./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/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_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:33:16,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:33:16,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:33:16,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:33:16,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:33:16,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:33:16,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:33:16,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:33:16,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:33:16,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:33:16,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:33:16,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:33:16,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:33:16,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:33:16,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:33:16,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:33:16,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:33:16,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:33:16,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:33:16,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:33:16,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:33:16,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:33:16,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:33:16,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:33:16,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:33:16,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:33:16,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:33:16,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:33:16,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:33:16,532 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:33:16,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:33:16,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:33:16,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:33:16,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:33:16,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:33:16,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:33:16,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:33:16,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:33:16,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:33:16,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:33:16,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:33:16,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:33:16,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:33:16,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:33:16,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:33:16,591 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:33:16,591 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:33:16,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:33:16,591 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:33:16,592 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:33:16,592 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:33:16,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:33:16,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:33:16,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:33:16,594 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:33:16,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:33:16,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:33:16,595 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:33:16,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:33:16,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:33:16,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:33:16,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:33:16,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:33:16,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:33:16,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:33:16,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:33:16,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:33:16,598 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:33:16,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:33:16,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:33:16,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:33:16,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:33:16,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:33:16,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:16,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:33:16,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:33:16,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:33:16,602 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:33:16,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:33:16,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:33:16,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:33:16,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:33:16,603 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_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2021-11-13 02:33:16,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:33:16,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:33:16,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:33:16,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:33:16,925 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:33:16,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-13 02:33:17,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data/2bd3403bb/cadf0cc4b1d4454c98fad11bbbc313d2/FLAG9e432decb [2021-11-13 02:33:17,676 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:33:17,677 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-13 02:33:17,698 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data/2bd3403bb/cadf0cc4b1d4454c98fad11bbbc313d2/FLAG9e432decb [2021-11-13 02:33:17,838 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data/2bd3403bb/cadf0cc4b1d4454c98fad11bbbc313d2 [2021-11-13 02:33:17,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:33:17,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:33:17,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:17,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:33:17,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:33:17,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:17" (1/1) ... [2021-11-13 02:33:17,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b6f3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:17, skipping insertion in model container [2021-11-13 02:33:17,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:17" (1/1) ... [2021-11-13 02:33:17,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:33:17,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:33:18,563 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-13 02:33:18,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:18,578 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:33:18,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4eb4c023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:18, skipping insertion in model container [2021-11-13 02:33:18,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:18,579 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:33:18,581 INFO L158 Benchmark]: Toolchain (without parser) took 738.16ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 46.4MB in the beginning and 70.0MB in the end (delta: -23.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:33:18,581 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 86.0MB. Free memory was 65.7MB in the beginning and 65.6MB in the end (delta: 36.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:33:18,582 INFO L158 Benchmark]: CACSL2BoogieTranslator took 723.69ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 64.9MB in the beginning and 70.0MB in the end (delta: -5.2MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2021-11-13 02:33:18,584 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 86.0MB. Free memory was 65.7MB in the beginning and 65.6MB in the end (delta: 36.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 723.69ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 64.9MB in the beginning and 70.0MB in the end (delta: -5.2MB). Peak memory consumption was 15.0MB. 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_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/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_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:33:20,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:33:20,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:33:20,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:33:20,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:33:20,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:33:20,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:33:20,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:33:20,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:33:20,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:33:20,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:33:20,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:33:20,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:33:20,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:33:20,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:33:20,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:33:20,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:33:20,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:33:20,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:33:20,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:33:20,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:33:20,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:33:20,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:33:20,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:33:20,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:33:20,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:33:20,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:33:20,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:33:20,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:33:20,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:33:20,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:33:20,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:33:20,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:33:20,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:33:20,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:33:20,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:33:21,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:33:21,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:33:21,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:33:21,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:33:21,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:33:21,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:33:21,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:33:21,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:33:21,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:33:21,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:33:21,062 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:33:21,062 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:33:21,062 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:33:21,063 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:33:21,063 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:33:21,063 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:33:21,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:33:21,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:33:21,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:33:21,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:33:21,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:33:21,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:33:21,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:33:21,067 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:33:21,067 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:33:21,067 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:33:21,067 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:33:21,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:33:21,068 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:33:21,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:33:21,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:33:21,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:33:21,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:33:21,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:21,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:33:21,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:33:21,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:33:21,070 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:33:21,070 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:21,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:33:21,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:33:21,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:33:21,071 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_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2021-11-13 02:33:21,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:33:21,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:33:21,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:33:21,505 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:33:21,506 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:33:21,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-13 02:33:21,588 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data/fde15dd56/2d5a609663ab4c398f2d40d357bad7ec/FLAG2b1bdf722 [2021-11-13 02:33:22,281 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:33:22,282 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-13 02:33:22,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data/fde15dd56/2d5a609663ab4c398f2d40d357bad7ec/FLAG2b1bdf722 [2021-11-13 02:33:22,446 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/data/fde15dd56/2d5a609663ab4c398f2d40d357bad7ec [2021-11-13 02:33:22,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:33:22,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:33:22,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:22,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:33:22,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:33:22,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:22" (1/1) ... [2021-11-13 02:33:22,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a58c0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:22, skipping insertion in model container [2021-11-13 02:33:22,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:22" (1/1) ... [2021-11-13 02:33:22,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:33:22,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:33:23,139 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-13 02:33:23,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:23,155 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:33:23,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:33:23,279 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-13 02:33:23,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:23,285 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:33:23,422 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-13 02:33:23,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:23,466 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:33:23,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23 WrapperNode [2021-11-13 02:33:23,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:23,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:33:23,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:33:23,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:33:23,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:33:23,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:33:23,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:33:23,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:33:23,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:33:23,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:33:23,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:33:23,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:33:23,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (1/1) ... [2021-11-13 02:33:23,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:23,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:33:23,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:33:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 02:33:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 02:33:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-13 02:33:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-13 02:33:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:33:23,845 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-13 02:33:23,845 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-13 02:33:23,845 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 02:33:23,845 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 02:33:23,845 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-13 02:33:23,846 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-13 02:33:23,846 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 02:33:23,846 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 02:33:23,846 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-13 02:33:23,846 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-13 02:33:23,846 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 02:33:23,847 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 02:33:23,847 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 02:33:23,847 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 02:33:23,847 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 02:33:23,847 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 02:33:23,847 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-13 02:33:23,848 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-13 02:33:23,848 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 02:33:23,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 02:33:23,848 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 02:33:23,848 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 02:33:23,848 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 02:33:23,849 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 02:33:23,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:33:23,849 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-13 02:33:23,850 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-13 02:33:23,851 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 02:33:23,851 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 02:33:23,851 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 02:33:23,851 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 02:33:23,851 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 02:33:23,852 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 02:33:23,852 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 02:33:23,852 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 02:33:23,852 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 02:33:23,852 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 02:33:23,852 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 02:33:23,853 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 02:33:23,853 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 02:33:23,853 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 02:33:23,853 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 02:33:23,854 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 02:33:23,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:33:23,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:33:23,855 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 02:33:23,856 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 02:33:23,857 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-13 02:33:23,857 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-13 02:33:28,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:33:28,116 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:33:28,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:28 BoogieIcfgContainer [2021-11-13 02:33:28,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:33:28,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:33:28,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:33:28,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:33:28,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:33:22" (1/3) ... [2021-11-13 02:33:28,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e051e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:33:28, skipping insertion in model container [2021-11-13 02:33:28,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:23" (2/3) ... [2021-11-13 02:33:28,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e051e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:33:28, skipping insertion in model container [2021-11-13 02:33:28,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:28" (3/3) ... [2021-11-13 02:33:28,130 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2021-11-13 02:33:28,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:33:28,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:33:28,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:33:28,206 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:33:28,207 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:33:28,244 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) [2021-11-13 02:33:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 02:33:28,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:28,260 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] [2021-11-13 02:33:28,260 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1406602472, now seen corresponding path program 1 times [2021-11-13 02:33:28,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:28,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440021685] [2021-11-13 02:33:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:28,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:28,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:28,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:33:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:29,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:29,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:29,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440021685] [2021-11-13 02:33:29,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440021685] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:29,306 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:29,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:33:29,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018678170] [2021-11-13 02:33:29,309 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:29,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:33:29,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:33:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:29,366 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) [2021-11-13 02:33:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:29,655 INFO L93 Difference]: Finished difference Result 1085 states and 1796 transitions. [2021-11-13 02:33:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:33:29,658 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 [2021-11-13 02:33:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:29,693 INFO L225 Difference]: With dead ends: 1085 [2021-11-13 02:33:29,694 INFO L226 Difference]: Without dead ends: 540 [2021-11-13 02:33:29,712 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 [2021-11-13 02:33:29,718 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 16 mSDsluCounter, 2627 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3506 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.76ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.24ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:29,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 3506 Invalid, 52 Unknown, 0 Unchecked, 27.76ms Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 72.24ms Time] [2021-11-13 02:33:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-13 02:33:29,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-13 02:33:29,833 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) [2021-11-13 02:33:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 880 transitions. [2021-11-13 02:33:29,843 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 880 transitions. Word has length 63 [2021-11-13 02:33:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:29,844 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 880 transitions. [2021-11-13 02:33:29,844 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) [2021-11-13 02:33:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 880 transitions. [2021-11-13 02:33:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 02:33:29,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:29,850 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] [2021-11-13 02:33:29,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 02:33:30,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:30,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash -165543453, now seen corresponding path program 1 times [2021-11-13 02:33:30,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:30,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985061713] [2021-11-13 02:33:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:30,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:30,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:30,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:33:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:30,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:30,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:31,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:31,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985061713] [2021-11-13 02:33:31,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985061713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:31,134 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:31,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:33:31,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824324302] [2021-11-13 02:33:31,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:31,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:33:31,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:31,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:33:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:33:31,138 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) [2021-11-13 02:33:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:31,375 INFO L93 Difference]: Finished difference Result 1068 states and 1752 transitions. [2021-11-13 02:33:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:33:31,379 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 [2021-11-13 02:33:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:31,387 INFO L225 Difference]: With dead ends: 1068 [2021-11-13 02:33:31,387 INFO L226 Difference]: Without dead ends: 549 [2021-11-13 02:33:31,391 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 [2021-11-13 02:33:31,393 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 118 mSDsluCounter, 5876 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6740 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:31,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6740 Invalid, 98 Unknown, 0 Unchecked, 16.37ms Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 152.62ms Time] [2021-11-13 02:33:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-13 02:33:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-13 02:33:31,434 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) [2021-11-13 02:33:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 894 transitions. [2021-11-13 02:33:31,443 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 894 transitions. Word has length 68 [2021-11-13 02:33:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:31,444 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 894 transitions. [2021-11-13 02:33:31,445 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) [2021-11-13 02:33:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 894 transitions. [2021-11-13 02:33:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 02:33:31,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:31,454 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] [2021-11-13 02:33:31,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:31,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:31,680 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash -299374270, now seen corresponding path program 1 times [2021-11-13 02:33:31,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:31,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058110926] [2021-11-13 02:33:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:31,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:31,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:31,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:31,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:33:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:32,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:33:32,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:32,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:32,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:32,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058110926] [2021-11-13 02:33:32,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058110926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:32,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:32,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:33:32,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504397079] [2021-11-13 02:33:32,501 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:32,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:33:32,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:33:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:32,502 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) [2021-11-13 02:33:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:32,803 INFO L93 Difference]: Finished difference Result 1124 states and 1843 transitions. [2021-11-13 02:33:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:33:32,805 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 [2021-11-13 02:33:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:32,811 INFO L225 Difference]: With dead ends: 1124 [2021-11-13 02:33:32,811 INFO L226 Difference]: Without dead ends: 563 [2021-11-13 02:33:32,814 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 [2021-11-13 02:33:32,815 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 136 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 199.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.89ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.94ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:32,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 4027 Invalid, 203 Unknown, 0 Unchecked, 10.89ms Time], IncrementalHoareTripleChecker [35 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 228.94ms Time] [2021-11-13 02:33:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-13 02:33:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 554. [2021-11-13 02:33:32,839 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) [2021-11-13 02:33:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 876 transitions. [2021-11-13 02:33:32,845 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 876 transitions. Word has length 69 [2021-11-13 02:33:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:32,846 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 876 transitions. [2021-11-13 02:33:32,846 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) [2021-11-13 02:33:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 876 transitions. [2021-11-13 02:33:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 02:33:32,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:32,848 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] [2021-11-13 02:33:32,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:33,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:33,062 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1558871751, now seen corresponding path program 1 times [2021-11-13 02:33:33,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:33,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007969455] [2021-11-13 02:33:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:33,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:33,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:33,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:33,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:33:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:33:33,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:33,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:34,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:34,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007969455] [2021-11-13 02:33:34,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007969455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:34,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:34,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 02:33:34,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045878841] [2021-11-13 02:33:34,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:34,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:33:34,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:33:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:33:34,190 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) [2021-11-13 02:33:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:34,426 INFO L93 Difference]: Finished difference Result 1066 states and 1706 transitions. [2021-11-13 02:33:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:33:34,429 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 [2021-11-13 02:33:34,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:34,436 INFO L225 Difference]: With dead ends: 1066 [2021-11-13 02:33:34,436 INFO L226 Difference]: Without dead ends: 542 [2021-11-13 02:33:34,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:33:34,441 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 86 mSDsluCounter, 4915 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5760 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.96ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:34,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 5760 Invalid, 80 Unknown, 0 Unchecked, 16.46ms Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 154.96ms Time] [2021-11-13 02:33:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-13 02:33:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 533. [2021-11-13 02:33:34,482 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) [2021-11-13 02:33:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 848 transitions. [2021-11-13 02:33:34,490 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 848 transitions. Word has length 71 [2021-11-13 02:33:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:34,491 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 848 transitions. [2021-11-13 02:33:34,491 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) [2021-11-13 02:33:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 848 transitions. [2021-11-13 02:33:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:33:34,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:34,494 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] [2021-11-13 02:33:34,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:34,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:34,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:34,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1796600560, now seen corresponding path program 1 times [2021-11-13 02:33:34,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:34,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225227958] [2021-11-13 02:33:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:34,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:34,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:34,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:33:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:33:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:35,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:35,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:35,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225227958] [2021-11-13 02:33:35,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225227958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:35,976 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:35,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:33:35,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244801578] [2021-11-13 02:33:35,976 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:35,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:33:35,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:35,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:33:35,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:33:35,978 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) [2021-11-13 02:33:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:36,337 INFO L93 Difference]: Finished difference Result 1035 states and 1661 transitions. [2021-11-13 02:33:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:33:36,339 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 [2021-11-13 02:33:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:36,344 INFO L225 Difference]: With dead ends: 1035 [2021-11-13 02:33:36,344 INFO L226 Difference]: Without dead ends: 538 [2021-11-13 02:33:36,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:33:36,348 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 73 mSDsluCounter, 5612 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6417 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.78ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 233.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:36,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 6417 Invalid, 188 Unknown, 0 Unchecked, 26.78ms Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 233.01ms Time] [2021-11-13 02:33:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-13 02:33:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2021-11-13 02:33:36,368 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) [2021-11-13 02:33:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 849 transitions. [2021-11-13 02:33:36,375 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 849 transitions. Word has length 74 [2021-11-13 02:33:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:36,375 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 849 transitions. [2021-11-13 02:33:36,376 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) [2021-11-13 02:33:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 849 transitions. [2021-11-13 02:33:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 02:33:36,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:36,378 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] [2021-11-13 02:33:36,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:36,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:36,594 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:36,595 INFO L85 PathProgramCache]: Analyzing trace with hash -480673503, now seen corresponding path program 1 times [2021-11-13 02:33:36,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:36,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645281829] [2021-11-13 02:33:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:36,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:36,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:36,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:36,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:33:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:33:37,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:37,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:33:37,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:37,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645281829] [2021-11-13 02:33:37,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645281829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:37,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:37,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 02:33:37,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787553023] [2021-11-13 02:33:37,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:37,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:37,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:37,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:37,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:37,801 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) [2021-11-13 02:33:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:39,061 INFO L93 Difference]: Finished difference Result 2001 states and 3262 transitions. [2021-11-13 02:33:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:39,063 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 [2021-11-13 02:33:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:39,081 INFO L225 Difference]: With dead ends: 2001 [2021-11-13 02:33:39,081 INFO L226 Difference]: Without dead ends: 1509 [2021-11-13 02:33:39,085 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 [2021-11-13 02:33:39,086 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 1568 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 964.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.78ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1122.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:39,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 2994 Invalid, 260 Unknown, 0 Unchecked, 17.78ms Time], IncrementalHoareTripleChecker [7 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1122.07ms Time] [2021-11-13 02:33:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-11-13 02:33:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1383. [2021-11-13 02:33:39,187 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) [2021-11-13 02:33:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2247 transitions. [2021-11-13 02:33:39,205 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2247 transitions. Word has length 75 [2021-11-13 02:33:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:39,206 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 2247 transitions. [2021-11-13 02:33:39,206 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) [2021-11-13 02:33:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2247 transitions. [2021-11-13 02:33:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 02:33:39,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:39,213 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] [2021-11-13 02:33:39,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:39,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:39,435 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash 693390769, now seen corresponding path program 1 times [2021-11-13 02:33:39,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:39,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881722751] [2021-11-13 02:33:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:39,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:39,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:39,437 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:39,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:33:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:33:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:33:40,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:33:40,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:40,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881722751] [2021-11-13 02:33:40,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881722751] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:40,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:40,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:33:40,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808042970] [2021-11-13 02:33:40,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:40,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:33:40,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:33:40,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:33:40,772 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) [2021-11-13 02:33:42,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:44,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:45,989 INFO L93 Difference]: Finished difference Result 2735 states and 4554 transitions. [2021-11-13 02:33:45,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:33:45,992 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 [2021-11-13 02:33:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:46,015 INFO L225 Difference]: With dead ends: 2735 [2021-11-13 02:33:46,016 INFO L226 Difference]: Without dead ends: 1395 [2021-11-13 02:33:46,028 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 [2021-11-13 02:33:46,029 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 769 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4916.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.10ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5083.41ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:46,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2034 Invalid, 452 Unknown, 0 Unchecked, 12.10ms Time], IncrementalHoareTripleChecker [16 Valid, 434 Invalid, 2 Unknown, 0 Unchecked, 5083.41ms Time] [2021-11-13 02:33:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-11-13 02:33:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1395. [2021-11-13 02:33:46,120 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) [2021-11-13 02:33:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2259 transitions. [2021-11-13 02:33:46,131 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2259 transitions. Word has length 128 [2021-11-13 02:33:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:46,132 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 2259 transitions. [2021-11-13 02:33:46,132 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) [2021-11-13 02:33:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2259 transitions. [2021-11-13 02:33:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 02:33:46,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:46,138 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] [2021-11-13 02:33:46,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:46,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:46,358 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash -870219369, now seen corresponding path program 1 times [2021-11-13 02:33:46,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:46,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164353224] [2021-11-13 02:33:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:46,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:46,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:46,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:46,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:33:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:33:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:33:47,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:33:47,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:47,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164353224] [2021-11-13 02:33:47,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164353224] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:47,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:47,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:33:47,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150043300] [2021-11-13 02:33:47,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:47,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:33:47,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:47,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:33:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:33:47,799 INFO L87 Difference]: Start difference. First operand 1395 states and 2259 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) [2021-11-13 02:33:49,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:51,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:53,009 INFO L93 Difference]: Finished difference Result 2762 states and 4575 transitions. [2021-11-13 02:33:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:33:53,010 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 [2021-11-13 02:33:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:53,026 INFO L225 Difference]: With dead ends: 2762 [2021-11-13 02:33:53,026 INFO L226 Difference]: Without dead ends: 1410 [2021-11-13 02:33:53,039 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 [2021-11-13 02:33:53,040 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 770 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4897.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.43ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5075.88ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:53,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2035 Invalid, 454 Unknown, 0 Unchecked, 10.43ms Time], IncrementalHoareTripleChecker [14 Valid, 438 Invalid, 2 Unknown, 0 Unchecked, 5075.88ms Time] [2021-11-13 02:33:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-11-13 02:33:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1410. [2021-11-13 02:33:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1098 states have (on average 1.6147540983606556) internal successors, (1773), 1132 states have internal predecessors, (1773), 241 states have call successors, (241), 73 states have call predecessors, (241), 70 states have return successors, (260), 220 states have call predecessors, (260), 238 states have call successors, (260) [2021-11-13 02:33:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2274 transitions. [2021-11-13 02:33:53,126 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2274 transitions. Word has length 131 [2021-11-13 02:33:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:53,126 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 2274 transitions. [2021-11-13 02:33:53,127 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) [2021-11-13 02:33:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2274 transitions. [2021-11-13 02:33:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:33:53,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:53,133 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] [2021-11-13 02:33:53,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:53,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:33:53,358 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash -955446547, now seen corresponding path program 1 times [2021-11-13 02:33:53,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:53,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529428783] [2021-11-13 02:33:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:53,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:53,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:53,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:53,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:33:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:33:53,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:33:54,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:33:54,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:54,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529428783] [2021-11-13 02:33:54,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529428783] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:54,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:54,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:33:54,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622751710] [2021-11-13 02:33:54,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:54,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:33:54,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:54,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:33:54,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:33:54,812 INFO L87 Difference]: Start difference. First operand 1410 states and 2274 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) [2021-11-13 02:33:56,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:58,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:33:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:59,941 INFO L93 Difference]: Finished difference Result 2795 states and 4602 transitions. [2021-11-13 02:33:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:33:59,942 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 [2021-11-13 02:33:59,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:59,955 INFO L225 Difference]: With dead ends: 2795 [2021-11-13 02:33:59,955 INFO L226 Difference]: Without dead ends: 1428 [2021-11-13 02:33:59,967 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 [2021-11-13 02:33:59,967 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 767 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4871.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.98ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5018.57ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:59,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 2035 Invalid, 453 Unknown, 0 Unchecked, 7.98ms Time], IncrementalHoareTripleChecker [12 Valid, 439 Invalid, 2 Unknown, 0 Unchecked, 5018.57ms Time] [2021-11-13 02:33:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-13 02:34:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2021-11-13 02:34:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1113 states have (on average 1.6064690026954178) internal successors, (1788), 1147 states have internal predecessors, (1788), 241 states have call successors, (241), 76 states have call predecessors, (241), 73 states have return successors, (263), 220 states have call predecessors, (263), 238 states have call successors, (263) [2021-11-13 02:34:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2292 transitions. [2021-11-13 02:34:00,039 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2292 transitions. Word has length 134 [2021-11-13 02:34:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:00,041 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 2292 transitions. [2021-11-13 02:34:00,041 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) [2021-11-13 02:34:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2292 transitions. [2021-11-13 02:34:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 02:34:00,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:00,047 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] [2021-11-13 02:34:00,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:00,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:00,267 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash -459580597, now seen corresponding path program 1 times [2021-11-13 02:34:00,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:00,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940913988] [2021-11-13 02:34:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:00,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:00,268 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:00,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:34:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:00,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:34:00,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:34:01,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:34:01,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:01,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940913988] [2021-11-13 02:34:01,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940913988] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:01,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:34:01,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 02:34:01,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226166276] [2021-11-13 02:34:01,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:01,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:34:01,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:34:01,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:34:01,665 INFO L87 Difference]: Start difference. First operand 1428 states and 2292 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) [2021-11-13 02:34:03,684 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:05,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:06,713 INFO L93 Difference]: Finished difference Result 2834 states and 4635 transitions. [2021-11-13 02:34:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:34:06,714 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 [2021-11-13 02:34:06,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:06,732 INFO L225 Difference]: With dead ends: 2834 [2021-11-13 02:34:06,733 INFO L226 Difference]: Without dead ends: 1449 [2021-11-13 02:34:06,741 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 [2021-11-13 02:34:06,742 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 770 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4817.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.72ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4942.60ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:06,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2035 Invalid, 452 Unknown, 0 Unchecked, 6.72ms Time], IncrementalHoareTripleChecker [10 Valid, 440 Invalid, 2 Unknown, 0 Unchecked, 4942.60ms Time] [2021-11-13 02:34:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-11-13 02:34:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1449. [2021-11-13 02:34:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1131 states have (on average 1.596816976127321) internal successors, (1806), 1165 states have internal predecessors, (1806), 241 states have call successors, (241), 79 states have call predecessors, (241), 76 states have return successors, (266), 220 states have call predecessors, (266), 238 states have call successors, (266) [2021-11-13 02:34:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2313 transitions. [2021-11-13 02:34:06,818 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2313 transitions. Word has length 137 [2021-11-13 02:34:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:06,818 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 2313 transitions. [2021-11-13 02:34:06,819 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) [2021-11-13 02:34:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2313 transitions. [2021-11-13 02:34:06,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 02:34:06,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:06,825 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] [2021-11-13 02:34:06,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:07,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:07,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash -904162662, now seen corresponding path program 1 times [2021-11-13 02:34:07,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:07,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817039041] [2021-11-13 02:34:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:07,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:07,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:07,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:07,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:34:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:34:07,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:34:07,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:34:08,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:08,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817039041] [2021-11-13 02:34:08,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817039041] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:08,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:34:08,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-13 02:34:08,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429202644] [2021-11-13 02:34:08,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:08,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:34:08,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:34:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:34:08,215 INFO L87 Difference]: Start difference. First operand 1449 states and 2313 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-11-13 02:34:10,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:11,013 INFO L93 Difference]: Finished difference Result 3105 states and 4901 transitions. [2021-11-13 02:34:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:34:11,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 4 states have internal predecessors, (84), 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 139 [2021-11-13 02:34:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:11,029 INFO L225 Difference]: With dead ends: 3105 [2021-11-13 02:34:11,029 INFO L226 Difference]: Without dead ends: 1699 [2021-11-13 02:34:11,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:34:11,038 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 599 mSDsluCounter, 2982 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2567.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 3894 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.29ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2670.57ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:11,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 3894 Invalid, 206 Unknown, 0 Unchecked, 11.29ms Time], IncrementalHoareTripleChecker [18 Valid, 187 Invalid, 1 Unknown, 0 Unchecked, 2670.57ms Time] [2021-11-13 02:34:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-11-13 02:34:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1693. [2021-11-13 02:34:11,148 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) [2021-11-13 02:34:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2605 transitions. [2021-11-13 02:34:11,158 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2605 transitions. Word has length 139 [2021-11-13 02:34:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:11,159 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 2605 transitions. [2021-11-13 02:34:11,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-11-13 02:34:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2605 transitions. [2021-11-13 02:34:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 02:34:11,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:11,165 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] [2021-11-13 02:34:11,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:11,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:11,385 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash -222877143, now seen corresponding path program 1 times [2021-11-13 02:34:11,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:11,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198589434] [2021-11-13 02:34:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:11,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:11,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:11,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:34:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:34:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:12,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:34:13,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:13,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198589434] [2021-11-13 02:34:13,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198589434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:13,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737264679] [2021-11-13 02:34:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:13,251 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:13,255 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:13,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:34:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:13,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:13,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 02:34:13,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:34:14,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1737264679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:14,084 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:14,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-13 02:34:14,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118609507] [2021-11-13 02:34:14,085 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:14,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:14,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:34:14,086 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) [2021-11-13 02:34:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:14,246 INFO L93 Difference]: Finished difference Result 4977 states and 7785 transitions. [2021-11-13 02:34:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:14,247 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 [2021-11-13 02:34:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:14,273 INFO L225 Difference]: With dead ends: 4977 [2021-11-13 02:34:14,274 INFO L226 Difference]: Without dead ends: 3330 [2021-11-13 02:34:14,285 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 [2021-11-13 02:34:14,285 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 829 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.68ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.74ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:14,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 1806 Invalid, 8 Unknown, 0 Unchecked, 4.68ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 44.74ms Time] [2021-11-13 02:34:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-11-13 02:34:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3318. [2021-11-13 02:34:14,471 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) [2021-11-13 02:34:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 5161 transitions. [2021-11-13 02:34:14,492 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 5161 transitions. Word has length 140 [2021-11-13 02:34:14,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:14,492 INFO L470 AbstractCegarLoop]: Abstraction has 3318 states and 5161 transitions. [2021-11-13 02:34:14,493 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) [2021-11-13 02:34:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 5161 transitions. [2021-11-13 02:34:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 02:34:14,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:14,498 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] [2021-11-13 02:34:14,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:14,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-13 02:34:14,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:14,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash 171489643, now seen corresponding path program 1 times [2021-11-13 02:34:14,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:14,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859584650] [2021-11-13 02:34:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:14,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:14,913 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:14,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:34:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:15,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:34:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:34:16,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:16,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859584650] [2021-11-13 02:34:16,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859584650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:16,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652185515] [2021-11-13 02:34:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:16,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:16,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:16,706 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:16,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 02:34:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:17,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:34:17,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:17,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:34:18,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652185515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:18,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537412091] [2021-11-13 02:34:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:18,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:18,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:18,181 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:18,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 02:34:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:34:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:18,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:34:19,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537412091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:19,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:34:19,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-13 02:34:19,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840010645] [2021-11-13 02:34:19,478 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:19,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 02:34:19,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 02:34:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:34:19,480 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) [2021-11-13 02:34:21,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:23,507 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:25,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:27,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:29,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:31,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:42,711 INFO L93 Difference]: Finished difference Result 11235 states and 18161 transitions. [2021-11-13 02:34:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:34:42,713 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 [2021-11-13 02:34:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:42,789 INFO L225 Difference]: With dead ends: 11235 [2021-11-13 02:34:42,790 INFO L226 Difference]: Without dead ends: 7960 [2021-11-13 02:34:42,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-13 02:34:42,813 INFO L933 BasicCegarLoop]: 1647 mSDtfsCounter, 4197 mSDsluCounter, 4410 mSDsCounter, 0 mSdLazyCounter, 8591 mSolverCounterSat, 1702 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21035.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4277 SdHoareTripleChecker+Valid, 6057 SdHoareTripleChecker+Invalid, 10299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 73.76ms SdHoareTripleChecker+Time, 1702 IncrementalHoareTripleChecker+Valid, 8591 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22513.74ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:42,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4277 Valid, 6057 Invalid, 10299 Unknown, 0 Unchecked, 73.76ms Time], IncrementalHoareTripleChecker [1702 Valid, 8591 Invalid, 6 Unknown, 0 Unchecked, 22513.74ms Time] [2021-11-13 02:34:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-11-13 02:34:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7024. [2021-11-13 02:34:43,549 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) [2021-11-13 02:34:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7024 states to 7024 states and 11021 transitions. [2021-11-13 02:34:43,666 INFO L78 Accepts]: Start accepts. Automaton has 7024 states and 11021 transitions. Word has length 140 [2021-11-13 02:34:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:43,667 INFO L470 AbstractCegarLoop]: Abstraction has 7024 states and 11021 transitions. [2021-11-13 02:34:43,677 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) [2021-11-13 02:34:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7024 states and 11021 transitions. [2021-11-13 02:34:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:43,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:43,697 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] [2021-11-13 02:34:43,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:43,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-13 02:34:44,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 02:34:44,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:44,306 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:44,306 INFO L85 PathProgramCache]: Analyzing trace with hash -535275790, now seen corresponding path program 1 times [2021-11-13 02:34:44,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:44,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534618113] [2021-11-13 02:34:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:44,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:44,309 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:44,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:34:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:44,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:34:44,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:34:45,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:34:45,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:45,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534618113] [2021-11-13 02:34:45,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534618113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:45,635 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:45,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-13 02:34:45,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857461456] [2021-11-13 02:34:45,635 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:45,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:34:45,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:45,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:34:45,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:34:45,638 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) [2021-11-13 02:34:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:46,354 INFO L93 Difference]: Finished difference Result 13712 states and 21556 transitions. [2021-11-13 02:34:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:34:46,354 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 [2021-11-13 02:34:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:46,417 INFO L225 Difference]: With dead ends: 13712 [2021-11-13 02:34:46,418 INFO L226 Difference]: Without dead ends: 6721 [2021-11-13 02:34:46,456 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 [2021-11-13 02:34:46,457 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 66 mSDsluCounter, 5585 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 6390 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.77ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 212.74ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:46,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 6390 Invalid, 153 Unknown, 0 Unchecked, 9.77ms Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 212.74ms Time] [2021-11-13 02:34:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-13 02:34:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6691. [2021-11-13 02:34:46,888 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) [2021-11-13 02:34:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6691 states to 6691 states and 10510 transitions. [2021-11-13 02:34:46,945 INFO L78 Accepts]: Start accepts. Automaton has 6691 states and 10510 transitions. Word has length 143 [2021-11-13 02:34:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:46,945 INFO L470 AbstractCegarLoop]: Abstraction has 6691 states and 10510 transitions. [2021-11-13 02:34:46,946 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) [2021-11-13 02:34:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 6691 states and 10510 transitions. [2021-11-13 02:34:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:34:46,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:46,953 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] [2021-11-13 02:34:46,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:47,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:34:47,175 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1545312976, now seen corresponding path program 1 times [2021-11-13 02:34:47,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:34:47,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693793222] [2021-11-13 02:34:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:47,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:34:47,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:34:47,177 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:34:47,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:34:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:47,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:34:47,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:34:48,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 02:34:48,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:34:48,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693793222] [2021-11-13 02:34:48,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693793222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:48,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [40636128] [2021-11-13 02:34:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:48,811 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:34:48,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:34:48,814 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:34:48,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 02:34:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:49,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:34:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:34:49,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 02:34:50,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [40636128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:50,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941307671] [2021-11-13 02:34:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:50,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:50,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:50,258 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:50,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 02:34:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:50,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:34:50,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:34:50,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 02:34:51,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941307671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:51,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:34:51,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-13 02:34:51,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827135475] [2021-11-13 02:34:51,626 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:51,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:34:51,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:51,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:34:51,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:34:51,628 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) [2021-11-13 02:34:53,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:55,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:57,665 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:59,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:01,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:03,683 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:11,464 INFO L93 Difference]: Finished difference Result 17082 states and 27484 transitions. [2021-11-13 02:35:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:35:11,470 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 [2021-11-13 02:35:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:11,542 INFO L225 Difference]: With dead ends: 17082 [2021-11-13 02:35:11,542 INFO L226 Difference]: Without dead ends: 10431 [2021-11-13 02:35:11,588 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 [2021-11-13 02:35:11,589 INFO L933 BasicCegarLoop]: 1513 mSDtfsCounter, 2601 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 6168 mSolverCounterSat, 856 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18181.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2672 SdHoareTripleChecker+Valid, 4625 SdHoareTripleChecker+Invalid, 7030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.38ms SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 6168 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19120.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:11,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2672 Valid, 4625 Invalid, 7030 Unknown, 0 Unchecked, 46.38ms Time], IncrementalHoareTripleChecker [856 Valid, 6168 Invalid, 6 Unknown, 0 Unchecked, 19120.07ms Time] [2021-11-13 02:35:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-11-13 02:35:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 10045. [2021-11-13 02:35:12,217 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) [2021-11-13 02:35:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 15814 transitions. [2021-11-13 02:35:12,301 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 15814 transitions. Word has length 146 [2021-11-13 02:35:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:12,301 INFO L470 AbstractCegarLoop]: Abstraction has 10045 states and 15814 transitions. [2021-11-13 02:35:12,302 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) [2021-11-13 02:35:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 15814 transitions. [2021-11-13 02:35:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:35:12,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:12,308 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] [2021-11-13 02:35:12,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:12,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:12,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:12,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:12,921 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:12,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:12,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1681512240, now seen corresponding path program 1 times [2021-11-13 02:35:12,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:12,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608121187] [2021-11-13 02:35:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:12,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:12,923 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:12,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:35:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:35:13,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:35:13,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:35:14,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:14,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608121187] [2021-11-13 02:35:14,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608121187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:14,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [301061124] [2021-11-13 02:35:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:14,186 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:35:14,197 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:35:14,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 02:35:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:14,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:35:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:35:14,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:35:15,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [301061124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:15,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77634374] [2021-11-13 02:35:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:15,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:15,256 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:15,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 02:35:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:15,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:35:15,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:35:15,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:35:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77634374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:16,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:35:16,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-13 02:35:16,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875270566] [2021-11-13 02:35:16,269 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:35:16,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:35:16,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:16,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:35:16,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:35:16,270 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) [2021-11-13 02:35:18,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:20,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:22,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:32,412 INFO L93 Difference]: Finished difference Result 37277 states and 61115 transitions. [2021-11-13 02:35:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:35:32,414 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 [2021-11-13 02:35:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:32,721 INFO L225 Difference]: With dead ends: 37277 [2021-11-13 02:35:32,721 INFO L226 Difference]: Without dead ends: 27248 [2021-11-13 02:35:32,801 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 [2021-11-13 02:35:32,802 INFO L933 BasicCegarLoop]: 1336 mSDtfsCounter, 4647 mSDsluCounter, 2322 mSDsCounter, 0 mSdLazyCounter, 6594 mSolverCounterSat, 1446 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13470.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4746 SdHoareTripleChecker+Valid, 3658 SdHoareTripleChecker+Invalid, 8043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.77ms SdHoareTripleChecker+Time, 1446 IncrementalHoareTripleChecker+Valid, 6594 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14553.64ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:32,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4746 Valid, 3658 Invalid, 8043 Unknown, 0 Unchecked, 53.77ms Time], IncrementalHoareTripleChecker [1446 Valid, 6594 Invalid, 3 Unknown, 0 Unchecked, 14553.64ms Time] [2021-11-13 02:35:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27248 states. [2021-11-13 02:35:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27248 to 24098. [2021-11-13 02:35:34,486 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) [2021-11-13 02:35:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24098 states to 24098 states and 38055 transitions. [2021-11-13 02:35:34,732 INFO L78 Accepts]: Start accepts. Automaton has 24098 states and 38055 transitions. Word has length 147 [2021-11-13 02:35:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:34,732 INFO L470 AbstractCegarLoop]: Abstraction has 24098 states and 38055 transitions. [2021-11-13 02:35:34,733 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) [2021-11-13 02:35:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24098 states and 38055 transitions. [2021-11-13 02:35:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-13 02:35:34,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:34,741 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] [2021-11-13 02:35:34,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:34,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-13 02:35:35,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:35,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:35,345 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2057114528, now seen corresponding path program 1 times [2021-11-13 02:35:35,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:35,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677051632] [2021-11-13 02:35:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:35,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:35,347 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:35,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:35:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:35:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:35:36,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 02:35:36,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:35:36,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677051632] [2021-11-13 02:35:36,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677051632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:36,598 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:35:36,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-13 02:35:36,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715257791] [2021-11-13 02:35:36,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:36,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:35:36,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:35:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:35:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:35:36,599 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) [2021-11-13 02:35:38,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:40,624 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:42,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:44,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:54,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:54,725 INFO L93 Difference]: Finished difference Result 71886 states and 120766 transitions. [2021-11-13 02:35:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:35:54,726 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 [2021-11-13 02:35:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:55,476 INFO L225 Difference]: With dead ends: 71886 [2021-11-13 02:35:55,477 INFO L226 Difference]: Without dead ends: 47720 [2021-11-13 02:35:55,748 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 [2021-11-13 02:35:55,749 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 3851 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 6314 mSolverCounterSat, 1135 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14416.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3958 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 7453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.32ms SdHoareTripleChecker+Time, 1135 IncrementalHoareTripleChecker+Valid, 6314 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15377.24ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:55,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3958 Valid, 3447 Invalid, 7453 Unknown, 0 Unchecked, 42.32ms Time], IncrementalHoareTripleChecker [1135 Valid, 6314 Invalid, 4 Unknown, 0 Unchecked, 15377.24ms Time] [2021-11-13 02:35:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47720 states. [2021-11-13 02:35:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47720 to 41342. [2021-11-13 02:35:58,651 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) [2021-11-13 02:35:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41342 states to 41342 states and 66163 transitions. [2021-11-13 02:35:59,206 INFO L78 Accepts]: Start accepts. Automaton has 41342 states and 66163 transitions. Word has length 149 [2021-11-13 02:35:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:59,207 INFO L470 AbstractCegarLoop]: Abstraction has 41342 states and 66163 transitions. [2021-11-13 02:35:59,207 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) [2021-11-13 02:35:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 41342 states and 66163 transitions. [2021-11-13 02:35:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-13 02:35:59,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:59,214 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] [2021-11-13 02:35:59,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:59,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:35:59,434 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:59,434 INFO L85 PathProgramCache]: Analyzing trace with hash 128819519, now seen corresponding path program 1 times [2021-11-13 02:35:59,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:35:59,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735204418] [2021-11-13 02:35:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:59,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:35:59,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:35:59,437 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:35:59,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 02:35:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:00,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:36:00,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:36:00,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 02:36:00,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:00,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735204418] [2021-11-13 02:36:00,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735204418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:00,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:00,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-13 02:36:00,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565347692] [2021-11-13 02:36:00,900 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:00,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:36:00,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:00,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:36:00,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:36:00,902 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) [2021-11-13 02:36:02,921 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:04,929 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:06,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:08,940 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:20,045 INFO L93 Difference]: Finished difference Result 85789 states and 139531 transitions. [2021-11-13 02:36:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 02:36:20,045 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 [2021-11-13 02:36:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:20,583 INFO L225 Difference]: With dead ends: 85789 [2021-11-13 02:36:20,583 INFO L226 Difference]: Without dead ends: 50025 [2021-11-13 02:36:20,816 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 [2021-11-13 02:36:20,816 INFO L933 BasicCegarLoop]: 1098 mSDtfsCounter, 3116 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 5473 mSolverCounterSat, 721 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14495.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3204 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 6198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.77ms SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 5473 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15419.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:20,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3204 Valid, 3604 Invalid, 6198 Unknown, 0 Unchecked, 40.77ms Time], IncrementalHoareTripleChecker [721 Valid, 5473 Invalid, 4 Unknown, 0 Unchecked, 15419.65ms Time] [2021-11-13 02:36:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50025 states. [2021-11-13 02:36:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50025 to 44663. [2021-11-13 02:36:23,896 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) [2021-11-13 02:36:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44663 states to 44663 states and 71329 transitions. [2021-11-13 02:36:24,408 INFO L78 Accepts]: Start accepts. Automaton has 44663 states and 71329 transitions. Word has length 149 [2021-11-13 02:36:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:24,409 INFO L470 AbstractCegarLoop]: Abstraction has 44663 states and 71329 transitions. [2021-11-13 02:36:24,409 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) [2021-11-13 02:36:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 44663 states and 71329 transitions. [2021-11-13 02:36:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 02:36:24,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:24,416 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] [2021-11-13 02:36:24,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:24,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:24,638 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1927228095, now seen corresponding path program 1 times [2021-11-13 02:36:24,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:24,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515208802] [2021-11-13 02:36:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:24,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:24,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:24,641 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:24,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 02:36:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:25,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:36:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:36:25,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:36:26,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:26,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515208802] [2021-11-13 02:36:26,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515208802] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:36:26,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:36:26,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 18 [2021-11-13 02:36:26,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563974093] [2021-11-13 02:36:26,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:26,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:36:26,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:26,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:36:26,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:36:26,773 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) [2021-11-13 02:36:28,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:30,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:32,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:34,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:36,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:38,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:40,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:42,839 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:54,334 INFO L93 Difference]: Finished difference Result 84796 states and 137338 transitions. [2021-11-13 02:36:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:36:54,334 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 [2021-11-13 02:36:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:54,599 INFO L225 Difference]: With dead ends: 84796 [2021-11-13 02:36:54,599 INFO L226 Difference]: Without dead ends: 45711 [2021-11-13 02:36:54,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-11-13 02:36:54,974 INFO L933 BasicCegarLoop]: 1401 mSDtfsCounter, 2071 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 7486 mSolverCounterSat, 528 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23005.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 4810 SdHoareTripleChecker+Invalid, 8022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.42ms SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 7486 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24062.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:54,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 4810 Invalid, 8022 Unknown, 0 Unchecked, 47.42ms Time], IncrementalHoareTripleChecker [528 Valid, 7486 Invalid, 8 Unknown, 0 Unchecked, 24062.02ms Time] [2021-11-13 02:36:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45711 states. [2021-11-13 02:36:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45711 to 44588. [2021-11-13 02:36:57,468 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) [2021-11-13 02:36:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44588 states to 44588 states and 71188 transitions. [2021-11-13 02:36:57,979 INFO L78 Accepts]: Start accepts. Automaton has 44588 states and 71188 transitions. Word has length 151 [2021-11-13 02:36:57,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:57,980 INFO L470 AbstractCegarLoop]: Abstraction has 44588 states and 71188 transitions. [2021-11-13 02:36:57,980 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) [2021-11-13 02:36:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 44588 states and 71188 transitions. [2021-11-13 02:36:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-13 02:36:57,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:57,986 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] [2021-11-13 02:36:58,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:58,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:58,202 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1166452067, now seen corresponding path program 1 times [2021-11-13 02:36:58,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:58,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956474151] [2021-11-13 02:36:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:58,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:58,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:58,204 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:58,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 02:36:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:58,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:36:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:36:59,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 02:37:00,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:00,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956474151] [2021-11-13 02:37:00,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956474151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:00,181 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:00,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-13 02:37:00,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282762762] [2021-11-13 02:37:00,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:00,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:37:00,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:00,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:37:00,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:37:00,183 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) [2021-11-13 02:37:02,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:04,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:06,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:08,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:10,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:27,952 INFO L93 Difference]: Finished difference Result 125683 states and 207609 transitions. [2021-11-13 02:37:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 02:37:27,953 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 [2021-11-13 02:37:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:28,559 INFO L225 Difference]: With dead ends: 125683 [2021-11-13 02:37:28,559 INFO L226 Difference]: Without dead ends: 86163 [2021-11-13 02:37:29,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-13 02:37:29,086 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 3887 mSDsluCounter, 2768 mSDsCounter, 0 mSdLazyCounter, 7853 mSolverCounterSat, 1116 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19651.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3982 SdHoareTripleChecker+Valid, 3801 SdHoareTripleChecker+Invalid, 8974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.90ms SdHoareTripleChecker+Time, 1116 IncrementalHoareTripleChecker+Valid, 7853 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21056.47ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:29,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3982 Valid, 3801 Invalid, 8974 Unknown, 0 Unchecked, 59.90ms Time], IncrementalHoareTripleChecker [1116 Valid, 7853 Invalid, 5 Unknown, 0 Unchecked, 21056.47ms Time] [2021-11-13 02:37:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86163 states. [2021-11-13 02:37:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86163 to 77969. [2021-11-13 02:37:34,697 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) [2021-11-13 02:37:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77969 states to 77969 states and 124215 transitions. [2021-11-13 02:37:35,720 INFO L78 Accepts]: Start accepts. Automaton has 77969 states and 124215 transitions. Word has length 154 [2021-11-13 02:37:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:35,720 INFO L470 AbstractCegarLoop]: Abstraction has 77969 states and 124215 transitions. [2021-11-13 02:37:35,721 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) [2021-11-13 02:37:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 77969 states and 124215 transitions. [2021-11-13 02:37:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 02:37:35,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:35,729 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] [2021-11-13 02:37:35,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:35,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:35,951 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash -598786686, now seen corresponding path program 1 times [2021-11-13 02:37:35,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:35,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495648668] [2021-11-13 02:37:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:35,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:35,954 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:35,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b646189c-83f2-4d87-bfe9-8054a0260adc/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 02:37:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:36,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:37:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:37:36,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 02:37:37,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:37,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495648668] [2021-11-13 02:37:37,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495648668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:37,117 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:37,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:37:37,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938945806] [2021-11-13 02:37:37,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:37,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:37:37,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:37:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:37:37,119 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)