./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs --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 f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:33:31,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:33:31,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:33:31,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:33:31,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:33:31,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:33:31,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:33:31,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:33:31,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:33:31,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:33:31,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:33:31,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:33:31,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:33:31,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:33:31,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:33:31,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:33:31,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:33:31,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:33:31,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:33:31,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:33:31,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:33:31,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:33:31,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:33:31,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:33:31,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:33:31,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:33:31,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:33:31,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:33:31,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:33:31,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:33:31,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:33:31,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:33:31,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:33:31,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:33:31,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:33:31,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:33:31,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:33:31,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:33:31,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:33:31,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:33:31,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:33:31,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:33:31,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:33:31,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:33:31,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:33:31,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:33:31,662 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:33:31,662 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:33:31,663 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:33:31,663 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:33:31,663 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:33:31,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:33:31,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:33:31,668 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:33:31,669 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:33:31,669 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:33:31,669 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:33:31,669 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:33:31,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:33:31,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:33:31,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:33:31,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:33:31,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:33:31,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:33:31,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:33:31,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:33:31,672 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:33:31,672 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:33:31,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:33:31,673 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:33:31,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:33:31,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:33:31,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:33:31,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:33:31,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:33:31,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:33:31,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:33:31,676 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:33:31,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:33:31,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:33:31,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:33:31,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:33:31,678 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_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2021-11-19 13:33:32,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:33:32,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:33:32,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:33:32,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:33:32,108 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:33:32,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-19 13:33:32,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data/cac93e495/6378097ce52048d285c225241e86aa5f/FLAG941354f9b [2021-11-19 13:33:33,017 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:33:33,023 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-19 13:33:33,067 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data/cac93e495/6378097ce52048d285c225241e86aa5f/FLAG941354f9b [2021-11-19 13:33:33,128 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data/cac93e495/6378097ce52048d285c225241e86aa5f [2021-11-19 13:33:33,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:33:33,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:33:33,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:33,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:33:33,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:33:33,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:33" (1/1) ... [2021-11-19 13:33:33,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18787d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:33, skipping insertion in model container [2021-11-19 13:33:33,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:33" (1/1) ... [2021-11-19 13:33:33,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:33:33,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:33:33,934 WARN L230 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_0a89a478-27d8-4bda-b3d0-1b67a7765814/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-19 13:33:33,937 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:33,948 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) [2021-11-19 13:33:33,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57646f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:33, skipping insertion in model container [2021-11-19 13:33:33,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:33,950 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:33:33,952 INFO L158 Benchmark]: Toolchain (without parser) took 814.73ms. Allocated memory is still 98.6MB. Free memory was 57.6MB in the beginning and 60.5MB in the end (delta: -2.9MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2021-11-19 13:33:33,952 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 98.6MB. Free memory is still 76.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:33:33,953 INFO L158 Benchmark]: CACSL2BoogieTranslator took 809.16ms. Allocated memory is still 98.6MB. Free memory was 57.4MB in the beginning and 60.5MB in the end (delta: -3.1MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2021-11-19 13:33:33,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 98.6MB. Free memory is still 76.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 809.16ms. Allocated memory is still 98.6MB. Free memory was 57.4MB in the beginning and 60.5MB in the end (delta: -3.1MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs --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 f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:33:36,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:33:36,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:33:36,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:33:36,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:33:36,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:33:36,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:33:36,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:33:36,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:33:36,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:33:36,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:33:36,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:33:36,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:33:36,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:33:36,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:33:36,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:33:36,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:33:36,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:33:36,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:33:36,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:33:36,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:33:36,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:33:36,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:33:36,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:33:36,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:33:36,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:33:36,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:33:36,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:33:36,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:33:36,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:33:36,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:33:36,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:33:36,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:33:36,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:33:36,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:33:36,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:33:36,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:33:36,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:33:36,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:33:36,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:33:36,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:33:36,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:33:36,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:33:36,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:33:36,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:33:36,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:33:36,712 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:33:36,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:33:36,712 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:33:36,713 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:33:36,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:33:36,714 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:33:36,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:33:36,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:33:36,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:33:36,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:33:36,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:33:36,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:33:36,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:33:36,723 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:33:36,723 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:33:36,723 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:33:36,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:33:36,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:33:36,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:33:36,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:33:36,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:33:36,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:33:36,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:33:36,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:33:36,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:33:36,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:33:36,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:33:36,727 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:33:36,727 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:36,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:33:36,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:33:36,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:33:36,728 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_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2021-11-19 13:33:37,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:33:37,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:33:37,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:33:37,197 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:33:37,198 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:33:37,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-19 13:33:37,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data/07e65e3df/5d6c9a3af999418ca903f20c9bd82733/FLAGd7b2ffc6e [2021-11-19 13:33:38,060 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:33:38,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-19 13:33:38,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data/07e65e3df/5d6c9a3af999418ca903f20c9bd82733/FLAGd7b2ffc6e [2021-11-19 13:33:38,199 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/data/07e65e3df/5d6c9a3af999418ca903f20c9bd82733 [2021-11-19 13:33:38,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:33:38,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:33:38,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:38,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:33:38,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:33:38,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:38" (1/1) ... [2021-11-19 13:33:38,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42ac4890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:38, skipping insertion in model container [2021-11-19 13:33:38,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:38" (1/1) ... [2021-11-19 13:33:38,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:33:38,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:33:39,161 WARN L230 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_0a89a478-27d8-4bda-b3d0-1b67a7765814/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-19 13:33:39,172 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:39,199 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:33:39,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:33:39,390 WARN L230 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_0a89a478-27d8-4bda-b3d0-1b67a7765814/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-19 13:33:39,391 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:39,397 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:33:39,517 WARN L230 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_0a89a478-27d8-4bda-b3d0-1b67a7765814/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-19 13:33:39,518 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:39,555 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:33:39,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39 WrapperNode [2021-11-19 13:33:39,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:39,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:33:39,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:33:39,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:33:39,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,697 INFO L137 Inliner]: procedures = 95, calls = 339, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1001 [2021-11-19 13:33:39,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:33:39,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:33:39,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:33:39,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:33:39,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:33:39,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:33:39,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:33:39,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:33:39,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (1/1) ... [2021-11-19 13:33:39,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:33:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:39,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:33:39,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:33:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:33:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:33:39,905 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:33:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:33:39,906 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:33:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-19 13:33:39,906 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-19 13:33:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:33:39,907 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:33:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:33:39,907 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:33:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:33:39,907 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:33:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 13:33:39,908 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 13:33:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:33:39,908 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:33:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:33:39,909 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:33:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:33:39,909 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:33:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:33:39,910 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:33:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:33:39,910 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:33:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:33:39,910 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:33:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:33:39,911 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:33:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:33:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:33:39,912 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:33:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:33:39,912 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:33:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:33:39,912 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:33:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:33:39,913 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:33:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:33:39,913 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:33:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:33:39,914 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:33:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:33:39,914 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:33:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:33:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:33:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:33:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:33:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:33:39,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:33:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:33:39,916 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:33:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 13:33:39,916 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 13:33:40,149 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:33:40,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:33:41,670 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:33:41,684 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:33:41,684 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:33:41,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:33:41 BoogieIcfgContainer [2021-11-19 13:33:41,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:33:41,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:33:41,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:33:41,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:33:41,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:33:38" (1/3) ... [2021-11-19 13:33:41,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a050de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:33:41, skipping insertion in model container [2021-11-19 13:33:41,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:39" (2/3) ... [2021-11-19 13:33:41,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a050de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:33:41, skipping insertion in model container [2021-11-19 13:33:41,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:33:41" (3/3) ... [2021-11-19 13:33:41,696 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2021-11-19 13:33:41,703 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:33:41,703 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:33:41,762 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:33:41,769 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 [2021-11-19 13:33:41,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:33:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 545 states, 421 states have (on average 1.669833729216152) internal successors, (703), 439 states have internal predecessors, (703), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 13:33:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:33:41,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:41,828 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:41,828 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:41,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1406602472, now seen corresponding path program 1 times [2021-11-19 13:33:41,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:41,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960373836] [2021-11-19 13:33:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:41,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:41,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:41,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:33:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:42,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:42,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:42,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:42,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960373836] [2021-11-19 13:33:42,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960373836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:42,844 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:42,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:33:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297059151] [2021-11-19 13:33:42,849 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:42,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:42,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:42,906 INFO L87 Difference]: Start difference. First operand has 545 states, 421 states have (on average 1.669833729216152) internal successors, (703), 439 states have internal predecessors, (703), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:33:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:43,211 INFO L93 Difference]: Finished difference Result 1085 states and 1796 transitions. [2021-11-19 13:33:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 63 [2021-11-19 13:33:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:43,270 INFO L225 Difference]: With dead ends: 1085 [2021-11-19 13:33:43,270 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 13:33:43,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:43,290 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 16 mSDsluCounter, 2627 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3506 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:43,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3506 Invalid, 52 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 13:33:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 13:33:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 417 states have (on average 1.6474820143884892) internal successors, (687), 434 states have internal predecessors, (687), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 13:33:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 880 transitions. [2021-11-19 13:33:43,433 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 880 transitions. Word has length 63 [2021-11-19 13:33:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:43,434 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 880 transitions. [2021-11-19 13:33:43,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:33:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 880 transitions. [2021-11-19 13:33:43,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 13:33:43,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:43,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:43,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:43,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:43,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:43,659 INFO L85 PathProgramCache]: Analyzing trace with hash -165543453, now seen corresponding path program 1 times [2021-11-19 13:33:43,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:43,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29398686] [2021-11-19 13:33:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:43,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:43,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:43,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:43,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:33:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:43,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:44,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:44,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:44,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29398686] [2021-11-19 13:33:44,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29398686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:44,607 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:44,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:33:44,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638697466] [2021-11-19 13:33:44,609 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:44,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:33:44,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:33:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:33:44,616 INFO L87 Difference]: Start difference. First operand 540 states and 880 transitions. Second operand has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:33:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:44,917 INFO L93 Difference]: Finished difference Result 1068 states and 1752 transitions. [2021-11-19 13:33:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:33:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 68 [2021-11-19 13:33:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:44,927 INFO L225 Difference]: With dead ends: 1068 [2021-11-19 13:33:44,927 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 13:33:44,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:33:44,934 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 118 mSDsluCounter, 5876 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6740 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:44,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6740 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:33:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 13:33:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 13:33:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 425 states have (on average 1.6470588235294117) internal successors, (700), 443 states have internal predecessors, (700), 97 states have call successors, (97), 26 states have call predecessors, (97), 26 states have return successors, (97), 93 states have call predecessors, (97), 96 states have call successors, (97) [2021-11-19 13:33:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 894 transitions. [2021-11-19 13:33:44,999 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 894 transitions. Word has length 68 [2021-11-19 13:33:45,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:45,000 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 894 transitions. [2021-11-19 13:33:45,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:33:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 894 transitions. [2021-11-19 13:33:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:33:45,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:45,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:45,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:45,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:45,232 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash -299374270, now seen corresponding path program 1 times [2021-11-19 13:33:45,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:45,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855356904] [2021-11-19 13:33:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:45,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:45,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:45,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:45,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:33:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:45,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:45,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:45,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:46,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:46,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855356904] [2021-11-19 13:33:46,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855356904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:46,106 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:46,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:33:46,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779620924] [2021-11-19 13:33:46,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:46,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:46,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:46,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:46,110 INFO L87 Difference]: Start difference. First operand 549 states and 894 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:46,463 INFO L93 Difference]: Finished difference Result 1124 states and 1843 transitions. [2021-11-19 13:33:46,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:46,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2021-11-19 13:33:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:46,472 INFO L225 Difference]: With dead ends: 1124 [2021-11-19 13:33:46,472 INFO L226 Difference]: Without dead ends: 563 [2021-11-19 13:33:46,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:46,477 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 136 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:46,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 4027 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:33:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-19 13:33:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 554. [2021-11-19 13:33:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 430 states have (on average 1.5883720930232559) internal successors, (683), 447 states have internal predecessors, (683), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 13:33:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 876 transitions. [2021-11-19 13:33:46,520 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 876 transitions. Word has length 69 [2021-11-19 13:33:46,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:46,520 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 876 transitions. [2021-11-19 13:33:46,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 876 transitions. [2021-11-19 13:33:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 13:33:46,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:46,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:46,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:46,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:46,738 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:46,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1558871751, now seen corresponding path program 1 times [2021-11-19 13:33:46,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:46,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844319134] [2021-11-19 13:33:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:46,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:46,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:46,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:46,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:33:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:47,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:47,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:47,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:47,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844319134] [2021-11-19 13:33:47,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844319134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:47,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:47,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:33:47,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988480103] [2021-11-19 13:33:47,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:47,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:33:47,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:33:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:47,590 INFO L87 Difference]: Start difference. First operand 554 states and 876 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:33:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:47,789 INFO L93 Difference]: Finished difference Result 1066 states and 1706 transitions. [2021-11-19 13:33:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:33:47,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2021-11-19 13:33:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:47,798 INFO L225 Difference]: With dead ends: 1066 [2021-11-19 13:33:47,798 INFO L226 Difference]: Without dead ends: 542 [2021-11-19 13:33:47,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:47,803 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 86 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5760 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:47,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 5760 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-19 13:33:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 533. [2021-11-19 13:33:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 409 states have (on average 1.6014669926650367) internal successors, (655), 426 states have internal predecessors, (655), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 13:33:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 848 transitions. [2021-11-19 13:33:47,839 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 848 transitions. Word has length 71 [2021-11-19 13:33:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:47,840 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 848 transitions. [2021-11-19 13:33:47,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:33:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 848 transitions. [2021-11-19 13:33:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:33:47,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:47,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:47,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:48,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:48,060 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1796600560, now seen corresponding path program 1 times [2021-11-19 13:33:48,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:48,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150975792] [2021-11-19 13:33:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:48,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:48,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:48,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:48,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:33:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:33:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:48,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:49,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:49,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150975792] [2021-11-19 13:33:49,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150975792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:49,034 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:49,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:33:49,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942946178] [2021-11-19 13:33:49,035 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:49,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:33:49,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:49,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:33:49,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:33:49,036 INFO L87 Difference]: Start difference. First operand 533 states and 848 transitions. Second operand has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:33:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:49,312 INFO L93 Difference]: Finished difference Result 1035 states and 1661 transitions. [2021-11-19 13:33:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:33:49,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 74 [2021-11-19 13:33:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:49,320 INFO L225 Difference]: With dead ends: 1035 [2021-11-19 13:33:49,320 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 13:33:49,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:33:49,325 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 73 mSDsluCounter, 5612 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6417 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:49,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 6417 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:33:49,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 13:33:49,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2021-11-19 13:33:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 411 states have (on average 1.5961070559610706) internal successors, (656), 428 states have internal predecessors, (656), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 13:33:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 849 transitions. [2021-11-19 13:33:49,356 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 849 transitions. Word has length 74 [2021-11-19 13:33:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:49,357 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 849 transitions. [2021-11-19 13:33:49,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:33:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 849 transitions. [2021-11-19 13:33:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 13:33:49,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:49,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:49,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:49,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:49,576 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -480673503, now seen corresponding path program 1 times [2021-11-19 13:33:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:49,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433156135] [2021-11-19 13:33:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:49,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:49,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:49,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:49,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:33:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:49,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:33:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:50,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:50,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:50,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433156135] [2021-11-19 13:33:50,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433156135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:50,575 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:50,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 13:33:50,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075231] [2021-11-19 13:33:50,575 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:50,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:33:50,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:33:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:33:50,578 INFO L87 Difference]: Start difference. First operand 535 states and 849 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 13:33:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:51,749 INFO L93 Difference]: Finished difference Result 2001 states and 3262 transitions. [2021-11-19 13:33:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:33:51,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 75 [2021-11-19 13:33:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:51,778 INFO L225 Difference]: With dead ends: 2001 [2021-11-19 13:33:51,779 INFO L226 Difference]: Without dead ends: 1509 [2021-11-19 13:33:51,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:33:51,791 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1568 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 2993 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:51,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 2993 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:33:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-11-19 13:33:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1383. [2021-11-19 13:33:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1077 states have (on average 1.626740947075209) internal successors, (1752), 1111 states have internal predecessors, (1752), 241 states have call successors, (241), 67 states have call predecessors, (241), 64 states have return successors, (254), 220 states have call predecessors, (254), 238 states have call successors, (254) [2021-11-19 13:33:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2247 transitions. [2021-11-19 13:33:51,921 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2247 transitions. Word has length 75 [2021-11-19 13:33:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:51,923 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 2247 transitions. [2021-11-19 13:33:51,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 13:33:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2247 transitions. [2021-11-19 13:33:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 13:33:51,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:51,940 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:51,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:52,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:52,158 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash 693390769, now seen corresponding path program 1 times [2021-11-19 13:33:52,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:52,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91747138] [2021-11-19 13:33:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:52,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:52,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:52,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:33:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:52,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:33:52,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:33:52,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:33:53,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:53,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91747138] [2021-11-19 13:33:53,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91747138] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:53,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:53,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:33:53,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677556718] [2021-11-19 13:33:53,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:53,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:33:53,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:53,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:33:53,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:53,408 INFO L87 Difference]: Start difference. First operand 1383 states and 2247 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:33:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:54,500 INFO L93 Difference]: Finished difference Result 2735 states and 4554 transitions. [2021-11-19 13:33:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2021-11-19 13:33:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:54,518 INFO L225 Difference]: With dead ends: 2735 [2021-11-19 13:33:54,518 INFO L226 Difference]: Without dead ends: 1395 [2021-11-19 13:33:54,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:33:54,531 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 769 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:54,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2034 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:33:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-11-19 13:33:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1395. [2021-11-19 13:33:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1086 states have (on average 1.6215469613259668) internal successors, (1761), 1120 states have internal predecessors, (1761), 241 states have call successors, (241), 70 states have call predecessors, (241), 67 states have return successors, (257), 220 states have call predecessors, (257), 238 states have call successors, (257) [2021-11-19 13:33:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2259 transitions. [2021-11-19 13:33:54,623 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2259 transitions. Word has length 128 [2021-11-19 13:33:54,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:54,624 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 2259 transitions. [2021-11-19 13:33:54,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:33:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2259 transitions. [2021-11-19 13:33:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 13:33:54,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:54,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 13:33:54,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:54,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:54,849 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash 171588742, now seen corresponding path program 1 times [2021-11-19 13:33:54,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:54,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418366620] [2021-11-19 13:33:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:54,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:54,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:54,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:54,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:33:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:55,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:33:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:33:55,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:33:55,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:55,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418366620] [2021-11-19 13:33:55,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418366620] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:55,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:55,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-19 13:33:55,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087669148] [2021-11-19 13:33:55,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:55,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:55,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:55,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:55,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:33:55,938 INFO L87 Difference]: Start difference. First operand 1395 states and 2259 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:56,758 INFO L93 Difference]: Finished difference Result 2961 states and 4760 transitions. [2021-11-19 13:33:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:33:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-11-19 13:33:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:56,784 INFO L225 Difference]: With dead ends: 2961 [2021-11-19 13:33:56,784 INFO L226 Difference]: Without dead ends: 1609 [2021-11-19 13:33:56,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:33:56,800 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 599 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:56,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 3597 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:33:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-11-19 13:33:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1603. [2021-11-19 13:33:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1234 states have (on average 1.5518638573743921) internal successors, (1915), 1260 states have internal predecessors, (1915), 277 states have call successors, (277), 90 states have call predecessors, (277), 91 states have return successors, (326), 264 states have call predecessors, (326), 272 states have call successors, (326) [2021-11-19 13:33:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2518 transitions. [2021-11-19 13:33:56,925 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2518 transitions. Word has length 130 [2021-11-19 13:33:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:56,926 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 2518 transitions. [2021-11-19 13:33:56,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 13:33:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2518 transitions. [2021-11-19 13:33:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:33:56,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:56,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:56,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:57,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:57,152 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:57,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash -870219369, now seen corresponding path program 1 times [2021-11-19 13:33:57,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:57,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122019157] [2021-11-19 13:33:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:57,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:57,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:57,156 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:57,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:33:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:33:57,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:33:57,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:33:58,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:58,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122019157] [2021-11-19 13:33:58,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122019157] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:33:58,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:33:58,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:33:58,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129384932] [2021-11-19 13:33:58,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:33:58,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:33:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:58,313 INFO L87 Difference]: Start difference. First operand 1603 states and 2518 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:33:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:59,446 INFO L93 Difference]: Finished difference Result 3188 states and 5154 transitions. [2021-11-19 13:33:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-19 13:33:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:59,468 INFO L225 Difference]: With dead ends: 3188 [2021-11-19 13:33:59,468 INFO L226 Difference]: Without dead ends: 1628 [2021-11-19 13:33:59,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:33:59,488 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 767 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:59,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 2035 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:33:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-11-19 13:33:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1628. [2021-11-19 13:33:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1254 states have (on average 1.5430622009569377) internal successors, (1935), 1280 states have internal predecessors, (1935), 277 states have call successors, (277), 95 states have call predecessors, (277), 96 states have return successors, (330), 264 states have call predecessors, (330), 272 states have call successors, (330) [2021-11-19 13:33:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2542 transitions. [2021-11-19 13:33:59,636 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2542 transitions. Word has length 131 [2021-11-19 13:33:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:59,638 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2542 transitions. [2021-11-19 13:33:59,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:33:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2542 transitions. [2021-11-19 13:33:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:33:59,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:59,645 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:59,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:59,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:59,865 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:33:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:59,865 INFO L85 PathProgramCache]: Analyzing trace with hash -955446547, now seen corresponding path program 1 times [2021-11-19 13:33:59,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:59,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792397505] [2021-11-19 13:33:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:59,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:59,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:59,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:59,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:34:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:00,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:34:00,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:34:00,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:34:01,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:01,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792397505] [2021-11-19 13:34:01,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792397505] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:01,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:01,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:34:01,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465179381] [2021-11-19 13:34:01,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:01,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:01,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:01,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:01,119 INFO L87 Difference]: Start difference. First operand 1628 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:34:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:02,154 INFO L93 Difference]: Finished difference Result 3243 states and 5203 transitions. [2021-11-19 13:34:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:34:02,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-19 13:34:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:02,186 INFO L225 Difference]: With dead ends: 3243 [2021-11-19 13:34:02,186 INFO L226 Difference]: Without dead ends: 1658 [2021-11-19 13:34:02,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:34:02,204 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 770 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:02,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2035 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:34:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-11-19 13:34:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2021-11-19 13:34:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1279 states have (on average 1.532447224394058) internal successors, (1960), 1305 states have internal predecessors, (1960), 277 states have call successors, (277), 100 states have call predecessors, (277), 101 states have return successors, (334), 264 states have call predecessors, (334), 272 states have call successors, (334) [2021-11-19 13:34:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2571 transitions. [2021-11-19 13:34:02,315 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2571 transitions. Word has length 134 [2021-11-19 13:34:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:02,315 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2571 transitions. [2021-11-19 13:34:02,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:34:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2571 transitions. [2021-11-19 13:34:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:34:02,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:02,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:02,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:02,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:02,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash -459580597, now seen corresponding path program 1 times [2021-11-19 13:34:02,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:02,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666390017] [2021-11-19 13:34:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:02,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:02,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:02,546 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:02,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:34:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:34:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:34:03,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:34:03,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:03,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666390017] [2021-11-19 13:34:03,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666390017] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:03,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:03,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:34:03,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831097658] [2021-11-19 13:34:03,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:03,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:03,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:03,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:34:03,867 INFO L87 Difference]: Start difference. First operand 1658 states and 2571 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:34:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:04,893 INFO L93 Difference]: Finished difference Result 3308 states and 5262 transitions. [2021-11-19 13:34:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:34:04,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-19 13:34:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:04,911 INFO L225 Difference]: With dead ends: 3308 [2021-11-19 13:34:04,911 INFO L226 Difference]: Without dead ends: 1693 [2021-11-19 13:34:04,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:34:04,926 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 770 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:04,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2035 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:34:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-11-19 13:34:05,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1693. [2021-11-19 13:34:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1309 states have (on average 1.520244461420932) internal successors, (1990), 1335 states have internal predecessors, (1990), 277 states have call successors, (277), 105 states have call predecessors, (277), 106 states have return successors, (338), 264 states have call predecessors, (338), 272 states have call successors, (338) [2021-11-19 13:34:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2605 transitions. [2021-11-19 13:34:05,020 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2605 transitions. Word has length 137 [2021-11-19 13:34:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:05,020 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 2605 transitions. [2021-11-19 13:34:05,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:34:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2605 transitions. [2021-11-19 13:34:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 13:34:05,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:05,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:05,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:05,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:05,242 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:05,242 INFO L85 PathProgramCache]: Analyzing trace with hash -222877143, now seen corresponding path program 1 times [2021-11-19 13:34:05,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:05,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682358338] [2021-11-19 13:34:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:05,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:05,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:05,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:05,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:34:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:34:06,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:34:06,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:06,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682358338] [2021-11-19 13:34:06,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682358338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:06,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1265110004] [2021-11-19 13:34:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:06,897 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:06,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:06,900 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:06,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-19 13:34:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:34:07,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:34:07,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:34:07,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1265110004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:07,975 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:34:07,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 13:34:07,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581977131] [2021-11-19 13:34:07,979 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:07,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:34:07,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:34:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:07,986 INFO L87 Difference]: Start difference. First operand 1693 states and 2605 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 13:34:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:08,129 INFO L93 Difference]: Finished difference Result 4977 states and 7785 transitions. [2021-11-19 13:34:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:34:08,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 140 [2021-11-19 13:34:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:08,167 INFO L225 Difference]: With dead ends: 4977 [2021-11-19 13:34:08,168 INFO L226 Difference]: Without dead ends: 3330 [2021-11-19 13:34:08,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:08,184 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 829 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:08,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 1793 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-11-19 13:34:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3318. [2021-11-19 13:34:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3318 states, 2569 states have (on average 1.5247177890229662) internal successors, (3917), 2618 states have internal predecessors, (3917), 539 states have call successors, (539), 205 states have call predecessors, (539), 209 states have return successors, (705), 518 states have call predecessors, (705), 529 states have call successors, (705) [2021-11-19 13:34:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 5161 transitions. [2021-11-19 13:34:08,443 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 5161 transitions. Word has length 140 [2021-11-19 13:34:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:08,444 INFO L470 AbstractCegarLoop]: Abstraction has 3318 states and 5161 transitions. [2021-11-19 13:34:08,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 13:34:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 5161 transitions. [2021-11-19 13:34:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 13:34:08,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:08,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:08,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:08,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:08,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:08,856 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash 171489643, now seen corresponding path program 1 times [2021-11-19 13:34:08,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:08,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587313564] [2021-11-19 13:34:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:08,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:08,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:08,858 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:08,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:34:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:09,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:34:09,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:34:10,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587313564] [2021-11-19 13:34:10,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587313564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1494793386] [2021-11-19 13:34:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:10,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:10,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:10,337 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:10,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 13:34:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:34:11,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:34:11,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1494793386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:11,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68218267] [2021-11-19 13:34:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:11,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:34:11,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:34:11,757 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:34:11,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 13:34:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:11,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:11,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:34:12,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:34:13,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68218267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:13,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:34:13,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 13:34:13,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017055520] [2021-11-19 13:34:13,091 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:34:13,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:34:13,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:13,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:34:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:34:13,097 INFO L87 Difference]: Start difference. First operand 3318 states and 5161 transitions. Second operand has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (30), 6 states have call predecessors, (30), 12 states have return successors, (31), 12 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 13:34:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:23,960 INFO L93 Difference]: Finished difference Result 11235 states and 18161 transitions. [2021-11-19 13:34:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:34:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (30), 6 states have call predecessors, (30), 12 states have return successors, (31), 12 states have call predecessors, (31), 8 states have call successors, (31) Word has length 140 [2021-11-19 13:34:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:24,054 INFO L225 Difference]: With dead ends: 11235 [2021-11-19 13:34:24,055 INFO L226 Difference]: Without dead ends: 7960 [2021-11-19 13:34:24,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-19 13:34:24,094 INFO L933 BasicCegarLoop]: 1649 mSDtfsCounter, 2376 mSDsluCounter, 4769 mSDsCounter, 0 mSdLazyCounter, 9687 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2456 SdHoareTripleChecker+Valid, 6418 SdHoareTripleChecker+Invalid, 10666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 9687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:24,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2456 Valid, 6418 Invalid, 10666 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [979 Valid, 9687 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-19 13:34:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-11-19 13:34:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7024. [2021-11-19 13:34:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7024 states, 5363 states have (on average 1.5127727018459818) internal successors, (8113), 5487 states have internal predecessors, (8113), 1177 states have call successors, (1177), 407 states have call predecessors, (1177), 483 states have return successors, (1731), 1187 states have call predecessors, (1731), 1157 states have call successors, (1731) [2021-11-19 13:34:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7024 states to 7024 states and 11021 transitions. [2021-11-19 13:34:24,800 INFO L78 Accepts]: Start accepts. Automaton has 7024 states and 11021 transitions. Word has length 140 [2021-11-19 13:34:24,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:24,801 INFO L470 AbstractCegarLoop]: Abstraction has 7024 states and 11021 transitions. [2021-11-19 13:34:24,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 14 states have internal predecessors, (159), 8 states have call successors, (30), 6 states have call predecessors, (30), 12 states have return successors, (31), 12 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 13:34:24,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7024 states and 11021 transitions. [2021-11-19 13:34:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 13:34:24,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:24,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:24,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:25,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-19 13:34:25,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-19 13:34:25,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:25,442 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash -535275790, now seen corresponding path program 1 times [2021-11-19 13:34:25,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:25,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359398593] [2021-11-19 13:34:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:25,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:25,445 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:25,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:34:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:25,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:34:25,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:34:26,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:34:26,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:26,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359398593] [2021-11-19 13:34:26,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359398593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:26,466 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:26,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 13:34:26,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282002774] [2021-11-19 13:34:26,467 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:26,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:34:26,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:34:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:34:26,469 INFO L87 Difference]: Start difference. First operand 7024 states and 11021 transitions. Second operand has 10 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 13:34:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:27,150 INFO L93 Difference]: Finished difference Result 13712 states and 21556 transitions. [2021-11-19 13:34:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:34:27,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 143 [2021-11-19 13:34:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:27,216 INFO L225 Difference]: With dead ends: 13712 [2021-11-19 13:34:27,216 INFO L226 Difference]: Without dead ends: 6721 [2021-11-19 13:34:27,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:34:27,249 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 95 mSDsluCounter, 4796 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 5601 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:27,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 5601 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-19 13:34:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6691. [2021-11-19 13:34:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6691 states, 5106 states have (on average 1.5201723462593029) internal successors, (7762), 5229 states have internal predecessors, (7762), 1133 states have call successors, (1133), 377 states have call predecessors, (1133), 451 states have return successors, (1615), 1142 states have call predecessors, (1615), 1113 states have call successors, (1615) [2021-11-19 13:34:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6691 states to 6691 states and 10510 transitions. [2021-11-19 13:34:27,752 INFO L78 Accepts]: Start accepts. Automaton has 6691 states and 10510 transitions. Word has length 143 [2021-11-19 13:34:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:27,753 INFO L470 AbstractCegarLoop]: Abstraction has 6691 states and 10510 transitions. [2021-11-19 13:34:27,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 3 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 13:34:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6691 states and 10510 transitions. [2021-11-19 13:34:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 13:34:27,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:27,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:27,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:27,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:27,982 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1545312976, now seen corresponding path program 1 times [2021-11-19 13:34:27,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:27,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534455127] [2021-11-19 13:34:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:27,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:27,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:27,986 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:28,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:34:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:28,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:34:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:34:28,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 13:34:29,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:29,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534455127] [2021-11-19 13:34:29,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534455127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:29,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [287013040] [2021-11-19 13:34:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:29,567 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:29,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:29,569 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:29,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 13:34:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:34:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:34:30,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 13:34:30,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [287013040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:30,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215089180] [2021-11-19 13:34:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:30,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:34:30,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:34:30,904 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:34:30,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 13:34:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:31,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:34:31,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:34:31,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 13:34:32,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215089180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:32,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:34:32,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 13:34:32,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542173549] [2021-11-19 13:34:32,241 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:34:32,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:34:32,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:32,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:34:32,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:34:32,243 INFO L87 Difference]: Start difference. First operand 6691 states and 10510 transitions. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (31), 6 states have call predecessors, (31), 10 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 13:34:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:39,277 INFO L93 Difference]: Finished difference Result 17082 states and 27484 transitions. [2021-11-19 13:34:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:34:39,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (31), 6 states have call predecessors, (31), 10 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) Word has length 146 [2021-11-19 13:34:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:39,358 INFO L225 Difference]: With dead ends: 17082 [2021-11-19 13:34:39,359 INFO L226 Difference]: Without dead ends: 10431 [2021-11-19 13:34:39,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 861 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:34:39,476 INFO L933 BasicCegarLoop]: 1513 mSDtfsCounter, 3736 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 6169 mSolverCounterSat, 1186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3807 SdHoareTripleChecker+Valid, 4630 SdHoareTripleChecker+Invalid, 7355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 6169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:39,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3807 Valid, 4630 Invalid, 7355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1186 Valid, 6169 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-19 13:34:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-11-19 13:34:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 10045. [2021-11-19 13:34:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 7632 states have (on average 1.5186058700209644) internal successors, (11590), 7813 states have internal predecessors, (11590), 1727 states have call successors, (1727), 549 states have call predecessors, (1727), 685 states have return successors, (2497), 1774 states have call predecessors, (2497), 1697 states have call successors, (2497) [2021-11-19 13:34:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 15814 transitions. [2021-11-19 13:34:40,308 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 15814 transitions. Word has length 146 [2021-11-19 13:34:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:40,309 INFO L470 AbstractCegarLoop]: Abstraction has 10045 states and 15814 transitions. [2021-11-19 13:34:40,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 8 states have call successors, (31), 6 states have call predecessors, (31), 10 states have return successors, (31), 10 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-19 13:34:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 15814 transitions. [2021-11-19 13:34:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 13:34:40,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:40,316 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-19 13:34:40,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:40,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:40,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:40,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:40,931 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:40,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1681512240, now seen corresponding path program 1 times [2021-11-19 13:34:40,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:40,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930426983] [2021-11-19 13:34:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:40,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:40,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:40,934 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:40,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:34:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:34:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:34:41,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:34:42,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:42,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930426983] [2021-11-19 13:34:42,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930426983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:42,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [361572272] [2021-11-19 13:34:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:42,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:42,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:34:42,086 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:34:42,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 13:34:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:42,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:34:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:34:42,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:34:43,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [361572272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:43,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648784285] [2021-11-19 13:34:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:43,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:34:43,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:34:43,333 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:34:43,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 13:34:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:43,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:34:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:34:43,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:34:44,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648784285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:34:44,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:34:44,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 13:34:44,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686984507] [2021-11-19 13:34:44,409 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:34:44,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:34:44,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:44,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:34:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:34:44,411 INFO L87 Difference]: Start difference. First operand 10045 states and 15814 transitions. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 13:34:52,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:52,939 INFO L93 Difference]: Finished difference Result 37277 states and 61115 transitions. [2021-11-19 13:34:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:34:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 147 [2021-11-19 13:34:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:53,170 INFO L225 Difference]: With dead ends: 37277 [2021-11-19 13:34:53,171 INFO L226 Difference]: Without dead ends: 27248 [2021-11-19 13:34:53,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:34:53,281 INFO L933 BasicCegarLoop]: 1336 mSDtfsCounter, 3512 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 5483 mSolverCounterSat, 1083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3611 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 6566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1083 IncrementalHoareTripleChecker+Valid, 5483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:53,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3611 Valid, 3241 Invalid, 6566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1083 Valid, 5483 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 13:34:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27248 states. [2021-11-19 13:34:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27248 to 24098. [2021-11-19 13:34:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24098 states, 18247 states have (on average 1.4978900641201294) internal successors, (27332), 18676 states have internal predecessors, (27332), 4139 states have call successors, (4139), 1434 states have call predecessors, (4139), 1711 states have return successors, (6584), 4217 states have call predecessors, (6584), 4076 states have call successors, (6584) [2021-11-19 13:34:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24098 states to 24098 states and 38055 transitions. [2021-11-19 13:34:55,804 INFO L78 Accepts]: Start accepts. Automaton has 24098 states and 38055 transitions. Word has length 147 [2021-11-19 13:34:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:55,805 INFO L470 AbstractCegarLoop]: Abstraction has 24098 states and 38055 transitions. [2021-11-19 13:34:55,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 6 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 13:34:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 24098 states and 38055 transitions. [2021-11-19 13:34:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 13:34:55,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:55,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:55,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:56,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:56,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:56,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:56,641 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2057114528, now seen corresponding path program 1 times [2021-11-19 13:34:56,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:56,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703504657] [2021-11-19 13:34:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:56,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:56,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:56,646 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:56,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:34:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:34:56,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 13:34:57,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 13:34:57,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:57,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703504657] [2021-11-19 13:34:57,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703504657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:57,949 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:57,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:34:57,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855395629] [2021-11-19 13:34:57,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:57,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:34:57,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:34:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:34:57,952 INFO L87 Difference]: Start difference. First operand 24098 states and 38055 transitions. Second operand has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 8 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 13:35:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:07,248 INFO L93 Difference]: Finished difference Result 71886 states and 120766 transitions. [2021-11-19 13:35:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:35:07,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 8 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 149 [2021-11-19 13:35:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:07,671 INFO L225 Difference]: With dead ends: 71886 [2021-11-19 13:35:07,671 INFO L226 Difference]: Without dead ends: 47720 [2021-11-19 13:35:07,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:35:07,970 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 5234 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 5456 mSolverCounterSat, 1597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5341 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 7053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1597 IncrementalHoareTripleChecker+Valid, 5456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:07,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5341 Valid, 3055 Invalid, 7053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1597 Valid, 5456 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-19 13:35:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47720 states. [2021-11-19 13:35:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47720 to 41342. [2021-11-19 13:35:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41342 states, 30698 states have (on average 1.4865463548113884) internal successors, (45634), 31675 states have internal predecessors, (45634), 7748 states have call successors, (7748), 2187 states have call predecessors, (7748), 2895 states have return successors, (12781), 8064 states have call predecessors, (12781), 7649 states have call successors, (12781) [2021-11-19 13:35:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41342 states to 41342 states and 66163 transitions. [2021-11-19 13:35:11,878 INFO L78 Accepts]: Start accepts. Automaton has 41342 states and 66163 transitions. Word has length 149 [2021-11-19 13:35:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:11,879 INFO L470 AbstractCegarLoop]: Abstraction has 41342 states and 66163 transitions. [2021-11-19 13:35:11,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 8 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 13:35:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 41342 states and 66163 transitions. [2021-11-19 13:35:11,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 13:35:11,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:11,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:11,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:12,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:12,102 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:12,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:12,102 INFO L85 PathProgramCache]: Analyzing trace with hash 128819519, now seen corresponding path program 1 times [2021-11-19 13:35:12,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:12,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239941571] [2021-11-19 13:35:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:12,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:12,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:12,105 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:12,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:35:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:12,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:35:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:35:12,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 13:35:13,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:13,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239941571] [2021-11-19 13:35:13,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239941571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:13,307 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:13,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:35:13,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606945746] [2021-11-19 13:35:13,307 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:13,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:35:13,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:35:13,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:35:13,309 INFO L87 Difference]: Start difference. First operand 41342 states and 66163 transitions. Second operand has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 8 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2021-11-19 13:35:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:22,106 INFO L93 Difference]: Finished difference Result 85789 states and 139531 transitions. [2021-11-19 13:35:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:35:22,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 8 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 149 [2021-11-19 13:35:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:22,750 INFO L225 Difference]: With dead ends: 85789 [2021-11-19 13:35:22,750 INFO L226 Difference]: Without dead ends: 50025 [2021-11-19 13:35:23,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:35:23,058 INFO L933 BasicCegarLoop]: 1098 mSDtfsCounter, 4323 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 3771 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4411 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 4834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 3771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:23,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4411 Valid, 2387 Invalid, 4834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 3771 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-19 13:35:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50025 states. [2021-11-19 13:35:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50025 to 44663. [2021-11-19 13:35:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44663 states, 33101 states have (on average 1.480317815171747) internal successors, (49000), 34240 states have internal predecessors, (49000), 8324 states have call successors, (8324), 2313 states have call predecessors, (8324), 3237 states have return successors, (14005), 8694 states have call predecessors, (14005), 8225 states have call successors, (14005) [2021-11-19 13:35:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44663 states to 44663 states and 71329 transitions. [2021-11-19 13:35:26,669 INFO L78 Accepts]: Start accepts. Automaton has 44663 states and 71329 transitions. Word has length 149 [2021-11-19 13:35:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:26,670 INFO L470 AbstractCegarLoop]: Abstraction has 44663 states and 71329 transitions. [2021-11-19 13:35:26,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 8 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2021-11-19 13:35:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 44663 states and 71329 transitions. [2021-11-19 13:35:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 13:35:26,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:26,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 13:35:26,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:26,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:26,915 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1927228095, now seen corresponding path program 1 times [2021-11-19 13:35:26,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:26,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802163313] [2021-11-19 13:35:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:26,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:26,918 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:26,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 13:35:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:27,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:35:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:35:27,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:35:28,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:28,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802163313] [2021-11-19 13:35:28,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802163313] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:35:28,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:35:28,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-19 13:35:28,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667462182] [2021-11-19 13:35:28,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:28,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:35:28,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:28,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:35:28,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:35:28,440 INFO L87 Difference]: Start difference. First operand 44663 states and 71329 transitions. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 9 states have internal predecessors, (106), 6 states have call successors, (18), 5 states have call predecessors, (18), 8 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-19 13:35:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:38,754 INFO L93 Difference]: Finished difference Result 84796 states and 137338 transitions. [2021-11-19 13:35:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 13:35:38,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 9 states have internal predecessors, (106), 6 states have call successors, (18), 5 states have call predecessors, (18), 8 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) Word has length 151 [2021-11-19 13:35:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:39,374 INFO L225 Difference]: With dead ends: 84796 [2021-11-19 13:35:39,374 INFO L226 Difference]: Without dead ends: 45711 [2021-11-19 13:35:39,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-11-19 13:35:39,813 INFO L933 BasicCegarLoop]: 1398 mSDtfsCounter, 2637 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 6877 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 4534 SdHoareTripleChecker+Invalid, 7585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 6877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:39,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 4534 Invalid, 7585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 6877 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 13:35:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45711 states. [2021-11-19 13:35:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45711 to 44588. [2021-11-19 13:35:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44588 states, 33080 states have (on average 1.479353083434099) internal successors, (48937), 34195 states have internal predecessors, (48937), 8282 states have call successors, (8282), 2295 states have call predecessors, (8282), 3225 states have return successors, (13969), 8682 states have call predecessors, (13969), 8183 states have call successors, (13969) [2021-11-19 13:35:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44588 states to 44588 states and 71188 transitions. [2021-11-19 13:35:43,458 INFO L78 Accepts]: Start accepts. Automaton has 44588 states and 71188 transitions. Word has length 151 [2021-11-19 13:35:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:43,458 INFO L470 AbstractCegarLoop]: Abstraction has 44588 states and 71188 transitions. [2021-11-19 13:35:43,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 9 states have internal predecessors, (106), 6 states have call successors, (18), 5 states have call predecessors, (18), 8 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-19 13:35:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 44588 states and 71188 transitions. [2021-11-19 13:35:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 13:35:43,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:43,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:43,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:43,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:43,687 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1166452067, now seen corresponding path program 1 times [2021-11-19 13:35:43,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:43,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833647416] [2021-11-19 13:35:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:43,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:43,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:43,692 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:43,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:35:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:44,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:35:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:35:44,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 13:35:45,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:45,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833647416] [2021-11-19 13:35:45,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833647416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:45,378 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:45,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 13:35:45,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955370334] [2021-11-19 13:35:45,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:45,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:35:45,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:45,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:35:45,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:35:45,380 INFO L87 Difference]: Start difference. First operand 44588 states and 71188 transitions. Second operand has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 7 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-19 13:36:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:01,538 INFO L93 Difference]: Finished difference Result 125683 states and 207609 transitions. [2021-11-19 13:36:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:36:01,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 7 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) Word has length 154 [2021-11-19 13:36:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:02,406 INFO L225 Difference]: With dead ends: 125683 [2021-11-19 13:36:02,406 INFO L226 Difference]: Without dead ends: 86163 [2021-11-19 13:36:02,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:36:02,784 INFO L933 BasicCegarLoop]: 1034 mSDtfsCounter, 3942 mSDsluCounter, 2817 mSDsCounter, 0 mSdLazyCounter, 7795 mSolverCounterSat, 1136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4037 SdHoareTripleChecker+Valid, 3851 SdHoareTripleChecker+Invalid, 8931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1136 IncrementalHoareTripleChecker+Valid, 7795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:02,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4037 Valid, 3851 Invalid, 8931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1136 Valid, 7795 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2021-11-19 13:36:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86163 states. [2021-11-19 13:36:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86163 to 77969. [2021-11-19 13:36:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77969 states, 57710 states have (on average 1.4715473921330793) internal successors, (84923), 59707 states have internal predecessors, (84923), 14482 states have call successors, (14482), 4104 states have call predecessors, (14482), 5776 states have return successors, (24810), 15210 states have call predecessors, (24810), 14359 states have call successors, (24810) [2021-11-19 13:36:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77969 states to 77969 states and 124215 transitions. [2021-11-19 13:36:09,359 INFO L78 Accepts]: Start accepts. Automaton has 77969 states and 124215 transitions. Word has length 154 [2021-11-19 13:36:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:09,360 INFO L470 AbstractCegarLoop]: Abstraction has 77969 states and 124215 transitions. [2021-11-19 13:36:09,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.214285714285714) internal successors, (157), 12 states have internal predecessors, (157), 7 states have call successors, (30), 6 states have call predecessors, (30), 7 states have return successors, (29), 9 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-19 13:36:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 77969 states and 124215 transitions. [2021-11-19 13:36:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 13:36:09,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:09,367 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:09,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:09,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:09,582 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash -598786686, now seen corresponding path program 1 times [2021-11-19 13:36:09,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:09,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466004356] [2021-11-19 13:36:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:09,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:09,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:09,584 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:09,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a89a478-27d8-4bda-b3d0-1b67a7765814/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 13:36:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:36:09,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:36:10,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 13:36:10,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:10,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466004356] [2021-11-19 13:36:10,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466004356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:10,584 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:10,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 13:36:10,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335532503] [2021-11-19 13:36:10,584 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:10,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:36:10,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:36:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:36:10,586 INFO L87 Difference]: Start difference. First operand 77969 states and 124215 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24)