./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product22.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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/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 f0289d2bc768d77152556c65688d1c231999d9919b651d65a3b9e8da8ee9b3f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:21:27,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:21:27,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:21:27,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:21:27,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:21:27,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:21:27,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:21:27,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:21:27,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:21:27,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:21:27,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:21:27,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:21:27,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:21:27,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:21:27,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:21:27,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:21:27,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:21:27,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:21:27,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:21:27,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:21:27,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:21:27,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:21:27,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:21:27,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:21:27,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:21:27,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:21:27,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:21:27,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:21:27,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:21:27,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:21:27,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:21:27,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:21:27,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:21:27,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:21:27,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:21:27,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:21:27,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:21:27,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:21:27,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:21:27,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:21:27,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:21:27,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:21:27,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:21:27,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:21:27,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:21:27,861 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:21:27,862 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:21:27,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:21:27,862 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:21:27,862 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:21:27,865 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:21:27,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:21:27,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:21:27,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:21:27,867 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:21:27,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:21:27,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:21:27,868 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:21:27,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:21:27,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:21:27,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:21:27,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:21:27,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:21:27,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:21:27,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:21:27,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:21:27,877 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:21:27,877 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:21:27,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:21:27,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:21:27,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:21:27,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:21:27,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:21:27,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:27,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:21:27,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:21:27,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:21:27,879 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:21:27,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:21:27,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:21:27,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:21:27,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:21:27,880 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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0289d2bc768d77152556c65688d1c231999d9919b651d65a3b9e8da8ee9b3f9 [2021-11-12 22:21:28,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:21:28,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:21:28,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:21:28,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:21:28,217 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:21:28,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c [2021-11-12 22:21:28,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data/ad33c53bc/6d2753b18aa849b39e62e9bc3e400317/FLAG820a486d1 [2021-11-12 22:21:28,850 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:21:28,851 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c [2021-11-12 22:21:28,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data/ad33c53bc/6d2753b18aa849b39e62e9bc3e400317/FLAG820a486d1 [2021-11-12 22:21:29,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data/ad33c53bc/6d2753b18aa849b39e62e9bc3e400317 [2021-11-12 22:21:29,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:21:29,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:21:29,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:29,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:21:29,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:21:29,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:29" (1/1) ... [2021-11-12 22:21:29,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7228c456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:29, skipping insertion in model container [2021-11-12 22:21:29,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:29" (1/1) ... [2021-11-12 22:21:29,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:21:29,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:21:29,565 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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c[27271,27284] [2021-11-12 22:21:29,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:29,851 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:21:29,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39601c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:29, skipping insertion in model container [2021-11-12 22:21:29,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:29,852 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:21:29,854 INFO L158 Benchmark]: Toolchain (without parser) took 742.35ms. Allocated memory is still 107.0MB. Free memory was 67.1MB in the beginning and 67.8MB in the end (delta: -733.4kB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2021-11-12 22:21:29,856 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 107.0MB. Free memory is still 86.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:21:29,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 739.92ms. Allocated memory is still 107.0MB. Free memory was 66.9MB in the beginning and 67.8MB in the end (delta: -917.1kB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2021-11-12 22:21:29,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 107.0MB. Free memory is still 86.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 739.92ms. Allocated memory is still 107.0MB. Free memory was 66.9MB in the beginning and 67.8MB in the end (delta: -917.1kB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/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 f0289d2bc768d77152556c65688d1c231999d9919b651d65a3b9e8da8ee9b3f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:21:31,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:21:31,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:21:32,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:21:32,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:21:32,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:21:32,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:21:32,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:21:32,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:21:32,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:21:32,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:21:32,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:21:32,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:21:32,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:21:32,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:21:32,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:21:32,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:21:32,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:21:32,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:21:32,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:21:32,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:21:32,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:21:32,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:21:32,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:21:32,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:21:32,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:21:32,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:21:32,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:21:32,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:21:32,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:21:32,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:21:32,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:21:32,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:21:32,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:21:32,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:21:32,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:21:32,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:21:32,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:21:32,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:21:32,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:21:32,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:21:32,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:21:32,171 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:21:32,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:21:32,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:21:32,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:21:32,173 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:21:32,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:21:32,174 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:21:32,174 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:21:32,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:21:32,174 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:21:32,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:21:32,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:21:32,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:21:32,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:21:32,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:21:32,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:21:32,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:21:32,178 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:21:32,178 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:21:32,178 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:21:32,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:21:32,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:21:32,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:21:32,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:21:32,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:21:32,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:21:32,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:21:32,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:32,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:21:32,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:21:32,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:21:32,181 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:21:32,181 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:21:32,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:21:32,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:21:32,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:21:32,182 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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0289d2bc768d77152556c65688d1c231999d9919b651d65a3b9e8da8ee9b3f9 [2021-11-12 22:21:32,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:21:32,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:21:32,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:21:32,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:21:32,583 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:21:32,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c [2021-11-12 22:21:32,652 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data/222bc588a/02743e6c9ade48ce903641866fea74e5/FLAG6497cb667 [2021-11-12 22:21:33,255 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:21:33,257 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c [2021-11-12 22:21:33,290 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data/222bc588a/02743e6c9ade48ce903641866fea74e5/FLAG6497cb667 [2021-11-12 22:21:33,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/data/222bc588a/02743e6c9ade48ce903641866fea74e5 [2021-11-12 22:21:33,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:21:33,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:21:33,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:33,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:21:33,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:21:33,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:33" (1/1) ... [2021-11-12 22:21:33,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e1df1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:33, skipping insertion in model container [2021-11-12 22:21:33,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:21:33" (1/1) ... [2021-11-12 22:21:33,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:21:33,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:21:34,049 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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c[27271,27284] [2021-11-12 22:21:34,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:34,237 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:21:34,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:21:34,313 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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c[27271,27284] [2021-11-12 22:21:34,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:34,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:21:34,447 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_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/sv-benchmarks/c/product-lines/elevator_spec1_product22.cil.c[27271,27284] [2021-11-12 22:21:34,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:21:34,566 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:21:34,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34 WrapperNode [2021-11-12 22:21:34,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:21:34,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:21:34,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:21:34,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:21:34,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:21:34,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:21:34,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:21:34,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:21:34,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:21:34,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:21:34,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:21:34,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:21:34,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (1/1) ... [2021-11-12 22:21:34,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:21:34,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:21:34,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:21:34,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:21:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 22:21:34,884 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 22:21:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:21:34,885 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:21:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:21:34,885 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:21:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:21:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:21:34,886 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:21:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:21:34,886 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:21:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:21:34,886 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:21:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:21:34,887 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:21:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:21:34,887 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:21:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:21:34,887 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:21:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:21:34,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:21:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:21:34,888 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:21:34,889 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:21:34,889 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:21:34,889 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:21:34,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:21:34,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:21:34,889 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:21:34,890 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:21:34,890 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:21:34,890 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:21:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:21:34,891 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:21:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:21:34,891 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:21:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:21:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:21:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:21:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:21:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:21:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:21:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:21:34,893 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:21:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:21:34,893 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:21:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:21:34,893 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:21:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-12 22:21:34,894 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-12 22:21:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 22:21:34,896 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 22:21:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:21:34,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:21:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:21:34,897 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:21:38,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:21:38,868 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:21:38,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:38 BoogieIcfgContainer [2021-11-12 22:21:38,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:21:38,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:21:38,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:21:38,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:21:38,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:21:33" (1/3) ... [2021-11-12 22:21:38,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30eabd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:21:38, skipping insertion in model container [2021-11-12 22:21:38,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:21:34" (2/3) ... [2021-11-12 22:21:38,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30eabd68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:21:38, skipping insertion in model container [2021-11-12 22:21:38,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:21:38" (3/3) ... [2021-11-12 22:21:38,879 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product22.cil.c [2021-11-12 22:21:38,884 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:21:38,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:21:38,933 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:21:38,940 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:21:38,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:21:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 579 states, 450 states have (on average 1.6866666666666668) internal successors, (759), 473 states have internal predecessors, (759), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2021-11-12 22:21:39,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:21:39,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:39,001 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:39,002 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1153428289, now seen corresponding path program 1 times [2021-11-12 22:21:39,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:39,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625722339] [2021-11-12 22:21:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:39,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:39,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:39,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:21:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:39,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:21:39,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:21:39,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:21:40,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:40,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625722339] [2021-11-12 22:21:40,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625722339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:40,132 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:40,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:21:40,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068533420] [2021-11-12 22:21:40,134 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:40,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:21:40,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:21:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:21:40,167 INFO L87 Difference]: Start difference. First operand has 579 states, 450 states have (on average 1.6866666666666668) internal successors, (759), 473 states have internal predecessors, (759), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 22:21:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:40,259 INFO L93 Difference]: Finished difference Result 600 states and 991 transitions. [2021-11-12 22:21:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:21:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-11-12 22:21:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:40,300 INFO L225 Difference]: With dead ends: 600 [2021-11-12 22:21:40,300 INFO L226 Difference]: Without dead ends: 571 [2021-11-12 22:21:40,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:21:40,307 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:40,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 10.44ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:21:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-12 22:21:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-12 22:21:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 444 states have (on average 1.6846846846846846) internal successors, (748), 465 states have internal predecessors, (748), 101 states have call successors, (101), 26 states have call predecessors, (101), 25 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 945 transitions. [2021-11-12 22:21:40,406 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 945 transitions. Word has length 83 [2021-11-12 22:21:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:40,408 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 945 transitions. [2021-11-12 22:21:40,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 22:21:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 945 transitions. [2021-11-12 22:21:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 22:21:40,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:40,415 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:40,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:40,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:40,640 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:40,641 INFO L85 PathProgramCache]: Analyzing trace with hash 833216110, now seen corresponding path program 1 times [2021-11-12 22:21:40,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:40,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738819446] [2021-11-12 22:21:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:40,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:40,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:40,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:21:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:41,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:21:41,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:21:41,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:41,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738819446] [2021-11-12 22:21:41,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738819446] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:41,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:41,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:41,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297564473] [2021-11-12 22:21:41,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:41,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:41,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:41,776 INFO L87 Difference]: Start difference. First operand 571 states and 945 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:41,914 INFO L93 Difference]: Finished difference Result 1133 states and 1882 transitions. [2021-11-12 22:21:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-12 22:21:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:41,924 INFO L225 Difference]: With dead ends: 1133 [2021-11-12 22:21:41,925 INFO L226 Difference]: Without dead ends: 571 [2021-11-12 22:21:41,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:41,935 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 14 mSDsluCounter, 1855 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2786 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.98ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:41,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2786 Invalid, 35 Unknown, 0 Unchecked, 17.98ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 42.67ms Time] [2021-11-12 22:21:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-12 22:21:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-12 22:21:41,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 444 states have (on average 1.6824324324324325) internal successors, (747), 465 states have internal predecessors, (747), 101 states have call successors, (101), 26 states have call predecessors, (101), 25 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 944 transitions. [2021-11-12 22:21:42,001 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 944 transitions. Word has length 85 [2021-11-12 22:21:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:42,003 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 944 transitions. [2021-11-12 22:21:42,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 944 transitions. [2021-11-12 22:21:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:21:42,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:42,011 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:42,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:21:42,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:42,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:42,229 INFO L85 PathProgramCache]: Analyzing trace with hash -108590114, now seen corresponding path program 1 times [2021-11-12 22:21:42,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:42,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175753762] [2021-11-12 22:21:42,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:42,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:42,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:42,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:42,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:21:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:42,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:42,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:21:43,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:21:43,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:43,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175753762] [2021-11-12 22:21:43,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175753762] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:43,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:43,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:43,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135675959] [2021-11-12 22:21:43,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:43,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:43,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:43,292 INFO L87 Difference]: Start difference. First operand 571 states and 944 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:43,404 INFO L93 Difference]: Finished difference Result 1133 states and 1880 transitions. [2021-11-12 22:21:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-11-12 22:21:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:43,414 INFO L225 Difference]: With dead ends: 1133 [2021-11-12 22:21:43,414 INFO L226 Difference]: Without dead ends: 571 [2021-11-12 22:21:43,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:43,421 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 12 mSDsluCounter, 1855 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2786 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:43,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2786 Invalid, 33 Unknown, 0 Unchecked, 29.97ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 33.52ms Time] [2021-11-12 22:21:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-12 22:21:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-12 22:21:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 444 states have (on average 1.6801801801801801) internal successors, (746), 465 states have internal predecessors, (746), 101 states have call successors, (101), 26 states have call predecessors, (101), 25 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 943 transitions. [2021-11-12 22:21:43,473 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 943 transitions. Word has length 87 [2021-11-12 22:21:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:43,474 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 943 transitions. [2021-11-12 22:21:43,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 943 transitions. [2021-11-12 22:21:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:21:43,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:43,479 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:43,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:43,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:43,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash -846790546, now seen corresponding path program 1 times [2021-11-12 22:21:43,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:43,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091459161] [2021-11-12 22:21:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:43,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:43,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:43,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:21:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:44,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:21:44,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:21:44,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:44,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091459161] [2021-11-12 22:21:44,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091459161] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:44,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:44,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:44,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553352189] [2021-11-12 22:21:44,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:44,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:44,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:44,630 INFO L87 Difference]: Start difference. First operand 571 states and 943 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:44,712 INFO L93 Difference]: Finished difference Result 1137 states and 1883 transitions. [2021-11-12 22:21:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:44,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-11-12 22:21:44,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:44,719 INFO L225 Difference]: With dead ends: 1137 [2021-11-12 22:21:44,719 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 22:21:44,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:44,724 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 13 mSDsluCounter, 1855 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2786 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:44,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2786 Invalid, 35 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 36.36ms Time] [2021-11-12 22:21:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 22:21:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-12 22:21:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.6726057906458798) internal successors, (751), 470 states have internal predecessors, (751), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 948 transitions. [2021-11-12 22:21:44,754 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 948 transitions. Word has length 89 [2021-11-12 22:21:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:44,754 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 948 transitions. [2021-11-12 22:21:44,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 948 transitions. [2021-11-12 22:21:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:21:44,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:44,757 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:44,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:44,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:44,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 84274444, now seen corresponding path program 1 times [2021-11-12 22:21:44,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:44,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984819666] [2021-11-12 22:21:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:44,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:44,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:44,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:45,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:21:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:45,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:45,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:21:45,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:21:46,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:46,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984819666] [2021-11-12 22:21:46,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984819666] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:46,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:46,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:46,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861799239] [2021-11-12 22:21:46,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:46,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:46,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:46,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:46,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:46,054 INFO L87 Difference]: Start difference. First operand 577 states and 948 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:46,133 INFO L93 Difference]: Finished difference Result 1136 states and 1874 transitions. [2021-11-12 22:21:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-11-12 22:21:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:46,141 INFO L225 Difference]: With dead ends: 1136 [2021-11-12 22:21:46,141 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 22:21:46,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:46,147 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 8 mSDsluCounter, 1855 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.66ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:46,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2787 Invalid, 30 Unknown, 0 Unchecked, 7.66ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 32.33ms Time] [2021-11-12 22:21:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 22:21:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-12 22:21:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.670378619153675) internal successors, (750), 470 states have internal predecessors, (750), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 947 transitions. [2021-11-12 22:21:46,176 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 947 transitions. Word has length 90 [2021-11-12 22:21:46,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:46,180 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 947 transitions. [2021-11-12 22:21:46,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 947 transitions. [2021-11-12 22:21:46,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 22:21:46,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:46,183 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:46,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:46,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:46,404 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1944240334, now seen corresponding path program 1 times [2021-11-12 22:21:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:46,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868302054] [2021-11-12 22:21:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:46,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:46,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:46,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:46,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:21:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:46,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:21:47,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:21:47,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:47,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868302054] [2021-11-12 22:21:47,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868302054] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:47,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:47,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:47,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279257555] [2021-11-12 22:21:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:47,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:47,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:47,483 INFO L87 Difference]: Start difference. First operand 577 states and 947 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:47,572 INFO L93 Difference]: Finished difference Result 1136 states and 1873 transitions. [2021-11-12 22:21:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2021-11-12 22:21:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:47,579 INFO L225 Difference]: With dead ends: 1136 [2021-11-12 22:21:47,579 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 22:21:47,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:47,584 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 6 mSDsluCounter, 1855 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:47,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2787 Invalid, 28 Unknown, 0 Unchecked, 6.28ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 46.14ms Time] [2021-11-12 22:21:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 22:21:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-12 22:21:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.6681514476614698) internal successors, (749), 470 states have internal predecessors, (749), 101 states have call successors, (101), 27 states have call predecessors, (101), 26 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 946 transitions. [2021-11-12 22:21:47,610 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 946 transitions. Word has length 91 [2021-11-12 22:21:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:47,611 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 946 transitions. [2021-11-12 22:21:47,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:47,611 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 946 transitions. [2021-11-12 22:21:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:21:47,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:47,613 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:47,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:47,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:47,834 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1230447408, now seen corresponding path program 1 times [2021-11-12 22:21:47,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:47,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856019087] [2021-11-12 22:21:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:47,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:47,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:47,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:47,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:21:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:21:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:48,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:21:48,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:48,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856019087] [2021-11-12 22:21:48,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856019087] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:48,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:48,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:21:48,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621030285] [2021-11-12 22:21:48,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:48,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:21:48,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:21:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:21:48,944 INFO L87 Difference]: Start difference. First operand 577 states and 946 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:21:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:49,156 INFO L93 Difference]: Finished difference Result 1153 states and 1901 transitions. [2021-11-12 22:21:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:21:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2021-11-12 22:21:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:49,164 INFO L225 Difference]: With dead ends: 1153 [2021-11-12 22:21:49,165 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 22:21:49,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:21:49,169 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 148 mSDsluCounter, 4543 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5473 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5473 Invalid, 85 Unknown, 0 Unchecked, 11.71ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 149.70ms Time] [2021-11-12 22:21:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 22:21:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 596. [2021-11-12 22:21:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 465 states have (on average 1.6666666666666667) internal successors, (775), 488 states have internal predecessors, (775), 102 states have call successors, (102), 27 states have call predecessors, (102), 28 states have return successors, (100), 94 states have call predecessors, (100), 97 states have call successors, (100) [2021-11-12 22:21:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 977 transitions. [2021-11-12 22:21:49,200 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 977 transitions. Word has length 92 [2021-11-12 22:21:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:49,200 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 977 transitions. [2021-11-12 22:21:49,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:21:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 977 transitions. [2021-11-12 22:21:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:21:49,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:49,203 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:49,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:49,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:49,427 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -363395183, now seen corresponding path program 1 times [2021-11-12 22:21:49,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:49,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924795679] [2021-11-12 22:21:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:49,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:49,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:49,430 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:49,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:21:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:21:50,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:21:50,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:50,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924795679] [2021-11-12 22:21:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924795679] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:50,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:50,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 22:21:50,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893242223] [2021-11-12 22:21:50,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:50,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:50,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:50,422 INFO L87 Difference]: Start difference. First operand 596 states and 977 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:50,500 INFO L93 Difference]: Finished difference Result 1166 states and 1923 transitions. [2021-11-12 22:21:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:50,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2021-11-12 22:21:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:50,506 INFO L225 Difference]: With dead ends: 1166 [2021-11-12 22:21:50,506 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 22:21:50,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:50,510 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 8 mSDsluCounter, 1855 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2786 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.53ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:50,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2786 Invalid, 30 Unknown, 0 Unchecked, 5.53ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 36.64ms Time] [2021-11-12 22:21:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 22:21:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 22:21:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 463 states have (on average 1.6673866090712743) internal successors, (772), 485 states have internal predecessors, (772), 101 states have call successors, (101), 27 states have call predecessors, (101), 27 states have return successors, (97), 93 states have call predecessors, (97), 96 states have call successors, (97) [2021-11-12 22:21:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 970 transitions. [2021-11-12 22:21:50,536 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 970 transitions. Word has length 92 [2021-11-12 22:21:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:50,537 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 970 transitions. [2021-11-12 22:21:50,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 970 transitions. [2021-11-12 22:21:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 22:21:50,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:50,542 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:50,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:50,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:50,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash -15773311, now seen corresponding path program 1 times [2021-11-12 22:21:50,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:50,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842354890] [2021-11-12 22:21:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:50,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:50,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:50,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:21:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:51,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:51,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:21:51,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:51,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842354890] [2021-11-12 22:21:51,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842354890] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:51,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:51,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:51,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493864093] [2021-11-12 22:21:51,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:51,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:51,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:51,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:51,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:51,680 INFO L87 Difference]: Start difference. First operand 592 states and 970 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:51,878 INFO L93 Difference]: Finished difference Result 1192 states and 1968 transitions. [2021-11-12 22:21:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-11-12 22:21:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:51,885 INFO L225 Difference]: With dead ends: 1192 [2021-11-12 22:21:51,885 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 22:21:51,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:51,889 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 134 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.58ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:51,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2594 Invalid, 131 Unknown, 0 Unchecked, 5.58ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 154.01ms Time] [2021-11-12 22:21:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 22:21:51,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 22:21:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 463 states have (on average 1.65658747300216) internal successors, (767), 485 states have internal predecessors, (767), 101 states have call successors, (101), 27 states have call predecessors, (101), 27 states have return successors, (97), 93 states have call predecessors, (97), 96 states have call successors, (97) [2021-11-12 22:21:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 965 transitions. [2021-11-12 22:21:51,915 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 965 transitions. Word has length 93 [2021-11-12 22:21:51,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:51,915 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 965 transitions. [2021-11-12 22:21:51,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 965 transitions. [2021-11-12 22:21:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 22:21:51,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:51,918 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:51,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:52,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:52,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 359169507, now seen corresponding path program 1 times [2021-11-12 22:21:52,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:52,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252580799] [2021-11-12 22:21:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:52,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:52,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:52,134 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:52,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:21:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:52,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:52,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:21:53,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:53,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252580799] [2021-11-12 22:21:53,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252580799] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:53,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:53,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:53,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456135533] [2021-11-12 22:21:53,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:53,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:53,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:53,149 INFO L87 Difference]: Start difference. First operand 592 states and 965 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:53,350 INFO L93 Difference]: Finished difference Result 1192 states and 1958 transitions. [2021-11-12 22:21:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:53,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2021-11-12 22:21:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:53,357 INFO L225 Difference]: With dead ends: 1192 [2021-11-12 22:21:53,357 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 22:21:53,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:53,361 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 128 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2594 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.69ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:53,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2594 Invalid, 121 Unknown, 0 Unchecked, 4.69ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 156.66ms Time] [2021-11-12 22:21:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 22:21:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 22:21:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 463 states have (on average 1.6457883369330453) internal successors, (762), 485 states have internal predecessors, (762), 101 states have call successors, (101), 27 states have call predecessors, (101), 27 states have return successors, (97), 93 states have call predecessors, (97), 96 states have call successors, (97) [2021-11-12 22:21:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 960 transitions. [2021-11-12 22:21:53,388 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 960 transitions. Word has length 95 [2021-11-12 22:21:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:53,389 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 960 transitions. [2021-11-12 22:21:53,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 960 transitions. [2021-11-12 22:21:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:21:53,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:53,391 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:53,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:53,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:53,608 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1436219295, now seen corresponding path program 1 times [2021-11-12 22:21:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:53,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485239556] [2021-11-12 22:21:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:53,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:53,610 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:53,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:21:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:54,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:54,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:21:54,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:54,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485239556] [2021-11-12 22:21:54,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485239556] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:54,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:54,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:54,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221912168] [2021-11-12 22:21:54,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:54,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:54,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:54,548 INFO L87 Difference]: Start difference. First operand 592 states and 960 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:54,767 INFO L93 Difference]: Finished difference Result 1213 states and 1979 transitions. [2021-11-12 22:21:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2021-11-12 22:21:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:54,774 INFO L225 Difference]: With dead ends: 1213 [2021-11-12 22:21:54,775 INFO L226 Difference]: Without dead ends: 622 [2021-11-12 22:21:54,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:54,780 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 143 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2604 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.78ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:54,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2604 Invalid, 131 Unknown, 0 Unchecked, 4.78ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 180.38ms Time] [2021-11-12 22:21:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-12 22:21:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 607. [2021-11-12 22:21:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 478 states have (on average 1.6255230125523012) internal successors, (777), 499 states have internal predecessors, (777), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 974 transitions. [2021-11-12 22:21:54,805 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 974 transitions. Word has length 97 [2021-11-12 22:21:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:54,805 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 974 transitions. [2021-11-12 22:21:54,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 974 transitions. [2021-11-12 22:21:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:21:54,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:54,808 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:54,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:55,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:55,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:55,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1560093727, now seen corresponding path program 1 times [2021-11-12 22:21:55,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:55,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845627405] [2021-11-12 22:21:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:55,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:55,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:55,039 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:55,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:21:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:55,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:21:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:55,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:21:56,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:56,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845627405] [2021-11-12 22:21:56,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845627405] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:56,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:56,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:21:56,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327210398] [2021-11-12 22:21:56,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:56,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:21:56,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:56,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:21:56,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:21:56,092 INFO L87 Difference]: Start difference. First operand 607 states and 974 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:21:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:56,256 INFO L93 Difference]: Finished difference Result 1177 states and 1900 transitions. [2021-11-12 22:21:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:21:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-11-12 22:21:56,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:56,263 INFO L225 Difference]: With dead ends: 1177 [2021-11-12 22:21:56,263 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 22:21:56,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:21:56,269 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 131 mSDsluCounter, 4508 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5441 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:56,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5441 Invalid, 75 Unknown, 0 Unchecked, 8.36ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 116.74ms Time] [2021-11-12 22:21:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 22:21:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 586. [2021-11-12 22:21:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 457 states have (on average 1.6192560175054704) internal successors, (740), 478 states have internal predecessors, (740), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 937 transitions. [2021-11-12 22:21:56,325 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 937 transitions. Word has length 97 [2021-11-12 22:21:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:56,326 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 937 transitions. [2021-11-12 22:21:56,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:21:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 937 transitions. [2021-11-12 22:21:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 22:21:56,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:56,329 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:56,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:56,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:56,544 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1721872365, now seen corresponding path program 1 times [2021-11-12 22:21:56,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:56,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423344116] [2021-11-12 22:21:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:56,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:56,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:56,546 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:56,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:21:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:57,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:57,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:21:57,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:57,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423344116] [2021-11-12 22:21:57,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423344116] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:57,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:57,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:57,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391634301] [2021-11-12 22:21:57,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:57,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:57,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:57,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:57,503 INFO L87 Difference]: Start difference. First operand 586 states and 937 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:57,617 INFO L93 Difference]: Finished difference Result 1141 states and 1838 transitions. [2021-11-12 22:21:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:57,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2021-11-12 22:21:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:57,624 INFO L225 Difference]: With dead ends: 1141 [2021-11-12 22:21:57,624 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 22:21:57,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:57,628 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 69 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2618 Invalid, 54 Unknown, 0 Unchecked, 4.27ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 83.07ms Time] [2021-11-12 22:21:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 22:21:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 22:21:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 457 states have (on average 1.6170678336980306) internal successors, (739), 478 states have internal predecessors, (739), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 936 transitions. [2021-11-12 22:21:57,652 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 936 transitions. Word has length 98 [2021-11-12 22:21:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:57,652 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 936 transitions. [2021-11-12 22:21:57,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 936 transitions. [2021-11-12 22:21:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 22:21:57,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:57,655 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:57,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:57,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:57,870 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:57,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1314643196, now seen corresponding path program 1 times [2021-11-12 22:21:57,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:57,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548513868] [2021-11-12 22:21:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:57,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:57,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:57,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:57,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:21:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:58,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:58,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:58,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:21:58,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:58,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548513868] [2021-11-12 22:21:58,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548513868] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:58,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:58,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:21:58,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066671992] [2021-11-12 22:21:58,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:58,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:21:58,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:21:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:58,845 INFO L87 Difference]: Start difference. First operand 586 states and 936 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:58,956 INFO L93 Difference]: Finished difference Result 1141 states and 1837 transitions. [2021-11-12 22:21:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-12 22:21:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:58,962 INFO L225 Difference]: With dead ends: 1141 [2021-11-12 22:21:58,962 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 22:21:58,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:58,966 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 67 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:58,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2618 Invalid, 52 Unknown, 0 Unchecked, 3.09ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 81.90ms Time] [2021-11-12 22:21:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 22:21:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 22:21:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 457 states have (on average 1.6148796498905909) internal successors, (738), 478 states have internal predecessors, (738), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:21:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 935 transitions. [2021-11-12 22:21:58,989 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 935 transitions. Word has length 99 [2021-11-12 22:21:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:58,990 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 935 transitions. [2021-11-12 22:21:58,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:21:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 935 transitions. [2021-11-12 22:21:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 22:21:58,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:58,993 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:21:59,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:59,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:59,208 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:59,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2051618024, now seen corresponding path program 1 times [2021-11-12 22:21:59,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:59,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453261923] [2021-11-12 22:21:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:59,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:59,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:59,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:59,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:21:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:59,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:21:59,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:21:59,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:00,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:00,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453261923] [2021-11-12 22:22:00,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453261923] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:00,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:00,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:22:00,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024774063] [2021-11-12 22:22:00,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:00,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:22:00,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:22:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:00,435 INFO L87 Difference]: Start difference. First operand 586 states and 935 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:22:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:00,671 INFO L93 Difference]: Finished difference Result 1146 states and 1844 transitions. [2021-11-12 22:22:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:22:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-12 22:22:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:00,678 INFO L225 Difference]: With dead ends: 1146 [2021-11-12 22:22:00,678 INFO L226 Difference]: Without dead ends: 597 [2021-11-12 22:22:00,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:22:00,682 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 109 mSDsluCounter, 5198 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6075 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.89ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.26ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:00,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6075 Invalid, 152 Unknown, 0 Unchecked, 5.89ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 158.26ms Time] [2021-11-12 22:22:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-12 22:22:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 588. [2021-11-12 22:22:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 459 states have (on average 1.6100217864923747) internal successors, (739), 480 states have internal predecessors, (739), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 936 transitions. [2021-11-12 22:22:00,703 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 936 transitions. Word has length 100 [2021-11-12 22:22:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:00,704 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 936 transitions. [2021-11-12 22:22:00,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:22:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 936 transitions. [2021-11-12 22:22:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:22:00,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:00,706 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:00,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:00,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:00,925 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1463326407, now seen corresponding path program 1 times [2021-11-12 22:22:00,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:00,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277013052] [2021-11-12 22:22:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:00,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:00,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:00,928 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:00,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:22:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:01,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:22:01,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:22:01,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:02,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:02,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277013052] [2021-11-12 22:22:02,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277013052] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:02,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:02,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:22:02,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006090404] [2021-11-12 22:22:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:22:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:22:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:02,029 INFO L87 Difference]: Start difference. First operand 588 states and 936 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:22:02,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:02,236 INFO L93 Difference]: Finished difference Result 1138 states and 1825 transitions. [2021-11-12 22:22:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:22:02,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-12 22:22:02,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:02,242 INFO L225 Difference]: With dead ends: 1138 [2021-11-12 22:22:02,242 INFO L226 Difference]: Without dead ends: 593 [2021-11-12 22:22:02,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:22:02,246 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 77 mSDsluCounter, 5204 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6083 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.15ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:02,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6083 Invalid, 152 Unknown, 0 Unchecked, 6.15ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 145.04ms Time] [2021-11-12 22:22:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-12 22:22:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 590. [2021-11-12 22:22:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 461 states have (on average 1.6052060737527114) internal successors, (740), 482 states have internal predecessors, (740), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 937 transitions. [2021-11-12 22:22:02,268 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 937 transitions. Word has length 101 [2021-11-12 22:22:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:02,268 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 937 transitions. [2021-11-12 22:22:02,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:22:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 937 transitions. [2021-11-12 22:22:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:22:02,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:02,271 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:02,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:02,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:02,484 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:02,485 INFO L85 PathProgramCache]: Analyzing trace with hash -874570606, now seen corresponding path program 1 times [2021-11-12 22:22:02,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:02,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640004211] [2021-11-12 22:22:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:02,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:02,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:02,486 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:02,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:22:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:22:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:03,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:03,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:03,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640004211] [2021-11-12 22:22:03,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640004211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:03,427 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:03,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:22:03,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71703382] [2021-11-12 22:22:03,428 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:03,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:22:03,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:22:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:22:03,429 INFO L87 Difference]: Start difference. First operand 590 states and 937 transitions. Second operand has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:03,620 INFO L93 Difference]: Finished difference Result 1084 states and 1752 transitions. [2021-11-12 22:22:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:22:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-11-12 22:22:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:03,626 INFO L225 Difference]: With dead ends: 1084 [2021-11-12 22:22:03,626 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 22:22:03,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:22:03,630 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 55 mSDsluCounter, 6117 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 7008 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:03,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 7008 Invalid, 101 Unknown, 0 Unchecked, 7.10ms Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 142.49ms Time] [2021-11-12 22:22:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 22:22:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 22:22:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.6123348017621146) internal successors, (732), 475 states have internal predecessors, (732), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 929 transitions. [2021-11-12 22:22:03,650 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 929 transitions. Word has length 102 [2021-11-12 22:22:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:03,650 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 929 transitions. [2021-11-12 22:22:03,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 929 transitions. [2021-11-12 22:22:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:22:03,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:03,653 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:03,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:03,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:03,873 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash -227119991, now seen corresponding path program 1 times [2021-11-12 22:22:03,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:03,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49014043] [2021-11-12 22:22:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:03,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:03,875 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:03,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:22:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:04,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:22:04,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:04,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:04,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:04,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49014043] [2021-11-12 22:22:04,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49014043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:04,905 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:04,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:22:04,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499167857] [2021-11-12 22:22:04,906 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:04,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:22:04,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:22:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:22:04,907 INFO L87 Difference]: Start difference. First operand 583 states and 929 transitions. Second operand has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:05,082 INFO L93 Difference]: Finished difference Result 1089 states and 1766 transitions. [2021-11-12 22:22:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:22:05,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 103 [2021-11-12 22:22:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:05,088 INFO L225 Difference]: With dead ends: 1089 [2021-11-12 22:22:05,088 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 22:22:05,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:22:05,092 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 147 mSDsluCounter, 7000 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 7883 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:05,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 7883 Invalid, 111 Unknown, 0 Unchecked, 6.58ms Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 132.98ms Time] [2021-11-12 22:22:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 22:22:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-12 22:22:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 451 states have (on average 1.6119733924611974) internal successors, (727), 472 states have internal predecessors, (727), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 924 transitions. [2021-11-12 22:22:05,113 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 924 transitions. Word has length 103 [2021-11-12 22:22:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:05,113 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 924 transitions. [2021-11-12 22:22:05,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 924 transitions. [2021-11-12 22:22:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:22:05,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:05,116 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:05,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:05,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:05,336 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:05,336 INFO L85 PathProgramCache]: Analyzing trace with hash -404903671, now seen corresponding path program 1 times [2021-11-12 22:22:05,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:05,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292448727] [2021-11-12 22:22:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:05,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:05,338 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:05,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:22:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:22:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:05,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:06,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:06,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292448727] [2021-11-12 22:22:06,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292448727] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:06,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:06,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:22:06,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603309603] [2021-11-12 22:22:06,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:06,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:22:06,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:06,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:22:06,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:22:06,284 INFO L87 Difference]: Start difference. First operand 580 states and 924 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:22:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:06,413 INFO L93 Difference]: Finished difference Result 1086 states and 1761 transitions. [2021-11-12 22:22:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:22:06,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2021-11-12 22:22:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:06,419 INFO L225 Difference]: With dead ends: 1086 [2021-11-12 22:22:06,419 INFO L226 Difference]: Without dead ends: 572 [2021-11-12 22:22:06,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:22:06,423 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 176 mSDsluCounter, 3507 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 4389 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.80ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:06,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 4389 Invalid, 63 Unknown, 0 Unchecked, 5.80ms Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 85.60ms Time] [2021-11-12 22:22:06,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-12 22:22:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-12 22:22:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 443 states have (on average 1.6162528216704288) internal successors, (716), 464 states have internal predecessors, (716), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 913 transitions. [2021-11-12 22:22:06,443 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 913 transitions. Word has length 103 [2021-11-12 22:22:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:06,443 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 913 transitions. [2021-11-12 22:22:06,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:22:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 913 transitions. [2021-11-12 22:22:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:22:06,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:06,446 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:06,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:06,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:06,660 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1566864790, now seen corresponding path program 1 times [2021-11-12 22:22:06,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:06,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033644064] [2021-11-12 22:22:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:06,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:06,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:06,680 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:06,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:22:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:22:07,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:07,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:07,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:07,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033644064] [2021-11-12 22:22:07,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033644064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:07,704 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:07,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:22:07,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186777821] [2021-11-12 22:22:07,704 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:07,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:22:07,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:22:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:07,706 INFO L87 Difference]: Start difference. First operand 572 states and 913 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:07,928 INFO L93 Difference]: Finished difference Result 1072 states and 1739 transitions. [2021-11-12 22:22:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:22:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-11-12 22:22:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:07,934 INFO L225 Difference]: With dead ends: 1072 [2021-11-12 22:22:07,934 INFO L226 Difference]: Without dead ends: 572 [2021-11-12 22:22:07,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:22:07,938 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 68 mSDsluCounter, 7747 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 8625 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:07,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 8625 Invalid, 142 Unknown, 0 Unchecked, 8.83ms Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 161.23ms Time] [2021-11-12 22:22:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-12 22:22:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-12 22:22:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 443 states have (on average 1.6139954853273137) internal successors, (715), 464 states have internal predecessors, (715), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 912 transitions. [2021-11-12 22:22:07,957 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 912 transitions. Word has length 104 [2021-11-12 22:22:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:07,957 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 912 transitions. [2021-11-12 22:22:07,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 912 transitions. [2021-11-12 22:22:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 22:22:07,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:07,960 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:07,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:08,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:08,176 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1302977191, now seen corresponding path program 1 times [2021-11-12 22:22:08,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:08,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356421379] [2021-11-12 22:22:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:08,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:08,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:08,178 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:08,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:22:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:22:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:08,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:09,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:09,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356421379] [2021-11-12 22:22:09,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356421379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:09,278 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:09,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:22:09,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016555251] [2021-11-12 22:22:09,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:09,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:22:09,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:09,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:22:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:09,281 INFO L87 Difference]: Start difference. First operand 572 states and 912 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:09,515 INFO L93 Difference]: Finished difference Result 1116 states and 1796 transitions. [2021-11-12 22:22:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:22:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 105 [2021-11-12 22:22:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:09,520 INFO L225 Difference]: With dead ends: 1116 [2021-11-12 22:22:09,521 INFO L226 Difference]: Without dead ends: 569 [2021-11-12 22:22:09,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:22:09,524 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 171 mSDsluCounter, 6024 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6890 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.42ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:09,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6890 Invalid, 129 Unknown, 0 Unchecked, 7.42ms Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 153.27ms Time] [2021-11-12 22:22:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-12 22:22:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-12 22:22:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 440 states have (on average 1.606818181818182) internal successors, (707), 461 states have internal predecessors, (707), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 904 transitions. [2021-11-12 22:22:09,546 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 904 transitions. Word has length 105 [2021-11-12 22:22:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:09,547 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 904 transitions. [2021-11-12 22:22:09,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 904 transitions. [2021-11-12 22:22:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:22:09,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:09,549 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:09,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:09,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:09,769 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -531086981, now seen corresponding path program 1 times [2021-11-12 22:22:09,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:09,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340947774] [2021-11-12 22:22:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:09,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:09,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:09,772 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:09,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:22:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:22:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:10,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:10,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:10,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340947774] [2021-11-12 22:22:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340947774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:10,803 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:10,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:22:10,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607085415] [2021-11-12 22:22:10,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:10,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:22:10,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:22:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:10,805 INFO L87 Difference]: Start difference. First operand 569 states and 904 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:11,034 INFO L93 Difference]: Finished difference Result 1063 states and 1719 transitions. [2021-11-12 22:22:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:22:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 106 [2021-11-12 22:22:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:11,040 INFO L225 Difference]: With dead ends: 1063 [2021-11-12 22:22:11,040 INFO L226 Difference]: Without dead ends: 569 [2021-11-12 22:22:11,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:22:11,043 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 81 mSDsluCounter, 7753 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 8620 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:11,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 8620 Invalid, 166 Unknown, 0 Unchecked, 8.51ms Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 167.41ms Time] [2021-11-12 22:22:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-12 22:22:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-12 22:22:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 440 states have (on average 1.6045454545454545) internal successors, (706), 461 states have internal predecessors, (706), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 903 transitions. [2021-11-12 22:22:11,062 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 903 transitions. Word has length 106 [2021-11-12 22:22:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:11,062 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 903 transitions. [2021-11-12 22:22:11,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 903 transitions. [2021-11-12 22:22:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 22:22:11,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:11,065 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:11,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:11,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:11,283 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1888370776, now seen corresponding path program 1 times [2021-11-12 22:22:11,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:11,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668287742] [2021-11-12 22:22:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:11,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:11,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:11,285 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:11,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:22:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:11,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:22:11,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:11,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:22:12,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:12,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668287742] [2021-11-12 22:22:12,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668287742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:12,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:12,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:22:12,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134725895] [2021-11-12 22:22:12,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:12,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:22:12,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:22:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:12,384 INFO L87 Difference]: Start difference. First operand 569 states and 903 transitions. Second operand has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:12,550 INFO L93 Difference]: Finished difference Result 1101 states and 1764 transitions. [2021-11-12 22:22:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:22:12,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 107 [2021-11-12 22:22:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:12,555 INFO L225 Difference]: With dead ends: 1101 [2021-11-12 22:22:12,556 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 22:22:12,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:22:12,559 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 120 mSDsluCounter, 4291 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 5156 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:12,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 5156 Invalid, 96 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 92.23ms Time] [2021-11-12 22:22:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 22:22:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 22:22:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 437 states have (on average 1.597254004576659) internal successors, (698), 458 states have internal predecessors, (698), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (96), 93 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:22:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 895 transitions. [2021-11-12 22:22:12,577 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 895 transitions. Word has length 107 [2021-11-12 22:22:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:12,578 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 895 transitions. [2021-11-12 22:22:12,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:22:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 895 transitions. [2021-11-12 22:22:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 22:22:12,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:12,581 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:12,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:12,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:12,801 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:12,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1506216928, now seen corresponding path program 1 times [2021-11-12 22:22:12,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:12,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134960535] [2021-11-12 22:22:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:12,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:12,803 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:12,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:22:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:13,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:22:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:13,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:14,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:14,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134960535] [2021-11-12 22:22:14,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134960535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:14,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:14,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 22:22:14,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4360850] [2021-11-12 22:22:14,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:14,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:22:14,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:22:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:22:14,376 INFO L87 Difference]: Start difference. First operand 566 states and 895 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 22:22:16,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:18,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:25,928 INFO L93 Difference]: Finished difference Result 2728 states and 4518 transitions. [2021-11-12 22:22:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:22:25,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 108 [2021-11-12 22:22:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:25,939 INFO L225 Difference]: With dead ends: 2728 [2021-11-12 22:22:25,939 INFO L226 Difference]: Without dead ends: 2242 [2021-11-12 22:22:25,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:22:25,943 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 6141 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 4423 mSolverCounterSat, 1583 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10246.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6323 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 6008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.46ms SdHoareTripleChecker+Time, 1583 IncrementalHoareTripleChecker+Valid, 4423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11243.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:25,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6323 Valid, 3177 Invalid, 6008 Unknown, 0 Unchecked, 40.46ms Time], IncrementalHoareTripleChecker [1583 Valid, 4423 Invalid, 2 Unknown, 0 Unchecked, 11243.63ms Time] [2021-11-12 22:22:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-11-12 22:22:26,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2060. [2021-11-12 22:22:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 1581 states have (on average 1.65528146742568) internal successors, (2617), 1646 states have internal predecessors, (2617), 394 states have call successors, (394), 81 states have call predecessors, (394), 84 states have return successors, (402), 359 states have call predecessors, (402), 389 states have call successors, (402) [2021-11-12 22:22:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 3413 transitions. [2021-11-12 22:22:26,067 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 3413 transitions. Word has length 108 [2021-11-12 22:22:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:26,067 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 3413 transitions. [2021-11-12 22:22:26,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 22:22:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 3413 transitions. [2021-11-12 22:22:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:22:26,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:26,076 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:26,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:26,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:26,296 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1428606000, now seen corresponding path program 1 times [2021-11-12 22:22:26,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:26,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338702156] [2021-11-12 22:22:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:26,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:26,298 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:26,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:22:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:26,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:22:26,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:27,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:28,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:28,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338702156] [2021-11-12 22:22:28,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338702156] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:28,492 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:28,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 22:22:28,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131881713] [2021-11-12 22:22:28,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:28,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:22:28,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:28,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:22:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:22:28,494 INFO L87 Difference]: Start difference. First operand 2060 states and 3413 transitions. Second operand has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 12 states have internal predecessors, (185), 8 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-12 22:22:30,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:32,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:34,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:36,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:39,741 INFO L93 Difference]: Finished difference Result 4577 states and 7739 transitions. [2021-11-12 22:22:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:22:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 12 states have internal predecessors, (185), 8 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) Word has length 147 [2021-11-12 22:22:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:39,756 INFO L225 Difference]: With dead ends: 4577 [2021-11-12 22:22:39,756 INFO L226 Difference]: Without dead ends: 2597 [2021-11-12 22:22:39,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:22:39,768 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 1504 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 3414 mSolverCounterSat, 615 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10608.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 4033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.27ms SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 3414 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11069.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:39,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 2858 Invalid, 4033 Unknown, 0 Unchecked, 15.27ms Time], IncrementalHoareTripleChecker [615 Valid, 3414 Invalid, 4 Unknown, 0 Unchecked, 11069.57ms Time] [2021-11-12 22:22:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-11-12 22:22:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2076. [2021-11-12 22:22:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 1593 states have (on average 1.650345260514752) internal successors, (2629), 1658 states have internal predecessors, (2629), 394 states have call successors, (394), 81 states have call predecessors, (394), 88 states have return successors, (466), 363 states have call predecessors, (466), 389 states have call successors, (466) [2021-11-12 22:22:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3489 transitions. [2021-11-12 22:22:39,896 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3489 transitions. Word has length 147 [2021-11-12 22:22:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:39,897 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 3489 transitions. [2021-11-12 22:22:39,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 12 states have internal predecessors, (185), 8 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (30), 10 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-12 22:22:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3489 transitions. [2021-11-12 22:22:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 22:22:39,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:39,904 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:39,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:40,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:40,120 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1218545946, now seen corresponding path program 1 times [2021-11-12 22:22:40,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:40,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576980634] [2021-11-12 22:22:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:40,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:40,121 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:40,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:22:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:40,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:22:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:41,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:41,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:41,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576980634] [2021-11-12 22:22:41,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576980634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:41,641 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:41,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:22:41,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602387533] [2021-11-12 22:22:41,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:41,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:22:41,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:22:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:22:41,644 INFO L87 Difference]: Start difference. First operand 2076 states and 3489 transitions. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 22:22:43,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:45,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:53,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:53,771 INFO L93 Difference]: Finished difference Result 5483 states and 9314 transitions. [2021-11-12 22:22:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 22:22:53,773 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) Word has length 147 [2021-11-12 22:22:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:53,817 INFO L225 Difference]: With dead ends: 5483 [2021-11-12 22:22:53,817 INFO L226 Difference]: Without dead ends: 3487 [2021-11-12 22:22:53,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:22:53,830 INFO L933 BasicCegarLoop]: 1816 mSDtfsCounter, 2910 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 8455 mSolverCounterSat, 1030 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10629.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3000 SdHoareTripleChecker+Valid, 5600 SdHoareTripleChecker+Invalid, 9487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.51ms SdHoareTripleChecker+Time, 1030 IncrementalHoareTripleChecker+Valid, 8455 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11583.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:53,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3000 Valid, 5600 Invalid, 9487 Unknown, 0 Unchecked, 40.51ms Time], IncrementalHoareTripleChecker [1030 Valid, 8455 Invalid, 2 Unknown, 0 Unchecked, 11583.89ms Time] [2021-11-12 22:22:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2021-11-12 22:22:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 3013. [2021-11-12 22:22:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 2262 states have (on average 1.6162687886825817) internal successors, (3656), 2353 states have internal predecessors, (3656), 616 states have call successors, (616), 112 states have call predecessors, (616), 134 states have return successors, (718), 580 states have call predecessors, (718), 611 states have call successors, (718) [2021-11-12 22:22:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 4990 transitions. [2021-11-12 22:22:54,039 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 4990 transitions. Word has length 147 [2021-11-12 22:22:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:54,039 INFO L470 AbstractCegarLoop]: Abstraction has 3013 states and 4990 transitions. [2021-11-12 22:22:54,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 7 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 22:22:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 4990 transitions. [2021-11-12 22:22:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 22:22:54,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:54,045 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:22:54,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:54,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:54,268 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash 218033200, now seen corresponding path program 1 times [2021-11-12 22:22:54,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:54,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478339752] [2021-11-12 22:22:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:54,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:54,270 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:54,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:22:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:22:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:55,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:22:55,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:55,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478339752] [2021-11-12 22:22:55,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478339752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:22:55,762 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:22:55,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 22:22:55,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030015553] [2021-11-12 22:22:55,763 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:55,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:22:55,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:55,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:22:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:22:55,764 INFO L87 Difference]: Start difference. First operand 3013 states and 4990 transitions. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 22:22:57,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:59,790 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:04,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:04,505 INFO L93 Difference]: Finished difference Result 9838 states and 16793 transitions. [2021-11-12 22:23:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:23:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 148 [2021-11-12 22:23:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:04,549 INFO L225 Difference]: With dead ends: 9838 [2021-11-12 22:23:04,549 INFO L226 Difference]: Without dead ends: 6905 [2021-11-12 22:23:04,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:23:04,568 INFO L933 BasicCegarLoop]: 1444 mSDtfsCounter, 5488 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 3607 mSolverCounterSat, 1596 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7648.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5574 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 5205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.20ms SdHoareTripleChecker+Time, 1596 IncrementalHoareTripleChecker+Valid, 3607 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8265.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:04,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5574 Valid, 2814 Invalid, 5205 Unknown, 0 Unchecked, 22.20ms Time], IncrementalHoareTripleChecker [1596 Valid, 3607 Invalid, 2 Unknown, 0 Unchecked, 8265.25ms Time] [2021-11-12 22:23:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6905 states. [2021-11-12 22:23:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6905 to 6563. [2021-11-12 22:23:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6563 states, 4934 states have (on average 1.6139035265504662) internal successors, (7963), 5152 states have internal predecessors, (7963), 1320 states have call successors, (1320), 272 states have call predecessors, (1320), 308 states have return successors, (1530), 1215 states have call predecessors, (1530), 1315 states have call successors, (1530) [2021-11-12 22:23:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6563 states to 6563 states and 10813 transitions. [2021-11-12 22:23:05,034 INFO L78 Accepts]: Start accepts. Automaton has 6563 states and 10813 transitions. Word has length 148 [2021-11-12 22:23:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:05,036 INFO L470 AbstractCegarLoop]: Abstraction has 6563 states and 10813 transitions. [2021-11-12 22:23:05,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-12 22:23:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 6563 states and 10813 transitions. [2021-11-12 22:23:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 22:23:05,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:05,041 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:05,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:05,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:05,264 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:05,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1378767602, now seen corresponding path program 1 times [2021-11-12 22:23:05,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:05,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452473132] [2021-11-12 22:23:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:05,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:05,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:05,266 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:05,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:23:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:05,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:23:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:23:08,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:23:12,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:12,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452473132] [2021-11-12 22:23:12,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452473132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:12,578 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:12,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-11-12 22:23:12,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909594395] [2021-11-12 22:23:12,579 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:12,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:23:12,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:23:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:23:12,580 INFO L87 Difference]: Start difference. First operand 6563 states and 10813 transitions. Second operand has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 9 states have call successors, (33), 7 states have call predecessors, (33), 6 states have return successors, (32), 9 states have call predecessors, (32), 8 states have call successors, (32) [2021-11-12 22:23:14,610 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:16,616 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:18,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:27,580 INFO L93 Difference]: Finished difference Result 16268 states and 26998 transitions. [2021-11-12 22:23:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:23:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 9 states have call successors, (33), 7 states have call predecessors, (33), 6 states have return successors, (32), 9 states have call predecessors, (32), 8 states have call successors, (32) Word has length 150 [2021-11-12 22:23:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:27,636 INFO L225 Difference]: With dead ends: 16268 [2021-11-12 22:23:27,636 INFO L226 Difference]: Without dead ends: 9785 [2021-11-12 22:23:27,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:23:27,696 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 4210 mSDsluCounter, 2338 mSDsCounter, 0 mSdLazyCounter, 7396 mSolverCounterSat, 1244 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12803.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4287 SdHoareTripleChecker+Valid, 3894 SdHoareTripleChecker+Invalid, 8643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.42ms SdHoareTripleChecker+Time, 1244 IncrementalHoareTripleChecker+Valid, 7396 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13934.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:27,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4287 Valid, 3894 Invalid, 8643 Unknown, 0 Unchecked, 32.42ms Time], IncrementalHoareTripleChecker [1244 Valid, 7396 Invalid, 3 Unknown, 0 Unchecked, 13934.68ms Time] [2021-11-12 22:23:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9785 states. [2021-11-12 22:23:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9785 to 9247. [2021-11-12 22:23:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9247 states, 6870 states have (on average 1.6074235807860262) internal successors, (11043), 7202 states have internal predecessors, (11043), 1945 states have call successors, (1945), 381 states have call predecessors, (1945), 431 states have return successors, (2251), 1784 states have call predecessors, (2251), 1940 states have call successors, (2251) [2021-11-12 22:23:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9247 states to 9247 states and 15239 transitions. [2021-11-12 22:23:28,336 INFO L78 Accepts]: Start accepts. Automaton has 9247 states and 15239 transitions. Word has length 150 [2021-11-12 22:23:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:28,336 INFO L470 AbstractCegarLoop]: Abstraction has 9247 states and 15239 transitions. [2021-11-12 22:23:28,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.916666666666668) internal successors, (203), 12 states have internal predecessors, (203), 9 states have call successors, (33), 7 states have call predecessors, (33), 6 states have return successors, (32), 9 states have call predecessors, (32), 8 states have call successors, (32) [2021-11-12 22:23:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 9247 states and 15239 transitions. [2021-11-12 22:23:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 22:23:28,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:28,341 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:28,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:28,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:28,556 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash 14449859, now seen corresponding path program 1 times [2021-11-12 22:23:28,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:28,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466189951] [2021-11-12 22:23:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:28,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:28,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:28,559 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:28,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:23:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:23:29,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:23:29,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:23:30,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:30,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466189951] [2021-11-12 22:23:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466189951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:30,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:30,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 22:23:30,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797401799] [2021-11-12 22:23:30,611 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:30,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:23:30,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:23:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:23:30,612 INFO L87 Difference]: Start difference. First operand 9247 states and 15239 transitions. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (33), 6 states have call predecessors, (33), 7 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:23:32,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:34,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:43,384 INFO L93 Difference]: Finished difference Result 31404 states and 53349 transitions. [2021-11-12 22:23:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:23:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (33), 6 states have call predecessors, (33), 7 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 154 [2021-11-12 22:23:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:43,514 INFO L225 Difference]: With dead ends: 31404 [2021-11-12 22:23:43,514 INFO L226 Difference]: Without dead ends: 22195 [2021-11-12 22:23:43,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:23:43,561 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 5412 mSDsluCounter, 2208 mSDsCounter, 0 mSdLazyCounter, 6669 mSolverCounterSat, 2289 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10424.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5520 SdHoareTripleChecker+Valid, 3907 SdHoareTripleChecker+Invalid, 8960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.11ms SdHoareTripleChecker+Time, 2289 IncrementalHoareTripleChecker+Valid, 6669 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11376.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:43,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5520 Valid, 3907 Invalid, 8960 Unknown, 0 Unchecked, 33.11ms Time], IncrementalHoareTripleChecker [2289 Valid, 6669 Invalid, 2 Unknown, 0 Unchecked, 11376.63ms Time] [2021-11-12 22:23:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22195 states. [2021-11-12 22:23:45,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22195 to 17338. [2021-11-12 22:23:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17338 states, 12628 states have (on average 1.5901171998732975) internal successors, (20080), 13307 states have internal predecessors, (20080), 3897 states have call successors, (3897), 639 states have call predecessors, (3897), 812 states have return successors, (4639), 3688 states have call predecessors, (4639), 3892 states have call successors, (4639) [2021-11-12 22:23:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17338 states to 17338 states and 28616 transitions. [2021-11-12 22:23:45,268 INFO L78 Accepts]: Start accepts. Automaton has 17338 states and 28616 transitions. Word has length 154 [2021-11-12 22:23:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:45,269 INFO L470 AbstractCegarLoop]: Abstraction has 17338 states and 28616 transitions. [2021-11-12 22:23:45,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (33), 6 states have call predecessors, (33), 7 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:23:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 17338 states and 28616 transitions. [2021-11-12 22:23:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-12 22:23:45,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:45,274 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:23:45,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:45,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:45,496 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash 136276190, now seen corresponding path program 1 times [2021-11-12 22:23:45,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:45,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630172350] [2021-11-12 22:23:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:45,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:45,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:45,499 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:45,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:23:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:23:46,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:23:46,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:23:47,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:47,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630172350] [2021-11-12 22:23:47,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630172350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:47,092 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:47,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:23:47,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103074478] [2021-11-12 22:23:47,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:47,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:23:47,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:47,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:23:47,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:23:47,093 INFO L87 Difference]: Start difference. First operand 17338 states and 28616 transitions. Second operand has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:23:49,115 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:51,120 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:53,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:59,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:59,251 INFO L93 Difference]: Finished difference Result 57647 states and 97519 transitions. [2021-11-12 22:23:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:23:59,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 155 [2021-11-12 22:23:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:59,523 INFO L225 Difference]: With dead ends: 57647 [2021-11-12 22:23:59,523 INFO L226 Difference]: Without dead ends: 40392 [2021-11-12 22:23:59,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:23:59,623 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 2219 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 3310 mSolverCounterSat, 644 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9258.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2326 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.12ms SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 3310 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9769.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:59,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2326 Valid, 3139 Invalid, 3957 Unknown, 0 Unchecked, 17.12ms Time], IncrementalHoareTripleChecker [644 Valid, 3310 Invalid, 3 Unknown, 0 Unchecked, 9769.23ms Time] [2021-11-12 22:23:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40392 states. [2021-11-12 22:24:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40392 to 36692. [2021-11-12 22:24:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36692 states, 26245 states have (on average 1.5795008573061535) internal successors, (41454), 27767 states have internal predecessors, (41454), 8772 states have call successors, (8772), 1163 states have call predecessors, (8772), 1674 states have return successors, (10764), 8509 states have call predecessors, (10764), 8767 states have call successors, (10764) [2021-11-12 22:24:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36692 states to 36692 states and 60990 transitions. [2021-11-12 22:24:02,359 INFO L78 Accepts]: Start accepts. Automaton has 36692 states and 60990 transitions. Word has length 155 [2021-11-12 22:24:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:02,360 INFO L470 AbstractCegarLoop]: Abstraction has 36692 states and 60990 transitions. [2021-11-12 22:24:02,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.25) internal successors, (194), 8 states have internal predecessors, (194), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:24:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 36692 states and 60990 transitions. [2021-11-12 22:24:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:24:02,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:02,365 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:24:02,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:02,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:02,574 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash -504097562, now seen corresponding path program 1 times [2021-11-12 22:24:02,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:02,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285310578] [2021-11-12 22:24:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:02,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:02,576 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:02,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:24:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:24:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:24:03,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:24:04,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:04,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285310578] [2021-11-12 22:24:04,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285310578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:04,401 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:04,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:24:04,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789966295] [2021-11-12 22:24:04,401 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:04,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:24:04,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:24:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:24:04,403 INFO L87 Difference]: Start difference. First operand 36692 states and 60990 transitions. Second operand has 8 states, 8 states have (on average 24.375) internal successors, (195), 8 states have internal predecessors, (195), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:24:06,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:08,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:10,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:20,816 INFO L93 Difference]: Finished difference Result 132781 states and 226512 transitions. [2021-11-12 22:24:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:24:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.375) internal successors, (195), 8 states have internal predecessors, (195), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 156 [2021-11-12 22:24:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:21,484 INFO L225 Difference]: With dead ends: 132781 [2021-11-12 22:24:21,485 INFO L226 Difference]: Without dead ends: 96174 [2021-11-12 22:24:21,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:24:21,768 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 2889 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 3266 mSolverCounterSat, 852 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9237.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2997 SdHoareTripleChecker+Valid, 3057 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.62ms SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 3266 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9764.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:21,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2997 Valid, 3057 Invalid, 4121 Unknown, 0 Unchecked, 18.62ms Time], IncrementalHoareTripleChecker [852 Valid, 3266 Invalid, 3 Unknown, 0 Unchecked, 9764.29ms Time] [2021-11-12 22:24:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96174 states. [2021-11-12 22:24:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96174 to 85091. [2021-11-12 22:24:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85091 states, 59974 states have (on average 1.5731983859672525) internal successors, (94351), 63614 states have internal predecessors, (94351), 21343 states have call successors, (21343), 2211 states have call predecessors, (21343), 3773 states have return successors, (27097), 21190 states have call predecessors, (27097), 21338 states have call successors, (27097) [2021-11-12 22:24:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85091 states to 85091 states and 142791 transitions. [2021-11-12 22:24:28,948 INFO L78 Accepts]: Start accepts. Automaton has 85091 states and 142791 transitions. Word has length 156 [2021-11-12 22:24:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:28,948 INFO L470 AbstractCegarLoop]: Abstraction has 85091 states and 142791 transitions. [2021-11-12 22:24:28,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.375) internal successors, (195), 8 states have internal predecessors, (195), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:24:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 85091 states and 142791 transitions. [2021-11-12 22:24:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 22:24:28,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:28,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:28,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:29,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:29,168 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1911051997, now seen corresponding path program 1 times [2021-11-12 22:24:29,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:29,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087947720] [2021-11-12 22:24:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:29,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:29,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:29,171 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:29,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff2b7e84-100e-4b4a-a1e6-55bf164cbb6f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:24:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:29,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:24:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:24:30,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:24:30,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:30,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087947720] [2021-11-12 22:24:30,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087947720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:24:30,908 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:24:30,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:24:30,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979509219] [2021-11-12 22:24:30,909 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:30,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:24:30,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:30,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:24:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:24:30,910 INFO L87 Difference]: Start difference. First operand 85091 states and 142791 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 22:24:32,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:24:34,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []