./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.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_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/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_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/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_07de2b1b-e0f6-4075-b433-05a83949e709/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 a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:59,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:59,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:59,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:59,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:59,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:59,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:59,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:59,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:59,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:59,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:59,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:59,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:59,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:59,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:59,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:59,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:59,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:59,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:59,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:59,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:59,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:59,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:59,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:59,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:59,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:59,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:59,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:59,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:59,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:59,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:59,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:59,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:59,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:59,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:59,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:59,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:59,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:59,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:59,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:59,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:59,838 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:31:59,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:59,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:59,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:59,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:59,900 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:59,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:59,901 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:59,901 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:31:59,901 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:59,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:59,902 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:31:59,902 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:31:59,902 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:59,903 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:31:59,903 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:31:59,903 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:31:59,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:59,905 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:59,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:31:59,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:59,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:59,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:59,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:59,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:59,907 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:59,907 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:59,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:59,908 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:59,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:59,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:59,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:59,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:59,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:59,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:59,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:59,910 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:31:59,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:31:59,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:59,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:59,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:59,912 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_07de2b1b-e0f6-4075-b433-05a83949e709/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2021-11-13 01:32:00,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:32:00,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:32:00,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:32:00,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:32:00,239 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:32:00,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-13 01:32:00,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data/2a03a5009/fdea75bb9a274eb18f311438980865a7/FLAGf42e36423 [2021-11-13 01:32:01,237 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:32:01,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-13 01:32:01,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data/2a03a5009/fdea75bb9a274eb18f311438980865a7/FLAGf42e36423 [2021-11-13 01:32:01,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data/2a03a5009/fdea75bb9a274eb18f311438980865a7 [2021-11-13 01:32:01,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:32:01,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:32:01,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:32:01,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:32:01,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:32:01,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:32:01" (1/1) ... [2021-11-13 01:32:01,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8e8321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:01, skipping insertion in model container [2021-11-13 01:32:01,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:32:01" (1/1) ... [2021-11-13 01:32:01,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:32:01,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:32:02,226 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_07de2b1b-e0f6-4075-b433-05a83949e709/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-13 01:32:02,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:32:02,744 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 01:32:02,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f0c6cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:02, skipping insertion in model container [2021-11-13 01:32:02,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:32:02,746 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:32:02,749 INFO L158 Benchmark]: Toolchain (without parser) took 947.38ms. Allocated memory is still 134.2MB. Free memory was 99.8MB in the beginning and 96.9MB in the end (delta: 2.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 01:32:02,751 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 46.6MB in the beginning and 46.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:32:02,753 INFO L158 Benchmark]: CACSL2BoogieTranslator took 943.41ms. Allocated memory is still 134.2MB. Free memory was 99.8MB in the beginning and 96.9MB in the end (delta: 2.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 01:32:02,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 92.3MB. Free memory was 46.6MB in the beginning and 46.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 943.41ms. Allocated memory is still 134.2MB. Free memory was 99.8MB in the beginning and 96.9MB in the end (delta: 2.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/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_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/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_07de2b1b-e0f6-4075-b433-05a83949e709/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 a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:32:05,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:32:05,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:32:05,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:32:05,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:32:05,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:32:05,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:32:05,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:32:05,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:32:05,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:32:05,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:32:05,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:32:05,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:32:05,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:32:05,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:32:05,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:32:05,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:32:05,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:32:05,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:32:05,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:32:05,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:32:05,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:32:05,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:32:05,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:32:05,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:32:05,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:32:05,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:32:05,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:32:05,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:32:05,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:32:05,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:32:05,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:32:05,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:32:05,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:32:05,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:32:05,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:32:05,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:32:05,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:32:05,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:32:05,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:32:05,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:32:05,839 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:32:05,904 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:32:05,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:32:05,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:32:05,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:32:05,906 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:32:05,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:32:05,907 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:32:05,907 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:32:05,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:32:05,908 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:32:05,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:32:05,911 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:32:05,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:32:05,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:32:05,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:32:05,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:32:05,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:32:05,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:32:05,913 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:32:05,914 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:32:05,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:32:05,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:32:05,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:32:05,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:32:05,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:32:05,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:32:05,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:32:05,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:32:05,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:32:05,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:32:05,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:32:05,918 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:32:05,918 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:05,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:32:05,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:32:05,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:32:05,919 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_07de2b1b-e0f6-4075-b433-05a83949e709/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2021-11-13 01:32:06,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:32:06,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:32:06,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:32:06,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:32:06,446 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:32:06,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-13 01:32:06,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data/c4c1a2a6c/88ead05416e744da9f4df47acdc1d1dd/FLAGed1340641 [2021-11-13 01:32:07,545 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:32:07,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2021-11-13 01:32:07,585 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data/c4c1a2a6c/88ead05416e744da9f4df47acdc1d1dd/FLAGed1340641 [2021-11-13 01:32:07,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/data/c4c1a2a6c/88ead05416e744da9f4df47acdc1d1dd [2021-11-13 01:32:07,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:32:07,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:32:07,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:32:07,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:32:07,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:32:07,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:32:07" (1/1) ... [2021-11-13 01:32:07,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416f8096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:07, skipping insertion in model container [2021-11-13 01:32:07,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:32:07" (1/1) ... [2021-11-13 01:32:07,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:32:07,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:32:08,180 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_07de2b1b-e0f6-4075-b433-05a83949e709/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-13 01:32:08,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:32:08,744 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:32:08,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:32:08,799 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_07de2b1b-e0f6-4075-b433-05a83949e709/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-13 01:32:09,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:32:09,039 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:32:09,071 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_07de2b1b-e0f6-4075-b433-05a83949e709/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2021-11-13 01:32:09,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:32:09,251 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:32:09,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09 WrapperNode [2021-11-13 01:32:09,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:32:09,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:32:09,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:32:09,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:32:09,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:32:09,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:32:09,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:32:09,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:32:09,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:32:09,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:32:09,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:32:09,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:32:09,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (1/1) ... [2021-11-13 01:32:09,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:32:09,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:32:09,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:32:09,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:32:09,750 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-13 01:32:09,751 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-13 01:32:09,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:32:09,751 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 01:32:09,751 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 01:32:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-13 01:32:09,752 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-13 01:32:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 01:32:09,752 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 01:32:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-13 01:32:09,753 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-13 01:32:09,753 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 01:32:09,753 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 01:32:09,753 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 01:32:09,753 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 01:32:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 01:32:09,754 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 01:32:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 01:32:09,754 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 01:32:09,755 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 01:32:09,755 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 01:32:09,755 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 01:32:09,755 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 01:32:09,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:32:09,756 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-13 01:32:09,756 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-13 01:32:09,756 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 01:32:09,756 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 01:32:09,757 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-13 01:32:09,757 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-13 01:32:09,757 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 01:32:09,757 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 01:32:09,758 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 01:32:09,758 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 01:32:09,758 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 01:32:09,758 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 01:32:09,758 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 01:32:09,759 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 01:32:09,759 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 01:32:09,759 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 01:32:09,759 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 01:32:09,760 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 01:32:09,760 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 01:32:09,760 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 01:32:09,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:32:09,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:32:09,761 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 01:32:09,761 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 01:32:14,334 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:32:14,335 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 01:32:14,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:32:14 BoogieIcfgContainer [2021-11-13 01:32:14,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:32:14,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:32:14,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:32:14,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:32:14,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:32:07" (1/3) ... [2021-11-13 01:32:14,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e413e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:32:14, skipping insertion in model container [2021-11-13 01:32:14,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:32:09" (2/3) ... [2021-11-13 01:32:14,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e413e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:32:14, skipping insertion in model container [2021-11-13 01:32:14,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:32:14" (3/3) ... [2021-11-13 01:32:14,350 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2021-11-13 01:32:14,357 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:32:14,357 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:32:14,427 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:32:14,436 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 01:32:14,437 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:32:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 526 states, 411 states have (on average 1.683698296836983) internal successors, (692), 427 states have internal predecessors, (692), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-13 01:32:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 01:32:14,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:14,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:14,516 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash -63846354, now seen corresponding path program 1 times [2021-11-13 01:32:14,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:14,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6641122] [2021-11-13 01:32:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:14,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:14,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:14,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:14,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:32:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:15,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:32:15,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:15,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:16,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:16,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6641122] [2021-11-13 01:32:16,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6641122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:16,094 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:16,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:32:16,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645286950] [2021-11-13 01:32:16,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:16,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:32:16,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:32:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:32:16,146 INFO L87 Difference]: Start difference. First operand has 526 states, 411 states have (on average 1.683698296836983) internal successors, (692), 427 states have internal predecessors, (692), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 01:32:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:16,396 INFO L93 Difference]: Finished difference Result 1047 states and 1750 transitions. [2021-11-13 01:32:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 101 [2021-11-13 01:32:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:16,423 INFO L225 Difference]: With dead ends: 1047 [2021-11-13 01:32:16,424 INFO L226 Difference]: Without dead ends: 521 [2021-11-13 01:32:16,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 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 01:32:16,447 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 31 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.10ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.18ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:16,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1710 Invalid, 47 Unknown, 0 Unchecked, 20.10ms Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 64.18ms Time] [2021-11-13 01:32:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-13 01:32:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 521. [2021-11-13 01:32:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.660933660933661) internal successors, (676), 422 states have internal predecessors, (676), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-13 01:32:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 857 transitions. [2021-11-13 01:32:16,583 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 857 transitions. Word has length 101 [2021-11-13 01:32:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:16,584 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 857 transitions. [2021-11-13 01:32:16,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-13 01:32:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 857 transitions. [2021-11-13 01:32:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 01:32:16,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:16,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:16,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:16,811 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash -165243139, now seen corresponding path program 1 times [2021-11-13 01:32:16,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:16,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696080657] [2021-11-13 01:32:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:16,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:16,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:16,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:16,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:32:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:17,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:32:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:17,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:18,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:18,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696080657] [2021-11-13 01:32:18,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696080657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:18,468 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:18,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 01:32:18,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687101593] [2021-11-13 01:32:18,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:18,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:32:18,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:18,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:32:18,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:32:18,473 INFO L87 Difference]: Start difference. First operand 521 states and 857 transitions. Second operand has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 01:32:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:18,815 INFO L93 Difference]: Finished difference Result 1030 states and 1706 transitions. [2021-11-13 01:32:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:32:18,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 106 [2021-11-13 01:32:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:18,826 INFO L225 Difference]: With dead ends: 1030 [2021-11-13 01:32:18,826 INFO L226 Difference]: Without dead ends: 530 [2021-11-13 01:32:18,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:32:18,834 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 118 mSDsluCounter, 5715 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6556 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.26ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:18,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 6556 Invalid, 98 Unknown, 0 Unchecked, 25.25ms Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 214.26ms Time] [2021-11-13 01:32:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-13 01:32:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 530. [2021-11-13 01:32:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 415 states have (on average 1.6602409638554216) internal successors, (689), 431 states have internal predecessors, (689), 91 states have call successors, (91), 23 states have call predecessors, (91), 23 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2021-11-13 01:32:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 871 transitions. [2021-11-13 01:32:18,896 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 871 transitions. Word has length 106 [2021-11-13 01:32:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:18,897 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 871 transitions. [2021-11-13 01:32:18,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 01:32:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 871 transitions. [2021-11-13 01:32:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 01:32:18,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:18,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:18,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:19,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:19,119 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1036237632, now seen corresponding path program 1 times [2021-11-13 01:32:19,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:19,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963335341] [2021-11-13 01:32:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:19,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:19,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:19,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:19,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:32:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:32:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:20,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:20,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:20,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963335341] [2021-11-13 01:32:20,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963335341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:20,499 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:20,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:32:20,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646742184] [2021-11-13 01:32:20,500 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:20,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:32:20,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:20,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:32:20,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:32:20,502 INFO L87 Difference]: Start difference. First operand 530 states and 871 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 01:32:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:20,921 INFO L93 Difference]: Finished difference Result 1086 states and 1797 transitions. [2021-11-13 01:32:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:20,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 107 [2021-11-13 01:32:20,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:20,933 INFO L225 Difference]: With dead ends: 1086 [2021-11-13 01:32:20,933 INFO L226 Difference]: Without dead ends: 544 [2021-11-13 01:32:20,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 208 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 01:32:20,943 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 136 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 255.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.55ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 296.09ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:20,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 3146 Invalid, 200 Unknown, 0 Unchecked, 13.55ms Time], IncrementalHoareTripleChecker [35 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 296.09ms Time] [2021-11-13 01:32:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-13 01:32:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 535. [2021-11-13 01:32:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 420 states have (on average 1.6) internal successors, (672), 435 states have internal predecessors, (672), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-13 01:32:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 853 transitions. [2021-11-13 01:32:21,025 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 853 transitions. Word has length 107 [2021-11-13 01:32:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:21,026 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 853 transitions. [2021-11-13 01:32:21,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 01:32:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 853 transitions. [2021-11-13 01:32:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 01:32:21,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:21,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:21,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:21,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:21,255 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1866993797, now seen corresponding path program 1 times [2021-11-13 01:32:21,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:21,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843930014] [2021-11-13 01:32:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:21,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:21,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:21,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:21,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:32:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:21,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:32:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:22,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:22,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:22,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843930014] [2021-11-13 01:32:22,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843930014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:22,802 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:22,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 01:32:22,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743537541] [2021-11-13 01:32:22,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:22,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:32:22,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:32:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:32:22,805 INFO L87 Difference]: Start difference. First operand 535 states and 853 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 01:32:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:23,028 INFO L93 Difference]: Finished difference Result 1028 states and 1660 transitions. [2021-11-13 01:32:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:32:23,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 109 [2021-11-13 01:32:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:23,037 INFO L225 Difference]: With dead ends: 1028 [2021-11-13 01:32:23,037 INFO L226 Difference]: Without dead ends: 523 [2021-11-13 01:32:23,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:32:23,044 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 137 mSDsluCounter, 3245 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 4067 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.81ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:23,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 4067 Invalid, 70 Unknown, 0 Unchecked, 11.62ms Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 147.81ms Time] [2021-11-13 01:32:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-13 01:32:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 514. [2021-11-13 01:32:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 399 states have (on average 1.6140350877192982) internal successors, (644), 414 states have internal predecessors, (644), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-13 01:32:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 825 transitions. [2021-11-13 01:32:23,081 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 825 transitions. Word has length 109 [2021-11-13 01:32:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:23,081 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 825 transitions. [2021-11-13 01:32:23,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 01:32:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 825 transitions. [2021-11-13 01:32:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 01:32:23,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:23,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:23,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:23,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:23,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -825523254, now seen corresponding path program 1 times [2021-11-13 01:32:23,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:23,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274308037] [2021-11-13 01:32:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:23,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:23,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:23,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:32:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:23,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:32:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:24,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:25,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:25,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274308037] [2021-11-13 01:32:25,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274308037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:25,032 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:32:25,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 01:32:25,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25677376] [2021-11-13 01:32:25,033 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:25,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:32:25,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:25,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:32:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:32:25,035 INFO L87 Difference]: Start difference. First operand 514 states and 825 transitions. Second operand has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 01:32:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:25,435 INFO L93 Difference]: Finished difference Result 997 states and 1615 transitions. [2021-11-13 01:32:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:32:25,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 112 [2021-11-13 01:32:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:25,451 INFO L225 Difference]: With dead ends: 997 [2021-11-13 01:32:25,451 INFO L226 Difference]: Without dead ends: 519 [2021-11-13 01:32:25,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 211 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 01:32:25,459 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 72 mSDsluCounter, 5437 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 216.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6219 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.74ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 243.51ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:25,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 6219 Invalid, 169 Unknown, 0 Unchecked, 39.74ms Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 243.51ms Time] [2021-11-13 01:32:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-13 01:32:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 516. [2021-11-13 01:32:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 401 states have (on average 1.6084788029925188) internal successors, (645), 416 states have internal predecessors, (645), 91 states have call successors, (91), 24 states have call predecessors, (91), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-13 01:32:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 826 transitions. [2021-11-13 01:32:25,501 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 826 transitions. Word has length 112 [2021-11-13 01:32:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:25,504 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 826 transitions. [2021-11-13 01:32:25,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 4 states have call successors, (21), 2 states have call predecessors, (21), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-13 01:32:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 826 transitions. [2021-11-13 01:32:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 01:32:25,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:25,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:25,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:25,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:25,727 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1609037407, now seen corresponding path program 1 times [2021-11-13 01:32:25,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:25,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723995304] [2021-11-13 01:32:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:25,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:25,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:25,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:25,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:32:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:32:26,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:26,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:32:27,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:27,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723995304] [2021-11-13 01:32:27,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723995304] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:32:27,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:32:27,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 01:32:27,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440619257] [2021-11-13 01:32:27,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:27,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:32:27,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:32:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:32:27,212 INFO L87 Difference]: Start difference. First operand 516 states and 826 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:32:29,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:31,261 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 01:32:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:32,464 INFO L93 Difference]: Finished difference Result 993 states and 1633 transitions. [2021-11-13 01:32:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2021-11-13 01:32:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:32,472 INFO L225 Difference]: With dead ends: 993 [2021-11-13 01:32:32,473 INFO L226 Difference]: Without dead ends: 520 [2021-11-13 01:32:32,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:32:32,487 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 746 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4946.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.73ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5152.07ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:32,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1989 Invalid, 428 Unknown, 0 Unchecked, 15.73ms Time], IncrementalHoareTripleChecker [16 Valid, 410 Invalid, 2 Unknown, 0 Unchecked, 5152.07ms Time] [2021-11-13 01:32:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-13 01:32:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2021-11-13 01:32:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 404 states have (on average 1.603960396039604) internal successors, (648), 419 states have internal predecessors, (648), 91 states have call successors, (91), 25 states have call predecessors, (91), 24 states have return successors, (91), 88 states have call predecessors, (91), 90 states have call successors, (91) [2021-11-13 01:32:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 830 transitions. [2021-11-13 01:32:32,544 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 830 transitions. Word has length 113 [2021-11-13 01:32:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:32,552 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 830 transitions. [2021-11-13 01:32:32,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:32:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 830 transitions. [2021-11-13 01:32:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:32:32,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:32,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:32,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:32,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:32,775 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -306671440, now seen corresponding path program 1 times [2021-11-13 01:32:32,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:32,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695329536] [2021-11-13 01:32:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:32,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:32,778 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:32,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:32:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:33,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:32:33,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:32:33,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:32:34,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:34,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695329536] [2021-11-13 01:32:34,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695329536] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:32:34,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:32:34,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 01:32:34,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510196866] [2021-11-13 01:32:34,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:34,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:32:34,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:32:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:32:34,227 INFO L87 Difference]: Start difference. First operand 520 states and 830 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:32:36,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:38,271 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 01:32:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:39,461 INFO L93 Difference]: Finished difference Result 1002 states and 1640 transitions. [2021-11-13 01:32:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-13 01:32:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:39,469 INFO L225 Difference]: With dead ends: 1002 [2021-11-13 01:32:39,470 INFO L226 Difference]: Without dead ends: 525 [2021-11-13 01:32:39,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:32:39,477 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 753 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4970.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.60ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5136.68ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:39,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 1990 Invalid, 430 Unknown, 0 Unchecked, 11.60ms Time], IncrementalHoareTripleChecker [14 Valid, 414 Invalid, 2 Unknown, 0 Unchecked, 5136.68ms Time] [2021-11-13 01:32:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-13 01:32:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-13 01:32:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 408 states have (on average 1.5980392156862746) internal successors, (652), 423 states have internal predecessors, (652), 91 states have call successors, (91), 26 states have call predecessors, (91), 25 states have return successors, (92), 88 states have call predecessors, (92), 90 states have call successors, (92) [2021-11-13 01:32:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 835 transitions. [2021-11-13 01:32:39,515 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 835 transitions. Word has length 116 [2021-11-13 01:32:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:39,515 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 835 transitions. [2021-11-13 01:32:39,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:32:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 835 transitions. [2021-11-13 01:32:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 01:32:39,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:39,522 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:39,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:39,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:39,744 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -869901509, now seen corresponding path program 1 times [2021-11-13 01:32:39,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:39,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523656419] [2021-11-13 01:32:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:39,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:39,748 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:39,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:32:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:32:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 01:32:40,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 01:32:41,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:41,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523656419] [2021-11-13 01:32:41,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523656419] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:32:41,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:32:41,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 01:32:41,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496959689] [2021-11-13 01:32:41,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:41,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:32:41,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:32:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:32:41,190 INFO L87 Difference]: Start difference. First operand 525 states and 835 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:32:43,214 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 01:32:45,220 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 01:32:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:46,353 INFO L93 Difference]: Finished difference Result 1013 states and 1649 transitions. [2021-11-13 01:32:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-11-13 01:32:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:46,360 INFO L225 Difference]: With dead ends: 1013 [2021-11-13 01:32:46,361 INFO L226 Difference]: Without dead ends: 531 [2021-11-13 01:32:46,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:32:46,368 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 747 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4913.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.14ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5077.63ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:46,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1990 Invalid, 429 Unknown, 0 Unchecked, 10.14ms Time], IncrementalHoareTripleChecker [12 Valid, 415 Invalid, 2 Unknown, 0 Unchecked, 5077.63ms Time] [2021-11-13 01:32:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-13 01:32:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-13 01:32:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 413 states have (on average 1.5907990314769975) internal successors, (657), 428 states have internal predecessors, (657), 91 states have call successors, (91), 27 states have call predecessors, (91), 26 states have return successors, (93), 88 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-13 01:32:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 841 transitions. [2021-11-13 01:32:46,427 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 841 transitions. Word has length 119 [2021-11-13 01:32:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:46,428 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 841 transitions. [2021-11-13 01:32:46,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:32:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 841 transitions. [2021-11-13 01:32:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 01:32:46,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:46,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:46,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:46,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:46,651 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:46,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1862775100, now seen corresponding path program 1 times [2021-11-13 01:32:46,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:46,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270528165] [2021-11-13 01:32:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:46,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:46,655 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:46,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:32:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:47,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:32:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:32:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:32:48,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:48,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270528165] [2021-11-13 01:32:48,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270528165] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:32:48,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:32:48,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-13 01:32:48,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288482580] [2021-11-13 01:32:48,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:48,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:32:48,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:32:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:32:48,060 INFO L87 Difference]: Start difference. First operand 531 states and 841 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:32:50,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:52,110 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 01:32:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:53,221 INFO L93 Difference]: Finished difference Result 1026 states and 1660 transitions. [2021-11-13 01:32:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:53,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2021-11-13 01:32:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:53,230 INFO L225 Difference]: With dead ends: 1026 [2021-11-13 01:32:53,230 INFO L226 Difference]: Without dead ends: 538 [2021-11-13 01:32:53,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:32:53,238 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 756 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4919.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.03ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5083.82ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:53,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1990 Invalid, 428 Unknown, 0 Unchecked, 8.03ms Time], IncrementalHoareTripleChecker [10 Valid, 416 Invalid, 2 Unknown, 0 Unchecked, 5083.82ms Time] [2021-11-13 01:32:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-13 01:32:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-13 01:32:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.5823389021479715) internal successors, (663), 434 states have internal predecessors, (663), 91 states have call successors, (91), 28 states have call predecessors, (91), 27 states have return successors, (94), 88 states have call predecessors, (94), 90 states have call successors, (94) [2021-11-13 01:32:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 848 transitions. [2021-11-13 01:32:53,273 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 848 transitions. Word has length 122 [2021-11-13 01:32:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:53,274 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 848 transitions. [2021-11-13 01:32:53,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:32:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 848 transitions. [2021-11-13 01:32:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 01:32:53,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:53,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:32:53,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:53,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:53,502 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:32:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1337259497, now seen corresponding path program 1 times [2021-11-13 01:32:53,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:53,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707998218] [2021-11-13 01:32:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:53,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:53,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:53,506 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:53,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:32:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:54,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 01:32:54,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 01:32:54,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 01:32:55,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:55,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707998218] [2021-11-13 01:32:55,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707998218] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:32:55,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:32:55,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-13 01:32:55,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412045608] [2021-11-13 01:32:55,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:55,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:32:55,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:32:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:32:55,364 INFO L87 Difference]: Start difference. First operand 538 states and 848 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 01:32:57,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:59,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:01,423 WARN L515 Checker$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 01:33:03,429 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 01:33:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:13,549 INFO L93 Difference]: Finished difference Result 1824 states and 2955 transitions. [2021-11-13 01:33:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 01:33:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 125 [2021-11-13 01:33:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:13,568 INFO L225 Difference]: With dead ends: 1824 [2021-11-13 01:33:13,568 INFO L226 Difference]: Without dead ends: 1329 [2021-11-13 01:33:13,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:33:13,576 INFO L933 BasicCegarLoop]: 1411 mSDtfsCounter, 1612 mSDsluCounter, 3583 mSDsCounter, 0 mSdLazyCounter, 6222 mSolverCounterSat, 617 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16503.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 4994 SdHoareTripleChecker+Invalid, 6843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.54ms SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 6222 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17775.03ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:13,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1714 Valid, 4994 Invalid, 6843 Unknown, 0 Unchecked, 61.54ms Time], IncrementalHoareTripleChecker [617 Valid, 6222 Invalid, 4 Unknown, 0 Unchecked, 17775.03ms Time] [2021-11-13 01:33:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-11-13 01:33:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1107. [2021-11-13 01:33:13,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 840 states have (on average 1.5869047619047618) internal successors, (1333), 877 states have internal predecessors, (1333), 208 states have call successors, (208), 53 states have call predecessors, (208), 58 states have return successors, (233), 207 states have call predecessors, (233), 206 states have call successors, (233) [2021-11-13 01:33:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1774 transitions. [2021-11-13 01:33:13,712 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1774 transitions. Word has length 125 [2021-11-13 01:33:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:13,712 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1774 transitions. [2021-11-13 01:33:13,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 01:33:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1774 transitions. [2021-11-13 01:33:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 01:33:13,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:13,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:13,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:13,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:13,945 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:13,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1498210996, now seen corresponding path program 1 times [2021-11-13 01:33:13,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:13,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272991340] [2021-11-13 01:33:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:13,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:13,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:13,948 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:14,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:33:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:14,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:33:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 01:33:14,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 01:33:15,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:15,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272991340] [2021-11-13 01:33:15,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272991340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:15,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:15,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-13 01:33:15,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687617569] [2021-11-13 01:33:15,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:15,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:33:15,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:33:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:33:15,486 INFO L87 Difference]: Start difference. First operand 1107 states and 1774 transitions. Second operand has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 01:33:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:15,867 INFO L93 Difference]: Finished difference Result 2141 states and 3455 transitions. [2021-11-13 01:33:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:33:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 128 [2021-11-13 01:33:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:15,884 INFO L225 Difference]: With dead ends: 2141 [2021-11-13 01:33:15,884 INFO L226 Difference]: Without dead ends: 1067 [2021-11-13 01:33:15,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:33:15,895 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 85 mSDsluCounter, 4665 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 5447 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.81ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.10ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:15,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 5447 Invalid, 151 Unknown, 0 Unchecked, 13.81ms Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 239.10ms Time] [2021-11-13 01:33:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-13 01:33:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1064. [2021-11-13 01:33:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 808 states have (on average 1.5940594059405941) internal successors, (1288), 844 states have internal predecessors, (1288), 202 states have call successors, (202), 50 states have call predecessors, (202), 53 states have return successors, (220), 200 states have call predecessors, (220), 200 states have call successors, (220) [2021-11-13 01:33:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1710 transitions. [2021-11-13 01:33:15,979 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1710 transitions. Word has length 128 [2021-11-13 01:33:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:15,980 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1710 transitions. [2021-11-13 01:33:15,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 01:33:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1710 transitions. [2021-11-13 01:33:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 01:33:15,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:15,986 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:16,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:16,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:16,199 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:16,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:16,199 INFO L85 PathProgramCache]: Analyzing trace with hash -116011409, now seen corresponding path program 1 times [2021-11-13 01:33:16,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:16,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105651845] [2021-11-13 01:33:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:16,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:16,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:16,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:16,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:33:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:33:16,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:33:17,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 01:33:17,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:17,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105651845] [2021-11-13 01:33:17,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105651845] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:33:17,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:33:17,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-13 01:33:17,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911678843] [2021-11-13 01:33:17,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:17,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:33:17,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:33:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:33:17,960 INFO L87 Difference]: Start difference. First operand 1064 states and 1710 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:33:19,986 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 01:33:21,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:23,999 WARN L515 Checker$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 01:33:26,007 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 01:33:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:30,801 INFO L93 Difference]: Finished difference Result 2663 states and 4331 transitions. [2021-11-13 01:33:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:33:30,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 131 [2021-11-13 01:33:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:30,821 INFO L225 Difference]: With dead ends: 2663 [2021-11-13 01:33:30,822 INFO L226 Difference]: Without dead ends: 1639 [2021-11-13 01:33:30,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:33:30,834 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 1911 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 486 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11938.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 3084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.16ms SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12594.58ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:30,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2011 Valid, 1871 Invalid, 3084 Unknown, 0 Unchecked, 23.16ms Time], IncrementalHoareTripleChecker [486 Valid, 2594 Invalid, 4 Unknown, 0 Unchecked, 12594.58ms Time] [2021-11-13 01:33:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-11-13 01:33:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1598. [2021-11-13 01:33:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1203 states have (on average 1.597672485453034) internal successors, (1922), 1260 states have internal predecessors, (1922), 313 states have call successors, (313), 72 states have call predecessors, (313), 81 states have return successors, (356), 314 states have call predecessors, (356), 310 states have call successors, (356) [2021-11-13 01:33:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2591 transitions. [2021-11-13 01:33:30,961 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2591 transitions. Word has length 131 [2021-11-13 01:33:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:30,962 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2591 transitions. [2021-11-13 01:33:30,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:33:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2591 transitions. [2021-11-13 01:33:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 01:33:30,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:30,968 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:30,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:31,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:31,188 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -823398580, now seen corresponding path program 1 times [2021-11-13 01:33:31,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:31,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540041483] [2021-11-13 01:33:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:31,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:31,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:31,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:31,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:33:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:31,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:33:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:33:32,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 01:33:32,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:32,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540041483] [2021-11-13 01:33:32,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540041483] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:33:32,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:33:32,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-13 01:33:32,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061494181] [2021-11-13 01:33:32,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:32,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:33:32,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:33:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:33:32,737 INFO L87 Difference]: Start difference. First operand 1598 states and 2591 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:33:34,761 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 01:33:36,768 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 01:33:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:38,063 INFO L93 Difference]: Finished difference Result 4572 states and 7482 transitions. [2021-11-13 01:33:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:33:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2021-11-13 01:33:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:38,098 INFO L225 Difference]: With dead ends: 4572 [2021-11-13 01:33:38,098 INFO L226 Difference]: Without dead ends: 3014 [2021-11-13 01:33:38,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:33:38,115 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 639 mSDsluCounter, 2193 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4968.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.03ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5154.32ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:38,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 3128 Invalid, 629 Unknown, 0 Unchecked, 9.03ms Time], IncrementalHoareTripleChecker [23 Valid, 604 Invalid, 2 Unknown, 0 Unchecked, 5154.32ms Time] [2021-11-13 01:33:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-11-13 01:33:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 2999. [2021-11-13 01:33:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2240 states have (on average 1.5758928571428572) internal successors, (3530), 2350 states have internal predecessors, (3530), 604 states have call successors, (604), 144 states have call predecessors, (604), 154 states have return successors, (683), 599 states have call predecessors, (683), 598 states have call successors, (683) [2021-11-13 01:33:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 4817 transitions. [2021-11-13 01:33:38,362 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 4817 transitions. Word has length 132 [2021-11-13 01:33:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:38,363 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 4817 transitions. [2021-11-13 01:33:38,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:33:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 4817 transitions. [2021-11-13 01:33:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 01:33:38,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:38,369 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:38,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:33:38,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:38,591 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash 709127910, now seen corresponding path program 1 times [2021-11-13 01:33:38,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:38,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754559471] [2021-11-13 01:33:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:38,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:38,595 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:38,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:33:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:39,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:33:39,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:33:39,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 01:33:40,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:40,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754559471] [2021-11-13 01:33:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754559471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:40,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 8 [2021-11-13 01:33:40,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610426284] [2021-11-13 01:33:40,011 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:40,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:33:40,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:33:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:33:40,013 INFO L87 Difference]: Start difference. First operand 2999 states and 4817 transitions. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-13 01:33:42,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:44,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:46,067 WARN L515 Checker$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 01:33:48,072 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 01:33:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:50,772 INFO L93 Difference]: Finished difference Result 8856 states and 14442 transitions. [2021-11-13 01:33:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:33:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 134 [2021-11-13 01:33:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:50,834 INFO L225 Difference]: With dead ends: 8856 [2021-11-13 01:33:50,834 INFO L226 Difference]: Without dead ends: 5897 [2021-11-13 01:33:50,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:33:50,868 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 1506 mSDsluCounter, 3569 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 15 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10000.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 5125 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.02ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10343.30ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:50,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 5125 Invalid, 1211 Unknown, 0 Unchecked, 15.02ms Time], IncrementalHoareTripleChecker [15 Valid, 1192 Invalid, 4 Unknown, 0 Unchecked, 10343.30ms Time] [2021-11-13 01:33:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2021-11-13 01:33:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 5871. [2021-11-13 01:33:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 4386 states have (on average 1.5713634290925673) internal successors, (6892), 4605 states have internal predecessors, (6892), 1179 states have call successors, (1179), 285 states have call predecessors, (1179), 305 states have return successors, (1478), 1170 states have call predecessors, (1478), 1167 states have call successors, (1478) [2021-11-13 01:33:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9549 transitions. [2021-11-13 01:33:51,787 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 9549 transitions. Word has length 134 [2021-11-13 01:33:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:51,790 INFO L470 AbstractCegarLoop]: Abstraction has 5871 states and 9549 transitions. [2021-11-13 01:33:51,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 3 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-13 01:33:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 9549 transitions. [2021-11-13 01:33:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 01:33:51,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:51,814 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:51,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 01:33:52,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:33:52,027 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:52,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1804339451, now seen corresponding path program 1 times [2021-11-13 01:33:52,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:33:52,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777694953] [2021-11-13 01:33:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:52,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:33:52,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:33:52,029 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:33:52,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:33:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:52,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:33:52,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:33:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:33:53,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:33:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 01:33:53,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:33:53,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777694953] [2021-11-13 01:33:53,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777694953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:53,526 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:53,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-13 01:33:53,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079508748] [2021-11-13 01:33:53,527 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:53,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:33:53,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:33:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:33:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:33:53,529 INFO L87 Difference]: Start difference. First operand 5871 states and 9549 transitions. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-13 01:33:55,563 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 01:33:57,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:33:59,575 WARN L515 Checker$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 01:34:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:01,830 INFO L93 Difference]: Finished difference Result 13513 states and 22085 transitions. [2021-11-13 01:34:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:34:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) Word has length 134 [2021-11-13 01:34:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:01,971 INFO L225 Difference]: With dead ends: 13513 [2021-11-13 01:34:01,972 INFO L226 Difference]: Without dead ends: 9776 [2021-11-13 01:34:01,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:34:01,994 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 1603 mSDsluCounter, 2411 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 93 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7443.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.13ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7680.27ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:01,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 3306 Invalid, 806 Unknown, 0 Unchecked, 11.13ms Time], IncrementalHoareTripleChecker [93 Valid, 710 Invalid, 3 Unknown, 0 Unchecked, 7680.27ms Time] [2021-11-13 01:34:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9776 states. [2021-11-13 01:34:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9776 to 9516. [2021-11-13 01:34:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 7156 states have (on average 1.563163778647289) internal successors, (11186), 7499 states have internal predecessors, (11186), 1826 states have call successors, (1826), 471 states have call predecessors, (1826), 533 states have return successors, (2387), 1833 states have call predecessors, (2387), 1808 states have call successors, (2387) [2021-11-13 01:34:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 15399 transitions. [2021-11-13 01:34:02,950 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 15399 transitions. Word has length 134 [2021-11-13 01:34:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:02,951 INFO L470 AbstractCegarLoop]: Abstraction has 9516 states and 15399 transitions. [2021-11-13 01:34:02,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 5 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-13 01:34:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 15399 transitions. [2021-11-13 01:34:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 01:34:02,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:02,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:02,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:03,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:03,183 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:03,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash 997153669, now seen corresponding path program 1 times [2021-11-13 01:34:03,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:03,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712111068] [2021-11-13 01:34:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:03,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:03,186 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:03,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:34:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:03,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 01:34:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 01:34:04,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 01:34:05,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:05,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712111068] [2021-11-13 01:34:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712111068] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:05,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:34:05,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-13 01:34:05,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779148121] [2021-11-13 01:34:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:05,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:34:05,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:34:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:34:05,291 INFO L87 Difference]: Start difference. First operand 9516 states and 15399 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 01:34:07,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:09,322 WARN L515 Checker$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 01:34:11,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:13,335 WARN L515 Checker$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 01:34:15,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:17,348 WARN L515 Checker$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 01:34:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:24,529 INFO L93 Difference]: Finished difference Result 16814 states and 27206 transitions. [2021-11-13 01:34:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:34:24,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 136 [2021-11-13 01:34:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:24,602 INFO L225 Difference]: With dead ends: 16814 [2021-11-13 01:34:24,602 INFO L226 Difference]: Without dead ends: 9626 [2021-11-13 01:34:24,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:34:24,639 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 1830 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 4009 mSolverCounterSat, 461 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17548.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1932 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 4476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.18ms SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 4009 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18382.38ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:24,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1932 Valid, 2586 Invalid, 4476 Unknown, 0 Unchecked, 28.18ms Time], IncrementalHoareTripleChecker [461 Valid, 4009 Invalid, 6 Unknown, 0 Unchecked, 18382.38ms Time] [2021-11-13 01:34:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9626 states. [2021-11-13 01:34:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9626 to 9472. [2021-11-13 01:34:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9472 states, 7132 states have (on average 1.562815479528884) internal successors, (11146), 7475 states have internal predecessors, (11146), 1810 states have call successors, (1810), 467 states have call predecessors, (1810), 529 states have return successors, (2371), 1817 states have call predecessors, (2371), 1792 states have call successors, (2371) [2021-11-13 01:34:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 15327 transitions. [2021-11-13 01:34:25,628 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 15327 transitions. Word has length 136 [2021-11-13 01:34:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:25,629 INFO L470 AbstractCegarLoop]: Abstraction has 9472 states and 15327 transitions. [2021-11-13 01:34:25,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 01:34:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 15327 transitions. [2021-11-13 01:34:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 01:34:25,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:25,636 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:25,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:25,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:25,851 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash -928676863, now seen corresponding path program 1 times [2021-11-13 01:34:25,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:25,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47946921] [2021-11-13 01:34:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:25,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:25,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:25,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:25,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:34:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:34:26,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:34:26,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 01:34:27,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:27,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47946921] [2021-11-13 01:34:27,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47946921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:27,692 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:27,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-13 01:34:27,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532168175] [2021-11-13 01:34:27,693 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:27,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 01:34:27,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:27,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 01:34:27,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:34:27,695 INFO L87 Difference]: Start difference. First operand 9472 states and 15327 transitions. Second operand has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 01:34:29,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:31,741 WARN L515 Checker$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 01:34:33,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:34:35,753 WARN L515 Checker$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 01:34:37,757 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 01:34:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:42,776 INFO L93 Difference]: Finished difference Result 23908 states and 38862 transitions. [2021-11-13 01:34:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 01:34:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 139 [2021-11-13 01:34:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:42,907 INFO L225 Difference]: With dead ends: 23908 [2021-11-13 01:34:42,907 INFO L226 Difference]: Without dead ends: 16594 [2021-11-13 01:34:42,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:34:42,962 INFO L933 BasicCegarLoop]: 1115 mSDtfsCounter, 2158 mSDsluCounter, 4543 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 218 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13433.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2170 SdHoareTripleChecker+Valid, 5658 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.41ms SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13928.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:42,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2170 Valid, 5658 Invalid, 2336 Unknown, 0 Unchecked, 20.41ms Time], IncrementalHoareTripleChecker [218 Valid, 2113 Invalid, 5 Unknown, 0 Unchecked, 13928.53ms Time] [2021-11-13 01:34:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16594 states. [2021-11-13 01:34:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16594 to 16472. [2021-11-13 01:34:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16472 states, 12444 states have (on average 1.544037287045966) internal successors, (19214), 13031 states have internal predecessors, (19214), 3060 states have call successors, (3060), 855 states have call predecessors, (3060), 967 states have return successors, (4209), 3069 states have call predecessors, (4209), 3030 states have call successors, (4209) [2021-11-13 01:34:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16472 states to 16472 states and 26483 transitions. [2021-11-13 01:34:44,550 INFO L78 Accepts]: Start accepts. Automaton has 16472 states and 26483 transitions. Word has length 139 [2021-11-13 01:34:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:44,550 INFO L470 AbstractCegarLoop]: Abstraction has 16472 states and 26483 transitions. [2021-11-13 01:34:44,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 01:34:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 16472 states and 26483 transitions. [2021-11-13 01:34:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 01:34:44,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:44,557 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:44,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:44,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:44,780 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1028593816, now seen corresponding path program 1 times [2021-11-13 01:34:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:44,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865626140] [2021-11-13 01:34:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:44,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:44,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:44,784 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:44,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:34:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:34:45,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:34:45,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 01:34:46,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:46,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865626140] [2021-11-13 01:34:46,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865626140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:46,363 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:46,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 01:34:46,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123419332] [2021-11-13 01:34:46,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:46,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:34:46,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:34:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:34:46,366 INFO L87 Difference]: Start difference. First operand 16472 states and 26483 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-13 01:34:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:47,791 INFO L93 Difference]: Finished difference Result 32224 states and 52196 transitions. [2021-11-13 01:34:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 146 [2021-11-13 01:34:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:47,929 INFO L225 Difference]: With dead ends: 32224 [2021-11-13 01:34:47,929 INFO L226 Difference]: Without dead ends: 16500 [2021-11-13 01:34:48,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:34:48,183 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 700 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.63ms SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:48,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 2370 Invalid, 147 Unknown, 0 Unchecked, 4.63ms Time], IncrementalHoareTripleChecker [61 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 159.41ms Time] [2021-11-13 01:34:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16500 states. [2021-11-13 01:34:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16500 to 16480. [2021-11-13 01:34:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16480 states, 12448 states have (on average 1.5226542416452442) internal successors, (18954), 13039 states have internal predecessors, (18954), 3060 states have call successors, (3060), 855 states have call predecessors, (3060), 971 states have return successors, (4215), 3069 states have call predecessors, (4215), 3030 states have call successors, (4215) [2021-11-13 01:34:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16480 states to 16480 states and 26229 transitions. [2021-11-13 01:34:49,438 INFO L78 Accepts]: Start accepts. Automaton has 16480 states and 26229 transitions. Word has length 146 [2021-11-13 01:34:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:49,439 INFO L470 AbstractCegarLoop]: Abstraction has 16480 states and 26229 transitions. [2021-11-13 01:34:49,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 6 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-13 01:34:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 16480 states and 26229 transitions. [2021-11-13 01:34:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 01:34:49,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:49,445 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:49,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:34:49,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:49,659 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1050870202, now seen corresponding path program 1 times [2021-11-13 01:34:49,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:49,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326264539] [2021-11-13 01:34:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:49,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:49,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:49,663 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:49,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:34:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:50,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:34:50,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 01:34:50,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 01:34:51,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:51,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326264539] [2021-11-13 01:34:51,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326264539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:51,406 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:51,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-13 01:34:51,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349129390] [2021-11-13 01:34:51,407 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:51,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:34:51,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:34:51,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:51,409 INFO L87 Difference]: Start difference. First operand 16480 states and 26229 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 01:34:53,443 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 01:34:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:55,378 INFO L93 Difference]: Finished difference Result 30546 states and 49150 transitions. [2021-11-13 01:34:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:34:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 151 [2021-11-13 01:34:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:55,584 INFO L225 Difference]: With dead ends: 30546 [2021-11-13 01:34:55,584 INFO L226 Difference]: Without dead ends: 16752 [2021-11-13 01:34:55,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:34:55,644 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 1317 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2647.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.41ms SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2761.11ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:55,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 3066 Invalid, 456 Unknown, 0 Unchecked, 8.41ms Time], IncrementalHoareTripleChecker [211 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2761.11ms Time] [2021-11-13 01:34:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16752 states. [2021-11-13 01:34:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16752 to 16630. [2021-11-13 01:34:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16630 states, 12532 states have (on average 1.51915097350782) internal successors, (19038), 13165 states have internal predecessors, (19038), 3108 states have call successors, (3108), 879 states have call predecessors, (3108), 989 states have return successors, (4383), 3069 states have call predecessors, (4383), 3078 states have call successors, (4383) [2021-11-13 01:34:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16630 states to 16630 states and 26529 transitions. [2021-11-13 01:34:56,722 INFO L78 Accepts]: Start accepts. Automaton has 16630 states and 26529 transitions. Word has length 151 [2021-11-13 01:34:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:56,723 INFO L470 AbstractCegarLoop]: Abstraction has 16630 states and 26529 transitions. [2021-11-13 01:34:56,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-13 01:34:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 16630 states and 26529 transitions. [2021-11-13 01:34:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 01:34:56,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:56,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:56,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-13 01:34:56,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:34:56,964 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1401758162, now seen corresponding path program 1 times [2021-11-13 01:34:56,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:56,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012472708] [2021-11-13 01:34:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:56,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:56,966 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:56,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:34:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:34:57,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 01:34:58,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 01:34:58,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:58,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012472708] [2021-11-13 01:34:58,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012472708] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:34:58,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:34:58,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 01:34:58,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635493233] [2021-11-13 01:34:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:58,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:34:58,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:34:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:34:58,646 INFO L87 Difference]: Start difference. First operand 16630 states and 26529 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 01:35:00,679 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 01:35:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:06,029 INFO L93 Difference]: Finished difference Result 33825 states and 54468 transitions. [2021-11-13 01:35:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 01:35:06,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2021-11-13 01:35:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:06,142 INFO L225 Difference]: With dead ends: 33825 [2021-11-13 01:35:06,142 INFO L226 Difference]: Without dead ends: 19873 [2021-11-13 01:35:06,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:35:06,215 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 1404 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 3273 mSolverCounterSat, 143 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5261.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 2820 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.35ms SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3273 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5793.02ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:06,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 2820 Invalid, 3417 Unknown, 0 Unchecked, 22.35ms Time], IncrementalHoareTripleChecker [143 Valid, 3273 Invalid, 1 Unknown, 0 Unchecked, 5793.02ms Time] [2021-11-13 01:35:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19873 states. [2021-11-13 01:35:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19873 to 18385. [2021-11-13 01:35:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18385 states, 13926 states have (on average 1.5089042079563406) internal successors, (21013), 14581 states have internal predecessors, (21013), 3316 states have call successors, (3316), 997 states have call predecessors, (3316), 1142 states have return successors, (4721), 3266 states have call predecessors, (4721), 3289 states have call successors, (4721) [2021-11-13 01:35:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18385 states to 18385 states and 29050 transitions. [2021-11-13 01:35:07,884 INFO L78 Accepts]: Start accepts. Automaton has 18385 states and 29050 transitions. Word has length 156 [2021-11-13 01:35:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:07,885 INFO L470 AbstractCegarLoop]: Abstraction has 18385 states and 29050 transitions. [2021-11-13 01:35:07,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 01:35:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 18385 states and 29050 transitions. [2021-11-13 01:35:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 01:35:07,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:07,892 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:07,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-13 01:35:08,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:08,107 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2103358036, now seen corresponding path program 1 times [2021-11-13 01:35:08,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:08,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570739508] [2021-11-13 01:35:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:08,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:08,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:08,111 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:08,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:35:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 01:35:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-13 01:35:09,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-13 01:35:09,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:09,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570739508] [2021-11-13 01:35:09,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570739508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:35:09,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:35:09,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 13 [2021-11-13 01:35:09,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953307148] [2021-11-13 01:35:09,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:09,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:35:09,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:09,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:35:09,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:35:09,843 INFO L87 Difference]: Start difference. First operand 18385 states and 29050 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-13 01:35:11,865 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 01:35:13,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:15,877 WARN L515 Checker$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 01:35:17,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:19,887 WARN L515 Checker$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 01:35:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:27,790 INFO L93 Difference]: Finished difference Result 36620 states and 58396 transitions. [2021-11-13 01:35:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:35:27,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) Word has length 156 [2021-11-13 01:35:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:27,853 INFO L225 Difference]: With dead ends: 36620 [2021-11-13 01:35:27,853 INFO L226 Difference]: Without dead ends: 9483 [2021-11-13 01:35:27,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:35:27,971 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 1761 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 5167 mSolverCounterSat, 458 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15520.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 3449 SdHoareTripleChecker+Invalid, 5630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.99ms SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 5167 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16500.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:27,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1862 Valid, 3449 Invalid, 5630 Unknown, 0 Unchecked, 31.99ms Time], IncrementalHoareTripleChecker [458 Valid, 5167 Invalid, 5 Unknown, 0 Unchecked, 16500.88ms Time] [2021-11-13 01:35:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2021-11-13 01:35:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 9390. [2021-11-13 01:35:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9390 states, 7297 states have (on average 1.518432232424284) internal successors, (11080), 7595 states have internal predecessors, (11080), 1493 states have call successors, (1493), 554 states have call predecessors, (1493), 599 states have return successors, (2033), 1442 states have call predecessors, (2033), 1484 states have call successors, (2033) [2021-11-13 01:35:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9390 states to 9390 states and 14606 transitions. [2021-11-13 01:35:28,716 INFO L78 Accepts]: Start accepts. Automaton has 9390 states and 14606 transitions. Word has length 156 [2021-11-13 01:35:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:28,717 INFO L470 AbstractCegarLoop]: Abstraction has 9390 states and 14606 transitions. [2021-11-13 01:35:28,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 10 states have internal predecessors, (162), 5 states have call successors, (31), 5 states have call predecessors, (31), 9 states have return successors, (32), 8 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-13 01:35:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 9390 states and 14606 transitions. [2021-11-13 01:35:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-13 01:35:28,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:28,755 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:28,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-13 01:35:28,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:28,956 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:28,957 INFO L85 PathProgramCache]: Analyzing trace with hash -591866695, now seen corresponding path program 1 times [2021-11-13 01:35:28,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:28,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473887615] [2021-11-13 01:35:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:28,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:28,959 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:28,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:35:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1828 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:35:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2021-11-13 01:35:30,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2021-11-13 01:35:31,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:31,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473887615] [2021-11-13 01:35:31,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473887615] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:35:31,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:35:31,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-13 01:35:31,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765648790] [2021-11-13 01:35:31,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:31,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:35:31,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:31,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:35:31,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:35:31,722 INFO L87 Difference]: Start difference. First operand 9390 states and 14606 transitions. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-13 01:35:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:32,306 INFO L93 Difference]: Finished difference Result 18618 states and 29445 transitions. [2021-11-13 01:35:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:35:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 489 [2021-11-13 01:35:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:32,353 INFO L225 Difference]: With dead ends: 18618 [2021-11-13 01:35:32,353 INFO L226 Difference]: Without dead ends: 10048 [2021-11-13 01:35:32,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 972 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:35:32,377 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 68 mSDsluCounter, 3177 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3986 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.73ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.89ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:32,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 3986 Invalid, 40 Unknown, 0 Unchecked, 3.73ms Time], IncrementalHoareTripleChecker [20 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 39.89ms Time] [2021-11-13 01:35:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10048 states. [2021-11-13 01:35:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10048 to 9470. [2021-11-13 01:35:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9470 states, 7361 states have (on average 1.5139247384866186) internal successors, (11144), 7659 states have internal predecessors, (11144), 1493 states have call successors, (1493), 554 states have call predecessors, (1493), 615 states have return successors, (2059), 1458 states have call predecessors, (2059), 1484 states have call successors, (2059) [2021-11-13 01:35:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9470 states to 9470 states and 14696 transitions. [2021-11-13 01:35:33,011 INFO L78 Accepts]: Start accepts. Automaton has 9470 states and 14696 transitions. Word has length 489 [2021-11-13 01:35:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:33,011 INFO L470 AbstractCegarLoop]: Abstraction has 9470 states and 14696 transitions. [2021-11-13 01:35:33,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 5 states have internal predecessors, (181), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-13 01:35:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9470 states and 14696 transitions. [2021-11-13 01:35:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-11-13 01:35:33,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:33,037 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:33,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-13 01:35:33,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:33,251 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:33,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1726937770, now seen corresponding path program 1 times [2021-11-13 01:35:33,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:33,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565868831] [2021-11-13 01:35:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:33,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:33,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:33,253 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:33,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 01:35:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:35:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 831 trivial. 0 not checked. [2021-11-13 01:35:35,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 40 proven. 37 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2021-11-13 01:35:36,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:36,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565868831] [2021-11-13 01:35:36,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565868831] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:35:36,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:35:36,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-13 01:35:36,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188970796] [2021-11-13 01:35:36,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:36,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:35:36,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:35:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:35:36,453 INFO L87 Difference]: Start difference. First operand 9470 states and 14696 transitions. Second operand has 7 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-13 01:35:38,483 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:40,487 WARN L515 Checker$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 01:35:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:46,286 INFO L93 Difference]: Finished difference Result 27270 states and 43164 transitions. [2021-11-13 01:35:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:35:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) Word has length 490 [2021-11-13 01:35:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:46,352 INFO L225 Difference]: With dead ends: 27270 [2021-11-13 01:35:46,352 INFO L226 Difference]: Without dead ends: 17656 [2021-11-13 01:35:46,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:35:46,391 INFO L933 BasicCegarLoop]: 1298 mSDtfsCounter, 2361 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 3346 mSolverCounterSat, 639 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8017.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2520 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 3987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.01ms SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 3346 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8686.98ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:46,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2520 Valid, 2400 Invalid, 3987 Unknown, 0 Unchecked, 21.01ms Time], IncrementalHoareTripleChecker [639 Valid, 3346 Invalid, 2 Unknown, 0 Unchecked, 8686.98ms Time] [2021-11-13 01:35:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17656 states. [2021-11-13 01:35:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17656 to 16833. [2021-11-13 01:35:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16833 states, 12872 states have (on average 1.5066811684275947) internal successors, (19394), 13449 states have internal predecessors, (19394), 2795 states have call successors, (2795), 1058 states have call predecessors, (2795), 1165 states have return successors, (4088), 2705 states have call predecessors, (4088), 2782 states have call successors, (4088) [2021-11-13 01:35:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16833 states to 16833 states and 26277 transitions. [2021-11-13 01:35:47,713 INFO L78 Accepts]: Start accepts. Automaton has 16833 states and 26277 transitions. Word has length 490 [2021-11-13 01:35:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:47,713 INFO L470 AbstractCegarLoop]: Abstraction has 16833 states and 26277 transitions. [2021-11-13 01:35:47,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.142857142857142) internal successors, (197), 7 states have internal predecessors, (197), 6 states have call successors, (38), 5 states have call predecessors, (38), 5 states have return successors, (36), 6 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-13 01:35:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 16833 states and 26277 transitions. [2021-11-13 01:35:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-13 01:35:47,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:47,741 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:47,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-13 01:35:47,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:47,942 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1502920694, now seen corresponding path program 1 times [2021-11-13 01:35:47,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:47,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156795615] [2021-11-13 01:35:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:47,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:47,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:47,945 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:47,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 01:35:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 01:35:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 713 proven. 27 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-13 01:35:49,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2021-11-13 01:35:51,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:51,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156795615] [2021-11-13 01:35:51,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156795615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:35:51,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [840206512] [2021-11-13 01:35:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:51,497 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:35:51,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:35:51,512 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:35:51,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-13 01:35:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:52,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:35:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 677 proven. 0 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2021-11-13 01:35:53,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2021-11-13 01:35:54,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [840206512] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:35:54,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:35:54,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11, 8] total 25 [2021-11-13 01:35:54,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183771249] [2021-11-13 01:35:54,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:54,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:35:54,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:35:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:35:54,242 INFO L87 Difference]: Start difference. First operand 16833 states and 26277 transitions. Second operand has 9 states, 8 states have (on average 28.375) internal successors, (227), 9 states have internal predecessors, (227), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-13 01:35:56,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:35:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:59,662 INFO L93 Difference]: Finished difference Result 47305 states and 75918 transitions. [2021-11-13 01:35:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 01:35:59,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 28.375) internal successors, (227), 9 states have internal predecessors, (227), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 487 [2021-11-13 01:35:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:59,782 INFO L225 Difference]: With dead ends: 47305 [2021-11-13 01:35:59,782 INFO L226 Difference]: Without dead ends: 30052 [2021-11-13 01:35:59,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1956 GetRequests, 1924 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:35:59,865 INFO L933 BasicCegarLoop]: 1302 mSDtfsCounter, 752 mSDsluCounter, 8193 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 117 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3189.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 9495 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.86ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3387.46ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:59,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 9495 Invalid, 1306 Unknown, 0 Unchecked, 16.86ms Time], IncrementalHoareTripleChecker [117 Valid, 1188 Invalid, 1 Unknown, 0 Unchecked, 3387.46ms Time] [2021-11-13 01:35:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30052 states. [2021-11-13 01:36:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30052 to 29534. [2021-11-13 01:36:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29534 states, 22405 states have (on average 1.511225172952466) internal successors, (33859), 23482 states have internal predecessors, (33859), 5134 states have call successors, (5134), 1862 states have call predecessors, (5134), 1994 states have return successors, (7587), 4949 states have call predecessors, (7587), 5111 states have call successors, (7587) [2021-11-13 01:36:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29534 states to 29534 states and 46580 transitions. [2021-11-13 01:36:01,788 INFO L78 Accepts]: Start accepts. Automaton has 29534 states and 46580 transitions. Word has length 487 [2021-11-13 01:36:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:01,789 INFO L470 AbstractCegarLoop]: Abstraction has 29534 states and 46580 transitions. [2021-11-13 01:36:01,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 28.375) internal successors, (227), 9 states have internal predecessors, (227), 3 states have call successors, (41), 2 states have call predecessors, (41), 5 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-13 01:36:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29534 states and 46580 transitions. [2021-11-13 01:36:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-13 01:36:01,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:01,832 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:01,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:02,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:02,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:02,233 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:02,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1026541371, now seen corresponding path program 1 times [2021-11-13 01:36:02,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:02,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887266974] [2021-11-13 01:36:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:02,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:02,236 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:02,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 01:36:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:03,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:36:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 754 proven. 12 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2021-11-13 01:36:04,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 71 proven. 107 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-13 01:36:05,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:05,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887266974] [2021-11-13 01:36:05,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887266974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:05,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635340603] [2021-11-13 01:36:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:05,754 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:05,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:05,759 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:05,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-13 01:36:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:06,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 01:36:06,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 674 proven. 12 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-13 01:36:07,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-11-13 01:36:08,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635340603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:08,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147343552] [2021-11-13 01:36:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:08,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:08,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:08,995 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:08,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-13 01:36:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 01:36:09,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 674 proven. 12 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-11-13 01:36:10,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-11-13 01:36:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147343552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:11,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:36:11,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9, 9, 9, 9] total 27 [2021-11-13 01:36:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071601662] [2021-11-13 01:36:11,923 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 01:36:11,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 01:36:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:36:11,927 INFO L87 Difference]: Start difference. First operand 29534 states and 46580 transitions. Second operand has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) [2021-11-13 01:36:13,969 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 01:36:15,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:17,982 WARN L515 Checker$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 01:36:19,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:36:21,995 WARN L515 Checker$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 01:36:24,002 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 01:37:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:02,990 INFO L93 Difference]: Finished difference Result 85440 states and 140258 transitions. [2021-11-13 01:37:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-13 01:37:02,992 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) Word has length 486 [2021-11-13 01:37:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:03,489 INFO L225 Difference]: With dead ends: 85440 [2021-11-13 01:37:03,489 INFO L226 Difference]: Without dead ends: 55720 [2021-11-13 01:37:03,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3006 GetRequests, 2921 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2021-11-13 01:37:03,784 INFO L933 BasicCegarLoop]: 2035 mSDtfsCounter, 14297 mSDsluCounter, 6697 mSDsCounter, 0 mSdLazyCounter, 21295 mSolverCounterSat, 6619 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39673.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14297 SdHoareTripleChecker+Valid, 8732 SdHoareTripleChecker+Invalid, 27920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 158.44ms SdHoareTripleChecker+Time, 6619 IncrementalHoareTripleChecker+Valid, 21295 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43341.32ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:03,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14297 Valid, 8732 Invalid, 27920 Unknown, 0 Unchecked, 158.44ms Time], IncrementalHoareTripleChecker [6619 Valid, 21295 Invalid, 6 Unknown, 0 Unchecked, 43341.32ms Time] [2021-11-13 01:37:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55720 states. [2021-11-13 01:37:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55720 to 43579. [2021-11-13 01:37:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43579 states, 32758 states have (on average 1.4660846205507052) internal successors, (48026), 34271 states have internal predecessors, (48026), 7522 states have call successors, (7522), 3115 states have call predecessors, (7522), 3298 states have return successors, (11752), 7149 states have call predecessors, (11752), 7498 states have call successors, (11752) [2021-11-13 01:37:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43579 states to 43579 states and 67300 transitions. [2021-11-13 01:37:07,669 INFO L78 Accepts]: Start accepts. Automaton has 43579 states and 67300 transitions. Word has length 486 [2021-11-13 01:37:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:07,670 INFO L470 AbstractCegarLoop]: Abstraction has 43579 states and 67300 transitions. [2021-11-13 01:37:07,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 18.5) internal successors, (481), 24 states have internal predecessors, (481), 16 states have call successors, (108), 9 states have call predecessors, (108), 16 states have return successors, (112), 18 states have call predecessors, (112), 16 states have call successors, (112) [2021-11-13 01:37:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 43579 states and 67300 transitions. [2021-11-13 01:37:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-13 01:37:07,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:07,707 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:07,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-13 01:37:07,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-13 01:37:08,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:08,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:37:08,331 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash -908236367, now seen corresponding path program 1 times [2021-11-13 01:37:08,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:08,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409713383] [2021-11-13 01:37:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:08,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:08,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:08,334 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:08,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 01:37:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:37:09,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 723 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-13 01:37:10,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2021-11-13 01:37:11,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:11,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409713383] [2021-11-13 01:37:11,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409713383] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:11,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:11,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:37:11,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578032091] [2021-11-13 01:37:11,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:11,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:37:11,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:37:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:11,507 INFO L87 Difference]: Start difference. First operand 43579 states and 67300 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 01:37:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:15,334 INFO L93 Difference]: Finished difference Result 85427 states and 133529 transitions. [2021-11-13 01:37:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:37:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 502 [2021-11-13 01:37:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:15,586 INFO L225 Difference]: With dead ends: 85427 [2021-11-13 01:37:15,586 INFO L226 Difference]: Without dead ends: 44633 [2021-11-13 01:37:16,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 999 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:37:16,064 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 101 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.54ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:16,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2142 Invalid, 160 Unknown, 0 Unchecked, 3.54ms Time], IncrementalHoareTripleChecker [14 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 160.60ms Time] [2021-11-13 01:37:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44633 states. [2021-11-13 01:37:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44633 to 44633. [2021-11-13 01:37:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44633 states, 33734 states have (on average 1.462441453726211) internal successors, (49334), 35247 states have internal predecessors, (49334), 7522 states have call successors, (7522), 3193 states have call predecessors, (7522), 3376 states have return successors, (11752), 7149 states have call predecessors, (11752), 7498 states have call successors, (11752) [2021-11-13 01:37:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44633 states to 44633 states and 68608 transitions. [2021-11-13 01:37:19,607 INFO L78 Accepts]: Start accepts. Automaton has 44633 states and 68608 transitions. Word has length 502 [2021-11-13 01:37:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:19,608 INFO L470 AbstractCegarLoop]: Abstraction has 44633 states and 68608 transitions. [2021-11-13 01:37:19,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 01:37:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 44633 states and 68608 transitions. [2021-11-13 01:37:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-13 01:37:19,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:19,635 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:19,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-13 01:37:19,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:19,836 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1766565955, now seen corresponding path program 1 times [2021-11-13 01:37:19,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:19,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604485570] [2021-11-13 01:37:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:19,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:19,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:19,840 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:19,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 01:37:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:20,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:37:20,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-11-13 01:37:21,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 54 proven. 25 refuted. 0 times theorem prover too weak. 1268 trivial. 0 not checked. [2021-11-13 01:37:23,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:23,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604485570] [2021-11-13 01:37:23,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604485570] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:23,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:23,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:37:23,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736991322] [2021-11-13 01:37:23,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:23,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:37:23,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:37:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:23,177 INFO L87 Difference]: Start difference. First operand 44633 states and 68608 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 01:37:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:26,884 INFO L93 Difference]: Finished difference Result 87867 states and 136735 transitions. [2021-11-13 01:37:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:37:26,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 507 [2021-11-13 01:37:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:27,090 INFO L225 Difference]: With dead ends: 87867 [2021-11-13 01:37:27,090 INFO L226 Difference]: Without dead ends: 46115 [2021-11-13 01:37:27,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:37:27,541 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 99 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.76ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:27,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 2155 Invalid, 164 Unknown, 0 Unchecked, 4.76ms Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 224.61ms Time] [2021-11-13 01:37:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46115 states. [2021-11-13 01:37:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46115 to 46115. [2021-11-13 01:37:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46115 states, 35134 states have (on average 1.4546023794614904) internal successors, (51106), 36647 states have internal predecessors, (51106), 7522 states have call successors, (7522), 3275 states have call predecessors, (7522), 3458 states have return successors, (11752), 7149 states have call predecessors, (11752), 7498 states have call successors, (11752) [2021-11-13 01:37:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46115 states to 46115 states and 70380 transitions. [2021-11-13 01:37:31,104 INFO L78 Accepts]: Start accepts. Automaton has 46115 states and 70380 transitions. Word has length 507 [2021-11-13 01:37:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:31,105 INFO L470 AbstractCegarLoop]: Abstraction has 46115 states and 70380 transitions. [2021-11-13 01:37:31,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-13 01:37:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 46115 states and 70380 transitions. [2021-11-13 01:37:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-13 01:37:31,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:37:31,132 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 12, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:31,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:31,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:37:31,334 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:37:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:37:31,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1071770063, now seen corresponding path program 1 times [2021-11-13 01:37:31,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:37:31,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415017755] [2021-11-13 01:37:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:37:31,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:37:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:37:31,337 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:37:31,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07de2b1b-e0f6-4075-b433-05a83949e709/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 01:37:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:37:32,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:37:32,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:37:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 746 proven. 0 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2021-11-13 01:37:33,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 1271 trivial. 0 not checked. [2021-11-13 01:37:34,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:37:34,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415017755] [2021-11-13 01:37:34,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415017755] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:37:34,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:37:34,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:37:34,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096340180] [2021-11-13 01:37:34,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:37:34,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:37:34,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:37:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:37:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:37:34,234 INFO L87 Difference]: Start difference. First operand 46115 states and 70380 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41)