./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:35:40,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:35:40,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:35:40,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:35:40,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:35:40,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:35:40,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:35:40,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:35:40,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:35:40,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:35:40,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:35:40,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:35:40,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:35:40,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:35:40,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:35:40,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:35:40,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:35:40,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:35:40,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:35:40,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:35:40,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:35:40,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:35:40,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:35:40,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:35:40,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:35:40,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:35:40,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:35:40,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:35:40,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:35:40,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:35:40,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:35:40,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:35:40,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:35:40,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:35:40,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:35:40,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:35:40,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:35:40,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:35:40,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:35:40,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:35:40,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:35:40,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:35:40,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:35:40,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:35:40,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:35:40,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:35:40,865 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:35:40,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:35:40,865 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:35:40,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:35:40,865 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:35:40,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:35:40,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:35:40,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:35:40,867 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:35:40,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:35:40,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:35:40,868 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:35:40,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:35:40,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:35:40,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:35:40,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:35:40,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:35:40,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:35:40,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:35:40,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:35:40,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:35:40,871 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:35:40,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:35:40,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:35:40,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:35:40,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:35:40,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:35:40,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:40,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:35:40,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:35:40,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:35:40,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:35:40,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:35:40,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:35:40,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:35:40,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:35:40,875 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_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 [2021-11-19 13:35:41,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:35:41,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:35:41,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:35:41,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:35:41,197 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:35:41,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2021-11-19 13:35:41,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data/b609e044e/8f81d75b68ad469b9d46b4f36ff69a74/FLAGdd6e89e1a [2021-11-19 13:35:41,869 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:35:41,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2021-11-19 13:35:41,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data/b609e044e/8f81d75b68ad469b9d46b4f36ff69a74/FLAGdd6e89e1a [2021-11-19 13:35:42,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data/b609e044e/8f81d75b68ad469b9d46b4f36ff69a74 [2021-11-19 13:35:42,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:35:42,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:35:42,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:42,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:35:42,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:35:42,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:42" (1/1) ... [2021-11-19 13:35:42,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a35a066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:42, skipping insertion in model container [2021-11-19 13:35:42,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:42" (1/1) ... [2021-11-19 13:35:42,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:35:42,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:35:42,815 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2021-11-19 13:35:42,889 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:42,903 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:35:42,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ee8a059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:42, skipping insertion in model container [2021-11-19 13:35:42,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:42,904 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:35:42,907 INFO L158 Benchmark]: Toolchain (without parser) took 790.01ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 59.9MB in the beginning and 89.4MB in the end (delta: -29.5MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2021-11-19 13:35:42,908 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory was 68.6MB in the beginning and 68.6MB in the end (delta: 25.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:35:42,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 785.36ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 59.7MB in the beginning and 89.4MB in the end (delta: -29.7MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2021-11-19 13:35:42,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory was 68.6MB in the beginning and 68.6MB in the end (delta: 25.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 785.36ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 59.7MB in the beginning and 89.4MB in the end (delta: -29.7MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3042]: 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_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:35:45,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:35:45,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:35:45,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:35:45,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:35:45,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:35:45,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:35:45,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:35:45,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:35:45,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:35:45,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:35:45,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:35:45,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:35:45,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:35:45,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:35:45,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:35:45,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:35:45,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:35:45,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:35:45,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:35:45,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:35:45,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:35:45,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:35:45,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:35:45,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:35:45,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:35:45,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:35:45,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:35:45,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:35:45,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:35:45,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:35:45,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:35:45,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:35:45,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:35:45,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:35:45,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:35:45,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:35:45,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:35:45,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:35:45,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:35:45,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:35:45,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:35:45,344 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:35:45,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:35:45,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:35:45,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:35:45,346 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:35:45,346 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:35:45,347 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:35:45,347 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:35:45,348 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:35:45,348 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:35:45,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:35:45,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:35:45,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:35:45,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:35:45,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:35:45,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:35:45,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:35:45,353 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:35:45,353 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:35:45,353 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:35:45,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:35:45,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:35:45,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:35:45,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:35:45,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:35:45,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:35:45,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:35:45,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:45,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:35:45,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:35:45,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:35:45,356 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:35:45,356 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:35:45,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:35:45,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:35:45,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:35:45,358 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_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 [2021-11-19 13:35:45,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:35:45,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:35:45,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:35:45,789 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:35:45,792 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:35:45,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2021-11-19 13:35:45,850 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data/a27dd45f9/0de3a79d1a44477080136dc88c4d628e/FLAG7515afe3b [2021-11-19 13:35:46,507 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:35:46,508 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2021-11-19 13:35:46,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data/a27dd45f9/0de3a79d1a44477080136dc88c4d628e/FLAG7515afe3b [2021-11-19 13:35:46,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/data/a27dd45f9/0de3a79d1a44477080136dc88c4d628e [2021-11-19 13:35:46,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:35:46,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:35:46,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:46,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:35:46,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:35:46,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:46" (1/1) ... [2021-11-19 13:35:46,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@355c511c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:46, skipping insertion in model container [2021-11-19 13:35:46,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:35:46" (1/1) ... [2021-11-19 13:35:46,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:35:46,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:35:47,448 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2021-11-19 13:35:47,518 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:47,539 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:35:47,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:35:47,693 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2021-11-19 13:35:47,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:47,743 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:35:47,903 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2021-11-19 13:35:47,920 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:35:47,953 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:35:47,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47 WrapperNode [2021-11-19 13:35:47,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:35:47,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:35:47,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:35:47,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:35:47,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,090 INFO L137 Inliner]: procedures = 92, calls = 345, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 827 [2021-11-19 13:35:48,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:35:48,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:35:48,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:35:48,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:35:48,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:35:48,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:35:48,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:35:48,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:35:48,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (1/1) ... [2021-11-19 13:35:48,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:35:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:48,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:35:48,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:35:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:35:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 13:35:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 13:35:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:35:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:35:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:35:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:35:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:35:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:35:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 13:35:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 13:35:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:35:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:35:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:35:48,309 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:35:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:35:48,309 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:35:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:35:48,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:35:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:35:48,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:35:48,310 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:35:48,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:35:48,310 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:35:48,310 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:35:48,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:35:48,310 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:35:48,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:35:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 13:35:48,311 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 13:35:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:35:48,311 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:35:48,312 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 13:35:48,312 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 13:35:48,312 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:35:48,312 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:35:48,312 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:35:48,312 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:35:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:35:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:35:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:35:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:35:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:35:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:35:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:35:48,314 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:35:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:35:48,314 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:35:48,315 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:35:48,316 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:35:48,316 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:35:48,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:35:48,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:35:48,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:35:48,318 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:35:48,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:35:48,483 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:35:48,485 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:35:49,890 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:35:49,915 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:35:49,915 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:35:49,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:35:49 BoogieIcfgContainer [2021-11-19 13:35:49,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:35:49,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:35:49,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:35:49,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:35:49,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:35:46" (1/3) ... [2021-11-19 13:35:49,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2606d33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:35:49, skipping insertion in model container [2021-11-19 13:35:49,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:35:47" (2/3) ... [2021-11-19 13:35:49,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2606d33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:35:49, skipping insertion in model container [2021-11-19 13:35:49,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:35:49" (3/3) ... [2021-11-19 13:35:49,930 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product21.cil.c [2021-11-19 13:35:49,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:35:49,936 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:35:50,009 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:35:50,019 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:35:50,020 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:35:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 588 states, 454 states have (on average 1.6762114537444934) internal successors, (761), 472 states have internal predecessors, (761), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-19 13:35:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 13:35:50,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:50,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:50,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:50,117 INFO L85 PathProgramCache]: Analyzing trace with hash -803811748, now seen corresponding path program 1 times [2021-11-19 13:35:50,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:50,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425996579] [2021-11-19 13:35:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:50,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:50,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:50,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:50,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:35:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:50,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:50,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:51,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:51,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:51,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425996579] [2021-11-19 13:35:51,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425996579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:51,512 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:51,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:35:51,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299525320] [2021-11-19 13:35:51,515 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:51,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:35:51,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:51,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:35:51,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:35:51,574 INFO L87 Difference]: Start difference. First operand has 588 states, 454 states have (on average 1.6762114537444934) internal successors, (761), 472 states have internal predecessors, (761), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:35:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:52,073 INFO L93 Difference]: Finished difference Result 1179 states and 1967 transitions. [2021-11-19 13:35:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:35:52,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 99 [2021-11-19 13:35:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:52,108 INFO L225 Difference]: With dead ends: 1179 [2021-11-19 13:35:52,109 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 13:35:52,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:35:52,128 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 119 mSDsluCounter, 6516 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 7472 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:52,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 7472 Invalid, 116 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:35:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 13:35:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 591. [2021-11-19 13:35:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 457 states have (on average 1.6673960612691465) internal successors, (762), 475 states have internal predecessors, (762), 107 states have call successors, (107), 26 states have call predecessors, (107), 26 states have return successors, (106), 102 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-19 13:35:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 975 transitions. [2021-11-19 13:35:52,292 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 975 transitions. Word has length 99 [2021-11-19 13:35:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:52,292 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 975 transitions. [2021-11-19 13:35:52,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:35:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 975 transitions. [2021-11-19 13:35:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 13:35:52,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:52,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:52,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:52,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:52,521 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1606711870, now seen corresponding path program 1 times [2021-11-19 13:35:52,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:52,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725000931] [2021-11-19 13:35:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:52,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:52,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:52,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:35:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:53,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:53,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:53,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725000931] [2021-11-19 13:35:53,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725000931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:53,735 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:53,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:35:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990585656] [2021-11-19 13:35:53,741 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:53,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:35:53,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:35:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:35:53,746 INFO L87 Difference]: Start difference. First operand 591 states and 975 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:35:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:54,076 INFO L93 Difference]: Finished difference Result 1187 states and 1968 transitions. [2021-11-19 13:35:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:35:54,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 100 [2021-11-19 13:35:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:54,087 INFO L225 Difference]: With dead ends: 1187 [2021-11-19 13:35:54,087 INFO L226 Difference]: Without dead ends: 612 [2021-11-19 13:35:54,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:35:54,095 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 175 mSDsluCounter, 5616 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 6572 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:54,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 6572 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:35:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-19 13:35:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 604. [2021-11-19 13:35:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 467 states have (on average 1.6638115631691648) internal successors, (777), 487 states have internal predecessors, (777), 108 states have call successors, (108), 26 states have call predecessors, (108), 28 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-19 13:35:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 994 transitions. [2021-11-19 13:35:54,169 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 994 transitions. Word has length 100 [2021-11-19 13:35:54,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:54,172 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 994 transitions. [2021-11-19 13:35:54,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:35:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 994 transitions. [2021-11-19 13:35:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 13:35:54,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:54,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:54,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:54,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:54,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash -765839552, now seen corresponding path program 1 times [2021-11-19 13:35:54,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:54,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827431662] [2021-11-19 13:35:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:54,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:54,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:54,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:54,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:35:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:54,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:55,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:55,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:55,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827431662] [2021-11-19 13:35:55,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827431662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:55,600 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:55,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:35:55,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376762809] [2021-11-19 13:35:55,601 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:55,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:35:55,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:55,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:35:55,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:35:55,607 INFO L87 Difference]: Start difference. First operand 604 states and 994 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:35:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:55,885 INFO L93 Difference]: Finished difference Result 1213 states and 2007 transitions. [2021-11-19 13:35:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:35:55,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 101 [2021-11-19 13:35:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:55,895 INFO L225 Difference]: With dead ends: 1213 [2021-11-19 13:35:55,895 INFO L226 Difference]: Without dead ends: 625 [2021-11-19 13:35:55,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:35:55,903 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 174 mSDsluCounter, 5610 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 6566 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:55,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 6566 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:35:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-19 13:35:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 617. [2021-11-19 13:35:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 477 states have (on average 1.6603773584905661) internal successors, (792), 499 states have internal predecessors, (792), 109 states have call successors, (109), 26 states have call predecessors, (109), 30 states have return successors, (112), 104 states have call predecessors, (112), 106 states have call successors, (112) [2021-11-19 13:35:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1013 transitions. [2021-11-19 13:35:55,941 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1013 transitions. Word has length 101 [2021-11-19 13:35:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:55,941 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1013 transitions. [2021-11-19 13:35:55,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:35:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1013 transitions. [2021-11-19 13:35:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 13:35:55,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:55,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:55,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:56,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:56,165 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:56,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1688216345, now seen corresponding path program 1 times [2021-11-19 13:35:56,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:56,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317727263] [2021-11-19 13:35:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:56,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:56,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:56,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:35:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:56,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:35:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:56,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:57,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:57,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317727263] [2021-11-19 13:35:57,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317727263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:57,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:57,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:35:57,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477919416] [2021-11-19 13:35:57,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:57,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:35:57,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:35:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:35:57,220 INFO L87 Difference]: Start difference. First operand 617 states and 1013 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 13:35:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:57,416 INFO L93 Difference]: Finished difference Result 1233 states and 2037 transitions. [2021-11-19 13:35:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:35:57,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 102 [2021-11-19 13:35:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:57,423 INFO L225 Difference]: With dead ends: 1233 [2021-11-19 13:35:57,423 INFO L226 Difference]: Without dead ends: 632 [2021-11-19 13:35:57,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:35:57,428 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 150 mSDsluCounter, 5458 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:57,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 6402 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:35:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-19 13:35:57,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 630. [2021-11-19 13:35:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 487 states have (on average 1.6570841889117043) internal successors, (807), 511 states have internal predecessors, (807), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (118), 105 states have call predecessors, (118), 107 states have call successors, (118) [2021-11-19 13:35:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1035 transitions. [2021-11-19 13:35:57,468 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1035 transitions. Word has length 102 [2021-11-19 13:35:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:57,468 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1035 transitions. [2021-11-19 13:35:57,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 13:35:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1035 transitions. [2021-11-19 13:35:57,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 13:35:57,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:57,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:57,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:57,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:57,693 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1132068828, now seen corresponding path program 1 times [2021-11-19 13:35:57,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:57,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983928886] [2021-11-19 13:35:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:57,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:57,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:57,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:57,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:35:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:35:58,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:58,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:35:58,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:58,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983928886] [2021-11-19 13:35:58,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983928886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:58,858 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:58,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:35:58,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20006937] [2021-11-19 13:35:58,859 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:58,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:35:58,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:35:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:35:58,861 INFO L87 Difference]: Start difference. First operand 630 states and 1035 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:35:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:59,262 INFO L93 Difference]: Finished difference Result 1256 states and 2073 transitions. [2021-11-19 13:35:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:35:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 103 [2021-11-19 13:35:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:59,273 INFO L225 Difference]: With dead ends: 1256 [2021-11-19 13:35:59,273 INFO L226 Difference]: Without dead ends: 636 [2021-11-19 13:35:59,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:35:59,280 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 138 mSDsluCounter, 8260 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 9194 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:59,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 9194 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:35:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-19 13:35:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 626. [2021-11-19 13:35:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 483 states have (on average 1.6480331262939958) internal successors, (796), 507 states have internal predecessors, (796), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (118), 105 states have call predecessors, (118), 107 states have call successors, (118) [2021-11-19 13:35:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1024 transitions. [2021-11-19 13:35:59,327 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1024 transitions. Word has length 103 [2021-11-19 13:35:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:59,328 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1024 transitions. [2021-11-19 13:35:59,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:35:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1024 transitions. [2021-11-19 13:35:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 13:35:59,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:59,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:35:59,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:59,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:59,553 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 264239188, now seen corresponding path program 1 times [2021-11-19 13:35:59,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:59,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34231017] [2021-11-19 13:35:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:59,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:59,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:59,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:59,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:35:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:59,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:35:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:00,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:00,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:00,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34231017] [2021-11-19 13:36:00,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34231017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:00,448 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:00,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:36:00,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685844289] [2021-11-19 13:36:00,449 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:00,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:00,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:36:00,450 INFO L87 Difference]: Start difference. First operand 626 states and 1024 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:36:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:00,529 INFO L93 Difference]: Finished difference Result 1228 states and 2014 transitions. [2021-11-19 13:36:00,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:00,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 103 [2021-11-19 13:36:00,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:00,537 INFO L225 Difference]: With dead ends: 1228 [2021-11-19 13:36:00,537 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 13:36:00,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:00,546 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 32 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:00,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1885 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 13:36:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 13:36:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 418 states have (on average 1.631578947368421) internal successors, (682), 434 states have internal predecessors, (682), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 13:36:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 891 transitions. [2021-11-19 13:36:00,578 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 891 transitions. Word has length 103 [2021-11-19 13:36:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:00,579 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 891 transitions. [2021-11-19 13:36:00,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:36:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 891 transitions. [2021-11-19 13:36:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 13:36:00,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:00,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:00,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:00,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:00,801 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 92359238, now seen corresponding path program 1 times [2021-11-19 13:36:00,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:00,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542456438] [2021-11-19 13:36:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:00,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:00,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:00,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:00,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:36:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:36:01,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:01,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:01,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:01,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542456438] [2021-11-19 13:36:01,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542456438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:01,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:01,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:36:01,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601254198] [2021-11-19 13:36:01,971 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:01,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:36:01,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:36:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:01,973 INFO L87 Difference]: Start difference. First operand 549 states and 891 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:36:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:02,203 INFO L93 Difference]: Finished difference Result 1085 states and 1770 transitions. [2021-11-19 13:36:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:36:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 104 [2021-11-19 13:36:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:02,212 INFO L225 Difference]: With dead ends: 1085 [2021-11-19 13:36:02,212 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 13:36:02,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:36:02,220 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 75 mSDsluCounter, 6961 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 7835 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:02,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 7835 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 13:36:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 13:36:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 418 states have (on average 1.6291866028708133) internal successors, (681), 434 states have internal predecessors, (681), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 13:36:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 890 transitions. [2021-11-19 13:36:02,262 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 890 transitions. Word has length 104 [2021-11-19 13:36:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:02,262 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 890 transitions. [2021-11-19 13:36:02,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:36:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 890 transitions. [2021-11-19 13:36:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 13:36:02,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:02,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:02,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:02,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:02,486 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:02,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1271514281, now seen corresponding path program 1 times [2021-11-19 13:36:02,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:02,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750434307] [2021-11-19 13:36:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:02,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:02,488 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:02,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:36:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:02,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:36:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:03,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:03,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:03,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750434307] [2021-11-19 13:36:03,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750434307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:03,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:03,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:36:03,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258882647] [2021-11-19 13:36:03,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:03,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:36:03,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:36:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:03,566 INFO L87 Difference]: Start difference. First operand 549 states and 890 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:36:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:03,758 INFO L93 Difference]: Finished difference Result 1085 states and 1768 transitions. [2021-11-19 13:36:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:36:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 105 [2021-11-19 13:36:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:03,766 INFO L225 Difference]: With dead ends: 1085 [2021-11-19 13:36:03,766 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 13:36:03,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:36:03,771 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 46 mSDsluCounter, 6948 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 7822 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:03,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 7822 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 13:36:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 13:36:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 418 states have (on average 1.6267942583732058) internal successors, (680), 434 states have internal predecessors, (680), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 13:36:03,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 889 transitions. [2021-11-19 13:36:03,797 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 889 transitions. Word has length 105 [2021-11-19 13:36:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:03,797 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 889 transitions. [2021-11-19 13:36:03,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:36:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 889 transitions. [2021-11-19 13:36:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 13:36:03,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:03,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:03,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:04,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:04,021 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:04,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1047205611, now seen corresponding path program 1 times [2021-11-19 13:36:04,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:04,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055368375] [2021-11-19 13:36:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:04,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:04,023 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:04,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:36:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:04,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:36:04,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:04,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:05,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:05,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055368375] [2021-11-19 13:36:05,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055368375] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:05,108 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:05,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:36:05,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046241544] [2021-11-19 13:36:05,108 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:05,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:36:05,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:36:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:36:05,110 INFO L87 Difference]: Start difference. First operand 549 states and 889 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:36:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:05,256 INFO L93 Difference]: Finished difference Result 1085 states and 1766 transitions. [2021-11-19 13:36:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:36:05,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 106 [2021-11-19 13:36:05,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:05,262 INFO L225 Difference]: With dead ends: 1085 [2021-11-19 13:36:05,263 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 13:36:05,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:36:05,268 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 41 mSDsluCounter, 5205 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 6079 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:05,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 6079 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 13:36:05,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 13:36:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 418 states have (on average 1.624401913875598) internal successors, (679), 434 states have internal predecessors, (679), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 13:36:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 888 transitions. [2021-11-19 13:36:05,293 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 888 transitions. Word has length 106 [2021-11-19 13:36:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:05,293 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 888 transitions. [2021-11-19 13:36:05,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 13:36:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 888 transitions. [2021-11-19 13:36:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 13:36:05,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:05,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:05,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:05,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:05,517 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 265194798, now seen corresponding path program 1 times [2021-11-19 13:36:05,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:05,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108970512] [2021-11-19 13:36:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:05,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:05,518 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:05,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:36:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:05,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:36:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:06,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:06,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:06,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108970512] [2021-11-19 13:36:06,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108970512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:06,402 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:06,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 13:36:06,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368316476] [2021-11-19 13:36:06,403 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:06,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:36:06,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:06,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:36:06,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:36:06,405 INFO L87 Difference]: Start difference. First operand 549 states and 888 transitions. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 13:36:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:09,972 INFO L93 Difference]: Finished difference Result 2275 states and 3776 transitions. [2021-11-19 13:36:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:36:09,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) Word has length 107 [2021-11-19 13:36:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:09,989 INFO L225 Difference]: With dead ends: 2275 [2021-11-19 13:36:09,989 INFO L226 Difference]: Without dead ends: 1744 [2021-11-19 13:36:09,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:36:09,998 INFO L933 BasicCegarLoop]: 1167 mSDtfsCounter, 2601 mSDsluCounter, 6401 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2672 SdHoareTripleChecker+Valid, 7568 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:09,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2672 Valid, 7568 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 13:36:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-11-19 13:36:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1726. [2021-11-19 13:36:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1297 states have (on average 1.5967617579028528) internal successors, (2071), 1360 states have internal predecessors, (2071), 358 states have call successors, (358), 72 states have call predecessors, (358), 70 states have return successors, (375), 343 states have call predecessors, (375), 353 states have call successors, (375) [2021-11-19 13:36:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2804 transitions. [2021-11-19 13:36:10,092 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2804 transitions. Word has length 107 [2021-11-19 13:36:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:10,093 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2804 transitions. [2021-11-19 13:36:10,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 13:36:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2804 transitions. [2021-11-19 13:36:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:36:10,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:10,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:10,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:10,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:10,313 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2119031275, now seen corresponding path program 1 times [2021-11-19 13:36:10,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:10,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386545980] [2021-11-19 13:36:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:10,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:10,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:10,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:10,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:36:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:10,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:10,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:10,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:11,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:11,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386545980] [2021-11-19 13:36:11,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386545980] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:11,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:11,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 13:36:11,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382044540] [2021-11-19 13:36:11,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:11,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:36:11,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:11,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:36:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:36:11,267 INFO L87 Difference]: Start difference. First operand 1726 states and 2804 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:36:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:12,302 INFO L93 Difference]: Finished difference Result 4668 states and 7721 transitions. [2021-11-19 13:36:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:36:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 113 [2021-11-19 13:36:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:12,338 INFO L225 Difference]: With dead ends: 4668 [2021-11-19 13:36:12,338 INFO L226 Difference]: Without dead ends: 2960 [2021-11-19 13:36:12,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:36:12,360 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 873 mSDsluCounter, 3872 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 4931 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:12,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 4931 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:36:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-11-19 13:36:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2950. [2021-11-19 13:36:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2210 states have (on average 1.6040723981900453) internal successors, (3545), 2322 states have internal predecessors, (3545), 617 states have call successors, (617), 117 states have call predecessors, (617), 122 states have return successors, (701), 598 states have call predecessors, (701), 610 states have call successors, (701) [2021-11-19 13:36:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 4863 transitions. [2021-11-19 13:36:12,570 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 4863 transitions. Word has length 113 [2021-11-19 13:36:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:12,570 INFO L470 AbstractCegarLoop]: Abstraction has 2950 states and 4863 transitions. [2021-11-19 13:36:12,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:36:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 4863 transitions. [2021-11-19 13:36:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 13:36:12,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:12,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:12,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:12,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:12,794 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash 426526902, now seen corresponding path program 1 times [2021-11-19 13:36:12,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:12,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964386741] [2021-11-19 13:36:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:12,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:12,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:12,797 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:12,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:36:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:13,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:13,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:13,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:13,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964386741] [2021-11-19 13:36:13,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964386741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:13,756 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:13,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:36:13,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034494025] [2021-11-19 13:36:13,756 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:13,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:13,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:13,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:13,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:36:13,759 INFO L87 Difference]: Start difference. First operand 2950 states and 4863 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 13:36:15,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:15,840 INFO L93 Difference]: Finished difference Result 10249 states and 17777 transitions. [2021-11-19 13:36:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:36:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 116 [2021-11-19 13:36:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:15,920 INFO L225 Difference]: With dead ends: 10249 [2021-11-19 13:36:15,920 INFO L226 Difference]: Without dead ends: 7317 [2021-11-19 13:36:15,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:15,957 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1193 mSDsluCounter, 4492 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 5836 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:15,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 5836 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 13:36:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7317 states. [2021-11-19 13:36:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7317 to 5829. [2021-11-19 13:36:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5829 states, 4367 states have (on average 1.5937714678268835) internal successors, (6960), 4584 states have internal predecessors, (6960), 1204 states have call successors, (1204), 231 states have call predecessors, (1204), 257 states have return successors, (1641), 1189 states have call predecessors, (1641), 1192 states have call successors, (1641) [2021-11-19 13:36:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5829 states to 5829 states and 9805 transitions. [2021-11-19 13:36:16,482 INFO L78 Accepts]: Start accepts. Automaton has 5829 states and 9805 transitions. Word has length 116 [2021-11-19 13:36:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:16,482 INFO L470 AbstractCegarLoop]: Abstraction has 5829 states and 9805 transitions. [2021-11-19 13:36:16,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 13:36:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5829 states and 9805 transitions. [2021-11-19 13:36:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 13:36:16,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:16,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:16,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:16,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:16,705 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2137028789, now seen corresponding path program 1 times [2021-11-19 13:36:16,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:16,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872365216] [2021-11-19 13:36:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:16,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:16,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:16,708 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:16,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:36:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:17,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:36:17,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:17,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872365216] [2021-11-19 13:36:17,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872365216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:17,634 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:17,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:36:17,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583369041] [2021-11-19 13:36:17,635 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:17,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:17,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:36:17,636 INFO L87 Difference]: Start difference. First operand 5829 states and 9805 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:36:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:18,147 INFO L93 Difference]: Finished difference Result 11670 states and 19873 transitions. [2021-11-19 13:36:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:18,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 118 [2021-11-19 13:36:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:18,222 INFO L225 Difference]: With dead ends: 11670 [2021-11-19 13:36:18,222 INFO L226 Difference]: Without dead ends: 5859 [2021-11-19 13:36:18,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:18,261 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 19 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:18,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2572 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2021-11-19 13:36:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5849. [2021-11-19 13:36:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4382 states have (on average 1.5905979005020539) internal successors, (6970), 4599 states have internal predecessors, (6970), 1204 states have call successors, (1204), 241 states have call predecessors, (1204), 262 states have return successors, (1620), 1184 states have call predecessors, (1620), 1192 states have call successors, (1620) [2021-11-19 13:36:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 9794 transitions. [2021-11-19 13:36:18,654 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 9794 transitions. Word has length 118 [2021-11-19 13:36:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:18,654 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 9794 transitions. [2021-11-19 13:36:18,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 13:36:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 9794 transitions. [2021-11-19 13:36:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 13:36:18,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:18,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:18,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 13:36:18,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:18,872 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash 933674371, now seen corresponding path program 1 times [2021-11-19 13:36:18,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:18,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012797645] [2021-11-19 13:36:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:18,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:18,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:18,883 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:18,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:36:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:19,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:36:19,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 13:36:19,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:19,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012797645] [2021-11-19 13:36:19,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012797645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:19,832 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:19,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:36:19,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505583991] [2021-11-19 13:36:19,833 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:19,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:19,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:36:19,834 INFO L87 Difference]: Start difference. First operand 5849 states and 9794 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 13:36:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:22,802 INFO L93 Difference]: Finished difference Result 20533 states and 36852 transitions. [2021-11-19 13:36:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:36:22,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 126 [2021-11-19 13:36:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:22,948 INFO L225 Difference]: With dead ends: 20533 [2021-11-19 13:36:22,948 INFO L226 Difference]: Without dead ends: 14702 [2021-11-19 13:36:22,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:23,000 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 1163 mSDsluCounter, 4547 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 5900 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:23,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 5900 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 13:36:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14702 states. [2021-11-19 13:36:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14702 to 11682. [2021-11-19 13:36:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11682 states, 8751 states have (on average 1.5835904468060793) internal successors, (13858), 9183 states have internal predecessors, (13858), 2383 states have call successors, (2383), 479 states have call predecessors, (2383), 547 states have return successors, (3909), 2371 states have call predecessors, (3909), 2361 states have call successors, (3909) [2021-11-19 13:36:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11682 states to 11682 states and 20150 transitions. [2021-11-19 13:36:24,119 INFO L78 Accepts]: Start accepts. Automaton has 11682 states and 20150 transitions. Word has length 126 [2021-11-19 13:36:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:24,119 INFO L470 AbstractCegarLoop]: Abstraction has 11682 states and 20150 transitions. [2021-11-19 13:36:24,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 13:36:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 11682 states and 20150 transitions. [2021-11-19 13:36:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 13:36:24,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:24,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:24,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:24,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:24,352 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1348907921, now seen corresponding path program 1 times [2021-11-19 13:36:24,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:24,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237883505] [2021-11-19 13:36:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:24,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:24,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:24,356 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:24,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:36:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:25,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 13:36:25,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:25,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237883505] [2021-11-19 13:36:25,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237883505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:25,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:25,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:36:25,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919874543] [2021-11-19 13:36:25,280 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:25,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:25,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:25,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:25,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:36:25,282 INFO L87 Difference]: Start difference. First operand 11682 states and 20150 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 13:36:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:26,289 INFO L93 Difference]: Finished difference Result 23466 states and 41090 transitions. [2021-11-19 13:36:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:26,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2021-11-19 13:36:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:26,383 INFO L225 Difference]: With dead ends: 23466 [2021-11-19 13:36:26,383 INFO L226 Difference]: Without dead ends: 11802 [2021-11-19 13:36:26,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:26,480 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 21 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3422 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:26,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3422 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2021-11-19 13:36:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 11782. [2021-11-19 13:36:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11782 states, 8841 states have (on average 1.5787806809184481) internal successors, (13958), 9253 states have internal predecessors, (13958), 2383 states have call successors, (2383), 519 states have call predecessors, (2383), 557 states have return successors, (3879), 2361 states have call predecessors, (3879), 2361 states have call successors, (3879) [2021-11-19 13:36:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11782 states to 11782 states and 20220 transitions. [2021-11-19 13:36:27,334 INFO L78 Accepts]: Start accepts. Automaton has 11782 states and 20220 transitions. Word has length 128 [2021-11-19 13:36:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:27,335 INFO L470 AbstractCegarLoop]: Abstraction has 11782 states and 20220 transitions. [2021-11-19 13:36:27,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 13:36:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 11782 states and 20220 transitions. [2021-11-19 13:36:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 13:36:27,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:27,340 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:27,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 13:36:27,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:27,562 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:27,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:27,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1151447714, now seen corresponding path program 1 times [2021-11-19 13:36:27,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:27,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249152450] [2021-11-19 13:36:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:27,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:27,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:27,564 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:27,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:36:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:27,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:36:28,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:36:28,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:28,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249152450] [2021-11-19 13:36:28,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249152450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:28,645 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:28,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:36:28,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288363443] [2021-11-19 13:36:28,646 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:28,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:28,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:36:28,647 INFO L87 Difference]: Start difference. First operand 11782 states and 20220 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 13:36:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:32,419 INFO L93 Difference]: Finished difference Result 41281 states and 77769 transitions. [2021-11-19 13:36:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:36:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 136 [2021-11-19 13:36:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:32,705 INFO L225 Difference]: With dead ends: 41281 [2021-11-19 13:36:32,705 INFO L226 Difference]: Without dead ends: 29517 [2021-11-19 13:36:32,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:32,875 INFO L933 BasicCegarLoop]: 1351 mSDtfsCounter, 1138 mSDsluCounter, 5537 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 6888 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:32,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 6888 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 13:36:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29517 states. [2021-11-19 13:36:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29517 to 23633. [2021-11-19 13:36:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23633 states, 17729 states have (on average 1.572508319702183) internal successors, (27879), 18561 states have internal predecessors, (27879), 4746 states have call successors, (4746), 1035 states have call predecessors, (4746), 1157 states have return successors, (9618), 4740 states have call predecessors, (9618), 4704 states have call successors, (9618) [2021-11-19 13:36:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23633 states to 23633 states and 42243 transitions. [2021-11-19 13:36:35,746 INFO L78 Accepts]: Start accepts. Automaton has 23633 states and 42243 transitions. Word has length 136 [2021-11-19 13:36:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:35,747 INFO L470 AbstractCegarLoop]: Abstraction has 23633 states and 42243 transitions. [2021-11-19 13:36:35,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 13:36:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 23633 states and 42243 transitions. [2021-11-19 13:36:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:36:35,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:35,753 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:35,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:35,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:35,969 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1583803881, now seen corresponding path program 1 times [2021-11-19 13:36:35,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:35,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467396686] [2021-11-19 13:36:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:35,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:35,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:35,972 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:36,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:36:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:36:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:36:36,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:36:37,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:37,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467396686] [2021-11-19 13:36:37,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467396686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:37,045 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:37,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:36:37,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628167961] [2021-11-19 13:36:37,046 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:37,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:36:37,048 INFO L87 Difference]: Start difference. First operand 23633 states and 42243 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 13:36:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:38,690 INFO L93 Difference]: Finished difference Result 47488 states and 86678 transitions. [2021-11-19 13:36:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:38,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 139 [2021-11-19 13:36:38,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:39,067 INFO L225 Difference]: With dead ends: 47488 [2021-11-19 13:36:39,067 INFO L226 Difference]: Without dead ends: 23873 [2021-11-19 13:36:39,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:39,543 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 21 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3422 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:39,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3422 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23873 states. [2021-11-19 13:36:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23873 to 23833. [2021-11-19 13:36:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23833 states, 17909 states have (on average 1.5678709028979843) internal successors, (28079), 18741 states have internal predecessors, (28079), 4746 states have call successors, (4746), 1075 states have call predecessors, (4746), 1177 states have return successors, (9582), 4720 states have call predecessors, (9582), 4704 states have call successors, (9582) [2021-11-19 13:36:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23833 states to 23833 states and 42407 transitions. [2021-11-19 13:36:41,602 INFO L78 Accepts]: Start accepts. Automaton has 23833 states and 42407 transitions. Word has length 139 [2021-11-19 13:36:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:41,602 INFO L470 AbstractCegarLoop]: Abstraction has 23833 states and 42407 transitions. [2021-11-19 13:36:41,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 13:36:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23833 states and 42407 transitions. [2021-11-19 13:36:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 13:36:41,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:41,607 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] [2021-11-19 13:36:41,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:41,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:41,821 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:41,822 INFO L85 PathProgramCache]: Analyzing trace with hash 477742835, now seen corresponding path program 1 times [2021-11-19 13:36:41,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:41,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179115780] [2021-11-19 13:36:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:41,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:41,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:41,824 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:41,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:36:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:42,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:36:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:36:42,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:36:43,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:43,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179115780] [2021-11-19 13:36:43,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179115780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:43,049 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:43,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:36:43,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294187116] [2021-11-19 13:36:43,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:43,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:43,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:36:43,051 INFO L87 Difference]: Start difference. First operand 23833 states and 42407 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 13:36:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:48,170 INFO L93 Difference]: Finished difference Result 83179 states and 167859 transitions. [2021-11-19 13:36:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:36:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 149 [2021-11-19 13:36:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:48,643 INFO L225 Difference]: With dead ends: 83179 [2021-11-19 13:36:48,643 INFO L226 Difference]: Without dead ends: 59364 [2021-11-19 13:36:49,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:36:49,118 INFO L933 BasicCegarLoop]: 1210 mSDtfsCounter, 1205 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 5448 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:49,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 5448 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 13:36:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59364 states. [2021-11-19 13:36:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59364 to 47880. [2021-11-19 13:36:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47880 states, 35965 states have (on average 1.562407896566106) internal successors, (56192), 37657 states have internal predecessors, (56192), 9477 states have call successors, (9477), 2147 states have call predecessors, (9477), 2437 states have return successors, (24441), 9483 states have call predecessors, (24441), 9395 states have call successors, (24441) [2021-11-19 13:36:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47880 states to 47880 states and 90110 transitions. [2021-11-19 13:36:52,981 INFO L78 Accepts]: Start accepts. Automaton has 47880 states and 90110 transitions. Word has length 149 [2021-11-19 13:36:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:52,981 INFO L470 AbstractCegarLoop]: Abstraction has 47880 states and 90110 transitions. [2021-11-19 13:36:52,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 13:36:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 47880 states and 90110 transitions. [2021-11-19 13:36:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 13:36:52,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:52,985 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] [2021-11-19 13:36:53,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 13:36:53,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:53,203 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:53,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash 321320219, now seen corresponding path program 1 times [2021-11-19 13:36:53,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:53,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802856789] [2021-11-19 13:36:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:53,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:53,206 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:53,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:36:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:53,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:36:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:36:53,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 13:36:54,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:54,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802856789] [2021-11-19 13:36:54,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802856789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:54,256 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:54,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 13:36:54,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675932603] [2021-11-19 13:36:54,257 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:54,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:36:54,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:36:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:36:54,259 INFO L87 Difference]: Start difference. First operand 47880 states and 90110 transitions. Second operand has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-19 13:37:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:01,070 INFO L93 Difference]: Finished difference Result 109308 states and 222528 transitions. [2021-11-19 13:37:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:37:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 150 [2021-11-19 13:37:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:01,489 INFO L225 Difference]: With dead ends: 109308 [2021-11-19 13:37:01,490 INFO L226 Difference]: Without dead ends: 61446 [2021-11-19 13:37:02,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:37:02,191 INFO L933 BasicCegarLoop]: 1314 mSDtfsCounter, 1811 mSDsluCounter, 3277 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 4591 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:02,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1898 Valid, 4591 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:37:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61446 states. [2021-11-19 13:37:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61446 to 55404. [2021-11-19 13:37:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55404 states, 41085 states have (on average 1.5599367165632225) internal successors, (64090), 43225 states have internal predecessors, (64090), 11529 states have call successors, (11529), 2451 states have call predecessors, (11529), 2789 states have return successors, (32735), 11495 states have call predecessors, (32735), 11447 states have call successors, (32735) [2021-11-19 13:37:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55404 states to 55404 states and 108354 transitions. [2021-11-19 13:37:06,108 INFO L78 Accepts]: Start accepts. Automaton has 55404 states and 108354 transitions. Word has length 150 [2021-11-19 13:37:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:06,109 INFO L470 AbstractCegarLoop]: Abstraction has 55404 states and 108354 transitions. [2021-11-19 13:37:06,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-19 13:37:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 55404 states and 108354 transitions. [2021-11-19 13:37:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 13:37:06,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:06,113 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:37:06,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:06,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:06,332 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1177777931, now seen corresponding path program 1 times [2021-11-19 13:37:06,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:06,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302059273] [2021-11-19 13:37:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:06,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:06,335 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:06,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5977876e-8123-4e09-9057-06bed047cf07/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:37:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:06,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:37:06,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:37:07,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 13:37:08,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:08,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302059273] [2021-11-19 13:37:08,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302059273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:37:08,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:37:08,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-19 13:37:08,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793335680] [2021-11-19 13:37:08,628 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:08,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:37:08,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:37:08,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:37:08,630 INFO L87 Difference]: Start difference. First operand 55404 states and 108354 transitions. Second operand has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 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) [2021-11-19 13:37:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:17,226 INFO L93 Difference]: Finished difference Result 132801 states and 267648 transitions. [2021-11-19 13:37:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:37:17,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 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 154 [2021-11-19 13:37:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:18,275 INFO L225 Difference]: With dead ends: 132801 [2021-11-19 13:37:18,275 INFO L226 Difference]: Without dead ends: 77415