./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_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_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/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_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/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_849b24dd-201b-4b3c-8b56-91127dbf7589/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 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:51:28,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:51:28,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:51:28,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:51:28,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:51:28,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:51:28,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:51:28,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:51:28,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:51:28,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:51:28,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:51:28,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:51:28,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:51:28,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:51:28,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:51:28,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:51:28,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:51:28,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:51:28,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:51:28,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:51:28,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:51:28,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:51:28,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:51:28,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:51:28,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:51:28,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:51:28,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:51:28,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:51:28,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:51:28,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:51:28,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:51:28,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:51:28,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:51:28,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:51:28,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:51:28,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:51:28,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:51:28,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:51:28,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:51:28,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:51:28,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:51:28,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:51:28,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:51:28,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:51:28,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:51:28,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:51:28,850 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:51:28,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:51:28,851 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:51:28,851 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:51:28,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:51:28,851 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:51:28,851 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:51:28,852 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:51:28,852 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:51:28,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:51:28,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:51:28,852 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:51:28,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:51:28,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:51:28,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:51:28,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:51:28,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:51:28,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:51:28,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:51:28,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:51:28,855 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:51:28,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:51:28,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:51:28,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:51:28,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:51:28,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:51:28,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:51:28,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:28,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:51:28,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:51:28,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:51:28,857 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:51:28,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:51:28,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:51:28,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:51:28,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:51:28,858 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_849b24dd-201b-4b3c-8b56-91127dbf7589/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2021-11-12 23:51:29,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:51:29,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:51:29,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:51:29,189 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:51:29,190 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:51:29,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-12 23:51:29,259 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data/e46502630/675a956032f54b4aba403befdb90ce02/FLAG1a7d3f625 [2021-11-12 23:51:29,890 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:51:29,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-12 23:51:29,924 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data/e46502630/675a956032f54b4aba403befdb90ce02/FLAG1a7d3f625 [2021-11-12 23:51:30,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data/e46502630/675a956032f54b4aba403befdb90ce02 [2021-11-12 23:51:30,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:51:30,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:51:30,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:30,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:51:30,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:51:30,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:30" (1/1) ... [2021-11-12 23:51:30,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b42a4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:30, skipping insertion in model container [2021-11-12 23:51:30,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:30" (1/1) ... [2021-11-12 23:51:30,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:51:30,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:30,499 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_849b24dd-201b-4b3c-8b56-91127dbf7589/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-12 23:51:30,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:30,875 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 23:51:30,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50c6920f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:30, skipping insertion in model container [2021-11-12 23:51:30,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:30,876 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:51:30,879 INFO L158 Benchmark]: Toolchain (without parser) took 753.27ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 58.5MB in the beginning and 79.1MB in the end (delta: -20.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:51:30,880 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 96.5MB. Free memory was 66.6MB in the beginning and 66.6MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:51:30,881 INFO L158 Benchmark]: CACSL2BoogieTranslator took 748.63ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 58.3MB in the beginning and 79.1MB in the end (delta: -20.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:51:30,883 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 96.5MB. Free memory was 66.6MB in the beginning and 66.6MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 748.63ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 58.3MB in the beginning and 79.1MB in the end (delta: -20.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 188]: 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_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/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_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/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_849b24dd-201b-4b3c-8b56-91127dbf7589/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 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:51:33,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:51:33,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:51:33,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:51:33,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:51:33,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:51:33,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:51:33,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:51:33,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:51:33,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:51:33,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:51:33,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:51:33,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:51:33,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:51:33,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:51:33,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:51:33,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:51:33,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:51:33,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:51:33,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:51:33,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:51:33,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:51:33,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:51:33,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:51:33,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:51:33,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:51:33,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:51:33,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:51:33,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:51:33,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:51:33,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:51:33,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:51:33,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:51:33,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:51:33,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:51:33,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:51:33,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:51:33,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:51:33,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:51:33,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:51:33,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:51:33,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:51:33,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:51:33,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:51:33,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:51:33,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:51:33,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:51:33,397 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:51:33,397 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:51:33,398 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:51:33,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:51:33,398 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:51:33,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:51:33,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:51:33,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:51:33,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:51:33,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:51:33,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:51:33,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:51:33,403 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:51:33,404 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:51:33,404 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:51:33,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:51:33,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:51:33,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:51:33,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:51:33,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:51:33,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:51:33,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:51:33,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:33,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:51:33,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:51:33,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:51:33,407 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:51:33,407 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:51:33,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:51:33,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:51:33,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:51:33,409 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_849b24dd-201b-4b3c-8b56-91127dbf7589/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2021-11-12 23:51:33,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:51:33,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:51:33,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:51:33,807 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:51:33,808 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:51:33,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-12 23:51:33,890 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data/b02ff7a1f/e6ed72f9efb54d9494ecbecf7b360542/FLAG88938fef7 [2021-11-12 23:51:34,626 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:51:34,627 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-12 23:51:34,655 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data/b02ff7a1f/e6ed72f9efb54d9494ecbecf7b360542/FLAG88938fef7 [2021-11-12 23:51:34,775 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/data/b02ff7a1f/e6ed72f9efb54d9494ecbecf7b360542 [2021-11-12 23:51:34,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:51:34,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:51:34,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:34,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:51:34,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:51:34,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:34" (1/1) ... [2021-11-12 23:51:34,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635209e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:34, skipping insertion in model container [2021-11-12 23:51:34,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:51:34" (1/1) ... [2021-11-12 23:51:34,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:51:34,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:35,114 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_849b24dd-201b-4b3c-8b56-91127dbf7589/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-12 23:51:35,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:35,509 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:51:35,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:51:35,534 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_849b24dd-201b-4b3c-8b56-91127dbf7589/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-12 23:51:35,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:35,700 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:51:35,726 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_849b24dd-201b-4b3c-8b56-91127dbf7589/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-12 23:51:35,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:51:35,904 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:51:35,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35 WrapperNode [2021-11-12 23:51:35,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:51:35,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:35,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:51:35,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:51:35,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:35,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:51:36,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:51:36,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:51:36,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:51:36,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:51:36,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:51:36,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:51:36,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:51:36,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (1/1) ... [2021-11-12 23:51:36,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:51:36,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:51:36,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:51:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:51:36,194 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 23:51:36,194 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 23:51:36,194 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:51:36,194 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:51:36,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:51:36,194 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:51:36,195 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:51:36,195 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:51:36,195 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:51:36,195 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:51:36,195 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:51:36,195 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:51:36,195 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:51:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:51:36,196 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:51:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:51:36,196 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:51:36,196 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:51:36,196 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:51:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:51:36,197 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:51:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:51:36,197 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:51:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:51:36,197 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:51:36,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:51:36,198 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:51:36,198 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:51:36,198 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 23:51:36,198 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 23:51:36,198 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:51:36,198 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:51:36,198 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 23:51:36,199 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 23:51:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:51:36,199 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:51:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:51:36,199 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:51:36,199 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:51:36,199 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:51:36,200 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:51:36,200 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:51:36,200 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:51:36,200 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:51:36,200 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:51:36,200 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:51:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:51:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:51:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:51:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:51:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:51:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:51:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:51:36,202 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:51:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:51:36,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:51:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:51:36,202 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:51:40,343 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:51:40,343 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:51:40,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:40 BoogieIcfgContainer [2021-11-12 23:51:40,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:51:40,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:51:40,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:51:40,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:51:40,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:51:34" (1/3) ... [2021-11-12 23:51:40,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d50ca8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:40, skipping insertion in model container [2021-11-12 23:51:40,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:51:35" (2/3) ... [2021-11-12 23:51:40,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d50ca8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:51:40, skipping insertion in model container [2021-11-12 23:51:40,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:51:40" (3/3) ... [2021-11-12 23:51:40,354 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2021-11-12 23:51:40,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:51:40,360 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:51:40,411 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:51:40,418 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:51:40,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:51:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 596 states, 459 states have (on average 1.673202614379085) internal successors, (768), 479 states have internal predecessors, (768), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 23:51:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:51:40,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:40,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:40,465 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1321862527, now seen corresponding path program 1 times [2021-11-12 23:51:40,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:40,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588946658] [2021-11-12 23:51:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:40,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:40,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:40,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:40,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:51:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:41,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:51:41,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:41,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:41,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:41,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588946658] [2021-11-12 23:51:41,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588946658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:41,953 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:41,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:51:41,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120709699] [2021-11-12 23:51:41,958 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:41,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:51:41,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:42,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:51:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:51:42,007 INFO L87 Difference]: Start difference. First operand has 596 states, 459 states have (on average 1.673202614379085) internal successors, (768), 479 states have internal predecessors, (768), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:42,562 INFO L93 Difference]: Finished difference Result 1195 states and 1989 transitions. [2021-11-12 23:51:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:51:42,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-12 23:51:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:42,602 INFO L225 Difference]: With dead ends: 1195 [2021-11-12 23:51:42,602 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 23:51:42,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:51:42,620 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 119 mSDsluCounter, 6586 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 7551 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.98ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:42,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 7551 Invalid, 114 Unknown, 0 Unchecked, 54.98ms Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 249.71ms Time] [2021-11-12 23:51:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 23:51:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 599. [2021-11-12 23:51:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 462 states have (on average 1.6645021645021645) internal successors, (769), 482 states have internal predecessors, (769), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 103 states have call predecessors, (108), 106 states have call successors, (108) [2021-11-12 23:51:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 986 transitions. [2021-11-12 23:51:42,731 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 986 transitions. Word has length 67 [2021-11-12 23:51:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 986 transitions. [2021-11-12 23:51:42,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 986 transitions. [2021-11-12 23:51:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:51:42,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:42,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:42,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:42,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:42,960 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1068252313, now seen corresponding path program 1 times [2021-11-12 23:51:42,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:42,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017620217] [2021-11-12 23:51:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:42,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:42,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:42,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:43,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:51:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:43,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:51:43,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:43,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:44,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:44,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017620217] [2021-11-12 23:51:44,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017620217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:44,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:44,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:51:44,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096811791] [2021-11-12 23:51:44,146 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:44,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:51:44,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:51:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:51:44,151 INFO L87 Difference]: Start difference. First operand 599 states and 986 transitions. Second operand has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:44,510 INFO L93 Difference]: Finished difference Result 1203 states and 1990 transitions. [2021-11-12 23:51:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:51:44,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 68 [2021-11-12 23:51:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:44,521 INFO L225 Difference]: With dead ends: 1203 [2021-11-12 23:51:44,521 INFO L226 Difference]: Without dead ends: 620 [2021-11-12 23:51:44,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:51:44,527 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 105 mSDsluCounter, 7523 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 8490 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.65ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 236.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:44,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 8490 Invalid, 137 Unknown, 0 Unchecked, 24.65ms Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 236.95ms Time] [2021-11-12 23:51:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-12 23:51:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 612. [2021-11-12 23:51:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 472 states have (on average 1.6610169491525424) internal successors, (784), 494 states have internal predecessors, (784), 110 states have call successors, (110), 27 states have call predecessors, (110), 29 states have return successors, (111), 104 states have call predecessors, (111), 107 states have call successors, (111) [2021-11-12 23:51:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1005 transitions. [2021-11-12 23:51:44,596 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1005 transitions. Word has length 68 [2021-11-12 23:51:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:44,598 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1005 transitions. [2021-11-12 23:51:44,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1005 transitions. [2021-11-12 23:51:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:51:44,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:44,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:44,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:44,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:44,819 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 831976675, now seen corresponding path program 1 times [2021-11-12 23:51:44,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:44,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724710187] [2021-11-12 23:51:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:44,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:44,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:44,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:51:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:45,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:51:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:45,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:45,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:45,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724710187] [2021-11-12 23:51:45,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724710187] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:45,934 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:45,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:51:45,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170301821] [2021-11-12 23:51:45,935 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:45,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:51:45,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:45,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:51:45,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:51:45,940 INFO L87 Difference]: Start difference. First operand 612 states and 1005 transitions. Second operand has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:46,235 INFO L93 Difference]: Finished difference Result 1229 states and 2029 transitions. [2021-11-12 23:51:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:51:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2021-11-12 23:51:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:46,244 INFO L225 Difference]: With dead ends: 1229 [2021-11-12 23:51:46,244 INFO L226 Difference]: Without dead ends: 633 [2021-11-12 23:51:46,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 127 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 23:51:46,249 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 173 mSDsluCounter, 6648 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 7615 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.20ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:46,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 7615 Invalid, 128 Unknown, 0 Unchecked, 19.20ms Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 196.87ms Time] [2021-11-12 23:51:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-12 23:51:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 625. [2021-11-12 23:51:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 482 states have (on average 1.657676348547718) internal successors, (799), 506 states have internal predecessors, (799), 111 states have call successors, (111), 27 states have call predecessors, (111), 31 states have return successors, (114), 105 states have call predecessors, (114), 108 states have call successors, (114) [2021-11-12 23:51:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1024 transitions. [2021-11-12 23:51:46,286 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1024 transitions. Word has length 69 [2021-11-12 23:51:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:46,286 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1024 transitions. [2021-11-12 23:51:46,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1024 transitions. [2021-11-12 23:51:46,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:51:46,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:46,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:46,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:46,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:46,508 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:46,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2027962686, now seen corresponding path program 1 times [2021-11-12 23:51:46,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:46,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129071855] [2021-11-12 23:51:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:46,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:46,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:46,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:46,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:51:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:47,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:51:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:47,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:47,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:47,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129071855] [2021-11-12 23:51:47,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129071855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:47,775 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:47,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:51:47,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728321928] [2021-11-12 23:51:47,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:47,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:51:47,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:51:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:51:47,779 INFO L87 Difference]: Start difference. First operand 625 states and 1024 transitions. Second operand has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:51:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:48,010 INFO L93 Difference]: Finished difference Result 1249 states and 2059 transitions. [2021-11-12 23:51:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:51:48,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-12 23:51:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:48,019 INFO L225 Difference]: With dead ends: 1249 [2021-11-12 23:51:48,019 INFO L226 Difference]: Without dead ends: 640 [2021-11-12 23:51:48,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 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 23:51:48,033 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 150 mSDsluCounter, 5518 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6472 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.81ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:48,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 6472 Invalid, 85 Unknown, 0 Unchecked, 16.81ms Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 148.92ms Time] [2021-11-12 23:51:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-11-12 23:51:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 638. [2021-11-12 23:51:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 492 states have (on average 1.6544715447154472) internal successors, (814), 518 states have internal predecessors, (814), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 106 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-12 23:51:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1046 transitions. [2021-11-12 23:51:48,077 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1046 transitions. Word has length 70 [2021-11-12 23:51:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:48,078 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1046 transitions. [2021-11-12 23:51:48,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:51:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1046 transitions. [2021-11-12 23:51:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:51:48,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:48,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:48,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:48,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:48,301 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash 912827463, now seen corresponding path program 1 times [2021-11-12 23:51:48,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:48,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992924321] [2021-11-12 23:51:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:48,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:48,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:48,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:48,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:51:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:48,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:51:48,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:48,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:49,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:49,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992924321] [2021-11-12 23:51:49,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992924321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:49,438 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:49,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:49,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679961381] [2021-11-12 23:51:49,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:49,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:49,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:49,440 INFO L87 Difference]: Start difference. First operand 638 states and 1046 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:49,864 INFO L93 Difference]: Finished difference Result 1272 states and 2095 transitions. [2021-11-12 23:51:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:51:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2021-11-12 23:51:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:49,873 INFO L225 Difference]: With dead ends: 1272 [2021-11-12 23:51:49,873 INFO L226 Difference]: Without dead ends: 644 [2021-11-12 23:51:49,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:51:49,880 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 205 mSDsluCounter, 6534 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 7478 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.85ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 299.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:49,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 7478 Invalid, 194 Unknown, 0 Unchecked, 15.85ms Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 299.32ms Time] [2021-11-12 23:51:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-12 23:51:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 634. [2021-11-12 23:51:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 488 states have (on average 1.6454918032786885) internal successors, (803), 514 states have internal predecessors, (803), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 106 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-12 23:51:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1035 transitions. [2021-11-12 23:51:49,922 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1035 transitions. Word has length 71 [2021-11-12 23:51:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:49,922 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1035 transitions. [2021-11-12 23:51:49,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1035 transitions. [2021-11-12 23:51:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:51:49,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:49,926 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:49,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:50,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:50,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1427527049, now seen corresponding path program 1 times [2021-11-12 23:51:50,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:50,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510750453] [2021-11-12 23:51:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:50,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:50,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:50,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:51:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:50,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:51:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:50,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:51,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:51,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510750453] [2021-11-12 23:51:51,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510750453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:51,017 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:51,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:51:51,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147200835] [2021-11-12 23:51:51,017 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:51,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:51:51,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:51,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:51:51,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:51:51,018 INFO L87 Difference]: Start difference. First operand 634 states and 1035 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:51:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:51,083 INFO L93 Difference]: Finished difference Result 1244 states and 2036 transitions. [2021-11-12 23:51:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:51:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 71 [2021-11-12 23:51:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:51,089 INFO L225 Difference]: With dead ends: 1244 [2021-11-12 23:51:51,089 INFO L226 Difference]: Without dead ends: 557 [2021-11-12 23:51:51,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 23:51:51,094 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 32 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:51,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1907 Invalid, 17 Unknown, 0 Unchecked, 3.52ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 22.86ms Time] [2021-11-12 23:51:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-12 23:51:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-12 23:51:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6288416075650118) internal successors, (689), 441 states have internal predecessors, (689), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:51:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 902 transitions. [2021-11-12 23:51:51,120 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 902 transitions. Word has length 71 [2021-11-12 23:51:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:51,121 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 902 transitions. [2021-11-12 23:51:51,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:51:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 902 transitions. [2021-11-12 23:51:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:51:51,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:51,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:51,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:51,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:51,341 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1385718813, now seen corresponding path program 1 times [2021-11-12 23:51:51,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:51,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738922493] [2021-11-12 23:51:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:51,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:51,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:51,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:51,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:51:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:51,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:51:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:52,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:52,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:52,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738922493] [2021-11-12 23:51:52,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738922493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:52,440 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:52,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:52,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868949072] [2021-11-12 23:51:52,440 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:52,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:52,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:52,441 INFO L87 Difference]: Start difference. First operand 557 states and 902 transitions. Second operand has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:52,669 INFO L93 Difference]: Finished difference Result 1101 states and 1792 transitions. [2021-11-12 23:51:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:51:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2021-11-12 23:51:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:52,678 INFO L225 Difference]: With dead ends: 1101 [2021-11-12 23:51:52,679 INFO L226 Difference]: Without dead ends: 557 [2021-11-12 23:51:52,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 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 23:51:52,685 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 38 mSDsluCounter, 7916 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 8801 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:52,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 8801 Invalid, 125 Unknown, 0 Unchecked, 12.26ms Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 139.57ms Time] [2021-11-12 23:51:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-12 23:51:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-12 23:51:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6264775413711583) internal successors, (688), 441 states have internal predecessors, (688), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:51:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 901 transitions. [2021-11-12 23:51:52,710 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 901 transitions. Word has length 72 [2021-11-12 23:51:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:52,710 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 901 transitions. [2021-11-12 23:51:52,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 901 transitions. [2021-11-12 23:51:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:51:52,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:52,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:52,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:52,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:52,928 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1452969140, now seen corresponding path program 1 times [2021-11-12 23:51:52,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:52,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740307483] [2021-11-12 23:51:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:52,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:52,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:52,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:51:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:51:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:53,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:54,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:54,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740307483] [2021-11-12 23:51:54,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740307483] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:54,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:54,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:54,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899296160] [2021-11-12 23:51:54,076 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:54,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:54,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:54,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:54,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:54,077 INFO L87 Difference]: Start difference. First operand 557 states and 901 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:54,284 INFO L93 Difference]: Finished difference Result 1101 states and 1790 transitions. [2021-11-12 23:51:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:51:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-12 23:51:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:54,291 INFO L225 Difference]: With dead ends: 1101 [2021-11-12 23:51:54,291 INFO L226 Difference]: Without dead ends: 557 [2021-11-12 23:51:54,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 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 23:51:54,296 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 36 mSDsluCounter, 7916 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 8801 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:54,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 8801 Invalid, 121 Unknown, 0 Unchecked, 10.10ms Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 125.10ms Time] [2021-11-12 23:51:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-12 23:51:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-12 23:51:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.624113475177305) internal successors, (687), 441 states have internal predecessors, (687), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:51:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 900 transitions. [2021-11-12 23:51:54,328 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 900 transitions. Word has length 73 [2021-11-12 23:51:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:54,328 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 900 transitions. [2021-11-12 23:51:54,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 900 transitions. [2021-11-12 23:51:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:51:54,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:54,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:54,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:54,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:54,550 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash 423566914, now seen corresponding path program 1 times [2021-11-12 23:51:54,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:54,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327486193] [2021-11-12 23:51:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:54,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:54,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:54,552 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:54,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:51:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:51:55,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:55,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:55,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:55,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327486193] [2021-11-12 23:51:55,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327486193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:55,668 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:55,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:55,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688081574] [2021-11-12 23:51:55,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:55,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:55,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:55,670 INFO L87 Difference]: Start difference. First operand 557 states and 900 transitions. Second operand has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:55,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:55,847 INFO L93 Difference]: Finished difference Result 1101 states and 1788 transitions. [2021-11-12 23:51:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:51:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 74 [2021-11-12 23:51:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:55,854 INFO L225 Difference]: With dead ends: 1101 [2021-11-12 23:51:55,855 INFO L226 Difference]: Without dead ends: 557 [2021-11-12 23:51:55,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 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 23:51:55,861 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 41 mSDsluCounter, 6152 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 7037 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.84ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:55,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 7037 Invalid, 91 Unknown, 0 Unchecked, 7.84ms Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 105.35ms Time] [2021-11-12 23:51:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-12 23:51:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-12 23:51:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.6217494089834514) internal successors, (686), 441 states have internal predecessors, (686), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:51:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 899 transitions. [2021-11-12 23:51:55,887 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 899 transitions. Word has length 74 [2021-11-12 23:51:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:55,887 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 899 transitions. [2021-11-12 23:51:55,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:51:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 899 transitions. [2021-11-12 23:51:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:51:55,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:55,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:51:55,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:56,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:56,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:56,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1851808175, now seen corresponding path program 1 times [2021-11-12 23:51:56,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:56,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558759774] [2021-11-12 23:51:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:56,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:56,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:56,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:51:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:56,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:51:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:51:56,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:51:57,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:57,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558759774] [2021-11-12 23:51:57,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558759774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:57,068 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:57,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:51:57,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821272519] [2021-11-12 23:51:57,069 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:57,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:51:57,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:57,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:51:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:51:57,071 INFO L87 Difference]: Start difference. First operand 557 states and 899 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 23:51:59,105 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 23:52:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:02,913 INFO L93 Difference]: Finished difference Result 2185 states and 3614 transitions. [2021-11-12 23:52:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:52:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 75 [2021-11-12 23:52:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:02,933 INFO L225 Difference]: With dead ends: 2185 [2021-11-12 23:52:02,933 INFO L226 Difference]: Without dead ends: 1646 [2021-11-12 23:52:02,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:52:02,939 INFO L933 BasicCegarLoop]: 1193 mSDtfsCounter, 2375 mSDsluCounter, 6387 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 320 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5059.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 7580 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.12ms SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5517.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:02,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2396 Valid, 7580 Invalid, 2186 Unknown, 0 Unchecked, 45.12ms Time], IncrementalHoareTripleChecker [320 Valid, 1865 Invalid, 1 Unknown, 0 Unchecked, 5517.87ms Time] [2021-11-12 23:52:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-11-12 23:52:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1628. [2021-11-12 23:52:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1248 states have (on average 1.6009615384615385) internal successors, (1998), 1302 states have internal predecessors, (1998), 306 states have call successors, (306), 75 states have call predecessors, (306), 73 states have return successors, (325), 292 states have call predecessors, (325), 301 states have call successors, (325) [2021-11-12 23:52:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2629 transitions. [2021-11-12 23:52:03,034 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2629 transitions. Word has length 75 [2021-11-12 23:52:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:03,035 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2629 transitions. [2021-11-12 23:52:03,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 23:52:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2629 transitions. [2021-11-12 23:52:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:52:03,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:03,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:03,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:03,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:03,258 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash -458912943, now seen corresponding path program 1 times [2021-11-12 23:52:03,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:03,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198839098] [2021-11-12 23:52:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:03,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:03,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:03,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:52:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:03,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:03,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:03,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:04,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:04,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198839098] [2021-11-12 23:52:04,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198839098] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:52:04,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:52:04,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 23:52:04,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992591740] [2021-11-12 23:52:04,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:04,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:52:04,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:04,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:52:04,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:04,231 INFO L87 Difference]: Start difference. First operand 1628 states and 2629 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:52:06,261 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 23:52:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:07,348 INFO L93 Difference]: Finished difference Result 4366 states and 7187 transitions. [2021-11-12 23:52:07,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:52:07,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-11-12 23:52:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:07,378 INFO L225 Difference]: With dead ends: 4366 [2021-11-12 23:52:07,378 INFO L226 Difference]: Without dead ends: 2756 [2021-11-12 23:52:07,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:52:07,390 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 862 mSDsluCounter, 4137 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2816.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 5295 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.39ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2935.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:07,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 5295 Invalid, 290 Unknown, 0 Unchecked, 14.39ms Time], IncrementalHoareTripleChecker [30 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2935.57ms Time] [2021-11-12 23:52:07,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-11-12 23:52:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2738. [2021-11-12 23:52:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2105 states have (on average 1.6104513064133017) internal successors, (3390), 2193 states have internal predecessors, (3390), 505 states have call successors, (505), 122 states have call predecessors, (505), 127 states have return successors, (587), 493 states have call predecessors, (587), 498 states have call successors, (587) [2021-11-12 23:52:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 4482 transitions. [2021-11-12 23:52:07,549 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 4482 transitions. Word has length 75 [2021-11-12 23:52:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:07,549 INFO L470 AbstractCegarLoop]: Abstraction has 2738 states and 4482 transitions. [2021-11-12 23:52:07,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:52:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 4482 transitions. [2021-11-12 23:52:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:52:07,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:07,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:07,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:07,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:07,771 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1359357280, now seen corresponding path program 1 times [2021-11-12 23:52:07,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:07,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622486809] [2021-11-12 23:52:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:07,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:07,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:07,773 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:07,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:52:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:08,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:08,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:08,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622486809] [2021-11-12 23:52:08,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622486809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:08,885 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:08,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:52:08,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799361677] [2021-11-12 23:52:08,886 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:08,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:08,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:08,887 INFO L87 Difference]: Start difference. First operand 2738 states and 4482 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:52:10,917 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 23:52:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:12,437 INFO L93 Difference]: Finished difference Result 8513 states and 14700 transitions. [2021-11-12 23:52:12,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 78 [2021-11-12 23:52:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:12,504 INFO L225 Difference]: With dead ends: 8513 [2021-11-12 23:52:12,504 INFO L226 Difference]: Without dead ends: 5793 [2021-11-12 23:52:12,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:52:12,527 INFO L933 BasicCegarLoop]: 1153 mSDtfsCounter, 978 mSDsluCounter, 3984 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3074.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 5137 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.75ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3240.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:12,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 5137 Invalid, 444 Unknown, 0 Unchecked, 15.75ms Time], IncrementalHoareTripleChecker [48 Valid, 395 Invalid, 1 Unknown, 0 Unchecked, 3240.60ms Time] [2021-11-12 23:52:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-11-12 23:52:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5405. [2021-11-12 23:52:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 4157 states have (on average 1.5997113302862642) internal successors, (6650), 4326 states have internal predecessors, (6650), 980 states have call successors, (980), 241 states have call predecessors, (980), 267 states have return successors, (1413), 979 states have call predecessors, (1413), 968 states have call successors, (1413) [2021-11-12 23:52:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 9043 transitions. [2021-11-12 23:52:12,895 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 9043 transitions. Word has length 78 [2021-11-12 23:52:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:12,896 INFO L470 AbstractCegarLoop]: Abstraction has 5405 states and 9043 transitions. [2021-11-12 23:52:12,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:52:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 9043 transitions. [2021-11-12 23:52:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 23:52:12,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:12,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:52:12,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:13,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:13,124 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash -599142051, now seen corresponding path program 1 times [2021-11-12 23:52:13,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:13,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817111222] [2021-11-12 23:52:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:13,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:13,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:13,126 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:13,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:52:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:13,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:13,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:52:13,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:52:13,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:13,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817111222] [2021-11-12 23:52:13,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817111222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:13,911 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:13,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:52:13,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135915628] [2021-11-12 23:52:13,912 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:13,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:52:13,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:13,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:52:13,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:52:13,913 INFO L87 Difference]: Start difference. First operand 5405 states and 9043 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:52:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:14,290 INFO L93 Difference]: Finished difference Result 10822 states and 18341 transitions. [2021-11-12 23:52:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 79 [2021-11-12 23:52:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:14,351 INFO L225 Difference]: With dead ends: 10822 [2021-11-12 23:52:14,351 INFO L226 Difference]: Without dead ends: 5435 [2021-11-12 23:52:14,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:52:14,441 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 30 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.84ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:14,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1742 Invalid, 72 Unknown, 0 Unchecked, 3.84ms Time], IncrementalHoareTripleChecker [18 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 91.81ms Time] [2021-11-12 23:52:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-11-12 23:52:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 5425. [2021-11-12 23:52:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 4172 states have (on average 1.5963566634707573) internal successors, (6660), 4341 states have internal predecessors, (6660), 980 states have call successors, (980), 251 states have call predecessors, (980), 272 states have return successors, (1388), 974 states have call predecessors, (1388), 968 states have call successors, (1388) [2021-11-12 23:52:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 9028 transitions. [2021-11-12 23:52:14,886 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 9028 transitions. Word has length 79 [2021-11-12 23:52:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:14,887 INFO L470 AbstractCegarLoop]: Abstraction has 5425 states and 9028 transitions. [2021-11-12 23:52:14,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:52:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 9028 transitions. [2021-11-12 23:52:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:52:14,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:14,890 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:52:14,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 23:52:15,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:15,110 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash 687934125, now seen corresponding path program 1 times [2021-11-12 23:52:15,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:15,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301161155] [2021-11-12 23:52:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:15,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:15,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:15,114 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:15,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:52:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:15,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:52:15,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:52:16,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:16,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301161155] [2021-11-12 23:52:16,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301161155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:16,310 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:16,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:52:16,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318622612] [2021-11-12 23:52:16,310 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:16,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:16,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:16,312 INFO L87 Difference]: Start difference. First operand 5425 states and 9028 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:52:18,339 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 23:52:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:20,794 INFO L93 Difference]: Finished difference Result 17061 states and 30662 transitions. [2021-11-12 23:52:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 87 [2021-11-12 23:52:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:20,971 INFO L225 Difference]: With dead ends: 17061 [2021-11-12 23:52:20,971 INFO L226 Difference]: Without dead ends: 11654 [2021-11-12 23:52:21,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:52:21,073 INFO L933 BasicCegarLoop]: 1161 mSDtfsCounter, 952 mSDsluCounter, 4716 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3612.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 5877 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.12ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3894.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:21,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 5877 Invalid, 703 Unknown, 0 Unchecked, 19.12ms Time], IncrementalHoareTripleChecker [40 Valid, 662 Invalid, 1 Unknown, 0 Unchecked, 3894.76ms Time] [2021-11-12 23:52:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11654 states. [2021-11-12 23:52:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11654 to 10834. [2021-11-12 23:52:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10834 states, 8331 states have (on average 1.5890049213779858) internal successors, (13238), 8667 states have internal predecessors, (13238), 1935 states have call successors, (1935), 499 states have call predecessors, (1935), 567 states have return successors, (3495), 1951 states have call predecessors, (3495), 1913 states have call successors, (3495) [2021-11-12 23:52:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10834 states to 10834 states and 18668 transitions. [2021-11-12 23:52:21,991 INFO L78 Accepts]: Start accepts. Automaton has 10834 states and 18668 transitions. Word has length 87 [2021-11-12 23:52:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:21,992 INFO L470 AbstractCegarLoop]: Abstraction has 10834 states and 18668 transitions. [2021-11-12 23:52:21,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:52:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 10834 states and 18668 transitions. [2021-11-12 23:52:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:52:21,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:21,996 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:52:22,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:22,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:22,219 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1924648248, now seen corresponding path program 1 times [2021-11-12 23:52:22,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:22,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913445141] [2021-11-12 23:52:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:22,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:22,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:22,221 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:22,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:52:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:52:22,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:52:23,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:23,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913445141] [2021-11-12 23:52:23,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913445141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:23,050 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:23,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:52:23,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020588846] [2021-11-12 23:52:23,050 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:23,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:52:23,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:52:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:52:23,052 INFO L87 Difference]: Start difference. First operand 10834 states and 18668 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:52:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:23,746 INFO L93 Difference]: Finished difference Result 21770 states and 38110 transitions. [2021-11-12 23:52:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:23,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 88 [2021-11-12 23:52:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:23,881 INFO L225 Difference]: With dead ends: 21770 [2021-11-12 23:52:23,881 INFO L226 Difference]: Without dead ends: 10954 [2021-11-12 23:52:24,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 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 23:52:24,057 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 21 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3466 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.73ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:24,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3466 Invalid, 93 Unknown, 0 Unchecked, 5.73ms Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 121.25ms Time] [2021-11-12 23:52:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10954 states. [2021-11-12 23:52:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10954 to 10934. [2021-11-12 23:52:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10934 states, 8421 states have (on average 1.583897399358746) internal successors, (13338), 8737 states have internal predecessors, (13338), 1935 states have call successors, (1935), 539 states have call predecessors, (1935), 577 states have return successors, (3457), 1941 states have call predecessors, (3457), 1913 states have call successors, (3457) [2021-11-12 23:52:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10934 states to 10934 states and 18730 transitions. [2021-11-12 23:52:24,824 INFO L78 Accepts]: Start accepts. Automaton has 10934 states and 18730 transitions. Word has length 88 [2021-11-12 23:52:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:24,825 INFO L470 AbstractCegarLoop]: Abstraction has 10934 states and 18730 transitions. [2021-11-12 23:52:24,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:52:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 10934 states and 18730 transitions. [2021-11-12 23:52:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:52:24,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:24,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-12 23:52:24,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:25,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:25,044 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash -18431621, now seen corresponding path program 1 times [2021-11-12 23:52:25,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:25,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306530220] [2021-11-12 23:52:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:25,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:25,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:25,046 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:25,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:52:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:25,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:25,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:52:25,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:52:26,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:26,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306530220] [2021-11-12 23:52:26,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306530220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:26,200 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:26,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:52:26,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529036270] [2021-11-12 23:52:26,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:26,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:26,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:26,205 INFO L87 Difference]: Start difference. First operand 10934 states and 18730 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:52:28,238 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 23:52:30,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:30,320 INFO L93 Difference]: Finished difference Result 34337 states and 65655 transitions. [2021-11-12 23:52:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:30,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 97 [2021-11-12 23:52:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:30,604 INFO L225 Difference]: With dead ends: 34337 [2021-11-12 23:52:30,604 INFO L226 Difference]: Without dead ends: 23421 [2021-11-12 23:52:30,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:52:30,862 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 919 mSDsluCounter, 4130 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2927.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 5313 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.25ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3081.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:30,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 5313 Invalid, 434 Unknown, 0 Unchecked, 13.25ms Time], IncrementalHoareTripleChecker [39 Valid, 394 Invalid, 1 Unknown, 0 Unchecked, 3081.58ms Time] [2021-11-12 23:52:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23421 states. [2021-11-12 23:52:32,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23421 to 21937. [2021-11-12 23:52:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21937 states, 16889 states have (on average 1.5772988335603055) internal successors, (26639), 17529 states have internal predecessors, (26639), 3850 states have call successors, (3850), 1075 states have call predecessors, (3850), 1197 states have return successors, (9038), 3900 states have call predecessors, (9038), 3808 states have call successors, (9038) [2021-11-12 23:52:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21937 states to 21937 states and 39527 transitions. [2021-11-12 23:52:32,885 INFO L78 Accepts]: Start accepts. Automaton has 21937 states and 39527 transitions. Word has length 97 [2021-11-12 23:52:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:32,885 INFO L470 AbstractCegarLoop]: Abstraction has 21937 states and 39527 transitions. [2021-11-12 23:52:32,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:52:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21937 states and 39527 transitions. [2021-11-12 23:52:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:52:32,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:32,887 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-12 23:52:32,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:33,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:33,092 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:33,093 INFO L85 PathProgramCache]: Analyzing trace with hash 689445490, now seen corresponding path program 1 times [2021-11-12 23:52:33,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:33,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425334702] [2021-11-12 23:52:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:33,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:33,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:33,094 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:33,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:52:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:33,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:52:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:52:33,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:52:33,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:33,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425334702] [2021-11-12 23:52:33,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425334702] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:33,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:33,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:52:33,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145822067] [2021-11-12 23:52:33,992 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:33,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:52:33,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:33,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:52:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:52:33,994 INFO L87 Difference]: Start difference. First operand 21937 states and 39527 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:52:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:35,397 INFO L93 Difference]: Finished difference Result 44096 states and 81214 transitions. [2021-11-12 23:52:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:52:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2021-11-12 23:52:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:35,605 INFO L225 Difference]: With dead ends: 44096 [2021-11-12 23:52:35,605 INFO L226 Difference]: Without dead ends: 22177 [2021-11-12 23:52:35,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 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 23:52:35,867 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 21 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3466 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.38ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:35,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3466 Invalid, 95 Unknown, 0 Unchecked, 5.38ms Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 153.08ms Time] [2021-11-12 23:52:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22177 states. [2021-11-12 23:52:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22177 to 22137. [2021-11-12 23:52:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22137 states, 17069 states have (on average 1.5723826820551878) internal successors, (26839), 17709 states have internal predecessors, (26839), 3850 states have call successors, (3850), 1115 states have call predecessors, (3850), 1217 states have return successors, (8986), 3880 states have call predecessors, (8986), 3808 states have call successors, (8986) [2021-11-12 23:52:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22137 states to 22137 states and 39675 transitions. [2021-11-12 23:52:37,547 INFO L78 Accepts]: Start accepts. Automaton has 22137 states and 39675 transitions. Word has length 98 [2021-11-12 23:52:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:37,548 INFO L470 AbstractCegarLoop]: Abstraction has 22137 states and 39675 transitions. [2021-11-12 23:52:37,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:52:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22137 states and 39675 transitions. [2021-11-12 23:52:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:52:37,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:37,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-11-12 23:52:37,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:37,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:37,765 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1299400590, now seen corresponding path program 1 times [2021-11-12 23:52:37,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:37,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201204680] [2021-11-12 23:52:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:37,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:37,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:37,767 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:37,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:52:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:52:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:52:38,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:52:39,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:39,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201204680] [2021-11-12 23:52:39,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201204680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:39,034 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:39,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:52:39,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633208115] [2021-11-12 23:52:39,034 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:39,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:52:39,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:39,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:52:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:52:39,036 INFO L87 Difference]: Start difference. First operand 22137 states and 39675 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:52:41,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:43,073 WARN L515 Checker$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 23:52:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:46,574 INFO L93 Difference]: Finished difference Result 69291 states and 145263 transitions. [2021-11-12 23:52:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:52:46,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 108 [2021-11-12 23:52:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:47,183 INFO L225 Difference]: With dead ends: 69291 [2021-11-12 23:52:47,184 INFO L226 Difference]: Without dead ends: 47172 [2021-11-12 23:52:47,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:52:47,578 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 924 mSDsluCounter, 4912 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5128.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 6070 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.48ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5314.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:47,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 6070 Invalid, 712 Unknown, 0 Unchecked, 12.48ms Time], IncrementalHoareTripleChecker [40 Valid, 670 Invalid, 2 Unknown, 0 Unchecked, 5314.66ms Time] [2021-11-12 23:52:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47172 states. [2021-11-12 23:52:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47172 to 44488. [2021-11-12 23:52:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44488 states, 34285 states have (on average 1.566632638179962) internal successors, (53712), 35593 states have internal predecessors, (53712), 7685 states have call successors, (7685), 2227 states have call predecessors, (7685), 2517 states have return successors, (24311), 7803 states have call predecessors, (24311), 7603 states have call successors, (24311) [2021-11-12 23:52:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44488 states to 44488 states and 85708 transitions. [2021-11-12 23:52:51,472 INFO L78 Accepts]: Start accepts. Automaton has 44488 states and 85708 transitions. Word has length 108 [2021-11-12 23:52:51,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:51,473 INFO L470 AbstractCegarLoop]: Abstraction has 44488 states and 85708 transitions. [2021-11-12 23:52:51,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:52:51,474 INFO L276 IsEmpty]: Start isEmpty. Operand 44488 states and 85708 transitions. [2021-11-12 23:52:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:52:51,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:51,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-11-12 23:52:51,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:51,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:51,685 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash -855641763, now seen corresponding path program 1 times [2021-11-12 23:52:51,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:51,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946679390] [2021-11-12 23:52:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:51,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:51,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:51,687 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:51,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:52:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:52,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:52:52,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:52:52,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:52:52,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:52,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946679390] [2021-11-12 23:52:52,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946679390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:52,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:53,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:52:53,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21968828] [2021-11-12 23:52:53,000 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:53,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:52:53,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:53,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:52:53,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:52:53,002 INFO L87 Difference]: Start difference. First operand 44488 states and 85708 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 23:52:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:58,366 INFO L93 Difference]: Finished difference Result 135193 states and 261648 transitions. [2021-11-12 23:52:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:52:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 109 [2021-11-12 23:52:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:59,478 INFO L225 Difference]: With dead ends: 135193 [2021-11-12 23:52:59,479 INFO L226 Difference]: Without dead ends: 91852 [2021-11-12 23:53:00,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:00,090 INFO L933 BasicCegarLoop]: 1260 mSDtfsCounter, 1649 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1016.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 3655 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.02ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1178.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:00,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 3655 Invalid, 304 Unknown, 0 Unchecked, 8.02ms Time], IncrementalHoareTripleChecker [15 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 1178.47ms Time] [2021-11-12 23:53:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91852 states. [2021-11-12 23:53:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91852 to 86419. [2021-11-12 23:53:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86419 states, 67499 states have (on average 1.5666602468184714) internal successors, (105748), 69313 states have internal predecessors, (105748), 14197 states have call successors, (14197), 4295 states have call predecessors, (14197), 4722 states have return successors, (48576), 14014 states have call predecessors, (48576), 14030 states have call successors, (48576) [2021-11-12 23:53:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86419 states to 86419 states and 168521 transitions. [2021-11-12 23:53:05,974 INFO L78 Accepts]: Start accepts. Automaton has 86419 states and 168521 transitions. Word has length 109 [2021-11-12 23:53:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:05,975 INFO L470 AbstractCegarLoop]: Abstraction has 86419 states and 168521 transitions. [2021-11-12 23:53:05,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 23:53:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 86419 states and 168521 transitions. [2021-11-12 23:53:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 23:53:05,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:05,982 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:06,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 23:53:06,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:06,192 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:06,193 INFO L85 PathProgramCache]: Analyzing trace with hash 387429825, now seen corresponding path program 1 times [2021-11-12 23:53:06,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:06,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257021908] [2021-11-12 23:53:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:06,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:06,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:06,194 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:06,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_849b24dd-201b-4b3c-8b56-91127dbf7589/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:53:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:06,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:53:06,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:53:07,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:53:07,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:07,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257021908] [2021-11-12 23:53:07,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257021908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:07,957 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:07,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-12 23:53:07,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347222874] [2021-11-12 23:53:07,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:07,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:53:07,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:53:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:53:07,959 INFO L87 Difference]: Start difference. First operand 86419 states and 168521 transitions. Second operand has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:53:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:15,494 INFO L93 Difference]: Finished difference Result 178331 states and 360452 transitions. [2021-11-12 23:53:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:53:15,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 157 [2021-11-12 23:53:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:16,233 INFO L225 Difference]: With dead ends: 178331 [2021-11-12 23:53:16,233 INFO L226 Difference]: Without dead ends: 91930 [2021-11-12 23:53:17,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:53:17,987 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 687 mSDsluCounter, 5056 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 123.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 6066 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.40ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:17,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 6066 Invalid, 83 Unknown, 0 Unchecked, 7.40ms Time], IncrementalHoareTripleChecker [42 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 150.38ms Time] [2021-11-12 23:53:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91930 states.