,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043611157] [2021-11-13 02:44:25,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043611157] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:44:25,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:44:25,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:44:25,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062147286] [2021-11-13 02:44:25,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:25,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:44:25,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:25,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:44:25,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:44:25,609 INFO L87 Difference]: Start difference. First operand 44797 states and 69088 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 02:44:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:28,583 INFO L93 Difference]: Finished difference Result 87851 states and 137089 transitions. [2021-11-13 02:44:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:44:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 502 [2021-11-13 02:44:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:28,793 INFO L225 Difference]: With dead ends: 87851 [2021-11-13 02:44:28,793 INFO L226 Difference]: Without dead ends: 45851 [2021-11-13 02:44:28,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 999 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:44:28,979 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 101 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:28,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2208 Invalid, 160 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 140.01ms Time] [2021-11-13 02:44:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45851 states. [2021-11-13 02:44:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45851 to 45851. [2021-11-13 02:44:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45851 states, 34710 states have (on average 1.4636127917026793) internal successors, (50802), 36223 states have internal predecessors, (50802), 7682 states have call successors, (7682), 3275 states have call predecessors, (7682), 3458 states have return successors, (11912), 7309 states have call predecessors, (11912), 7658 states have call successors, (11912) [2021-11-13 02:44:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45851 states to 45851 states and 70396 transitions. [2021-11-13 02:44:32,022 INFO L78 Accepts]: Start accepts. Automaton has 45851 states and 70396 transitions. Word has length 502 [2021-11-13 02:44:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:32,023 INFO L470 AbstractCegarLoop]: Abstraction has 45851 states and 70396 transitions. [2021-11-13 02:44:32,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 02:44:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 45851 states and 70396 transitions. [2021-11-13 02:44:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-13 02:44:32,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:32,042 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:32,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:32,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:32,244 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:32,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1918055319, now seen corresponding path program 1 times [2021-11-13 02:44:32,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:32,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678506857] [2021-11-13 02:44:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:32,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:32,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:32,247 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:32,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 02:44:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:44:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-11-13 02:44:33,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 54 proven. 25 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2021-11-13 02:44:34,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:34,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678506857] [2021-11-13 02:44:34,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678506857] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:44:34,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:44:34,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:44:34,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019553542] [2021-11-13 02:44:34,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:34,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:44:34,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:44:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:44:34,748 INFO L87 Difference]: Start difference. First operand 45851 states and 70396 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 02:44:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:38,175 INFO L93 Difference]: Finished difference Result 90291 states and 140295 transitions. [2021-11-13 02:44:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:44:38,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 507 [2021-11-13 02:44:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:38,382 INFO L225 Difference]: With dead ends: 90291 [2021-11-13 02:44:38,382 INFO L226 Difference]: Without dead ends: 47333 [2021-11-13 02:44:38,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:44:38,528 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 99 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:38,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 2221 Invalid, 164 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 165.78ms Time] [2021-11-13 02:44:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47333 states. [2021-11-13 02:44:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47333 to 47333. [2021-11-13 02:44:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47333 states, 36110 states have (on average 1.4559401827748546) internal successors, (52574), 37623 states have internal predecessors, (52574), 7682 states have call successors, (7682), 3357 states have call predecessors, (7682), 3540 states have return successors, (11912), 7309 states have call predecessors, (11912), 7658 states have call successors, (11912) [2021-11-13 02:44:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47333 states to 47333 states and 72168 transitions. [2021-11-13 02:44:41,489 INFO L78 Accepts]: Start accepts. Automaton has 47333 states and 72168 transitions. Word has length 507 [2021-11-13 02:44:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:41,490 INFO L470 AbstractCegarLoop]: Abstraction has 47333 states and 72168 transitions. [2021-11-13 02:44:41,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 02:44:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 47333 states and 72168 transitions. [2021-11-13 02:44:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-13 02:44:41,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:41,512 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:41,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:41,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:41,713 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash 499138211, now seen corresponding path program 1 times [2021-11-13 02:44:41,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:41,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428150886] [2021-11-13 02:44:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:41,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:41,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:41,716 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:41,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9ae1800-08dd-4d01-b224-cb4495e4740e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 02:44:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:44:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 746 proven. 0 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2021-11-13 02:44:43,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 1271 trivial. 0 not checked. [2021-11-13 02:44:44,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:44,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428150886] [2021-11-13 02:44:44,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428150886] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:44:44,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:44:44,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:44:44,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507812457] [2021-11-13 02:44:44,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:44,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:44:44,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:44,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:44:44,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:44:44,162 INFO L87 Difference]: Start difference. First operand 47333 states and 72168 transitions. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41)