./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:37:09,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:37:09,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:37:09,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:37:09,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:37:09,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:37:09,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:37:09,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:37:09,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:37:09,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:37:09,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:37:09,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:37:09,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:37:09,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:37:09,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:37:09,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:37:09,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:37:09,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:37:09,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:37:09,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:37:09,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:37:09,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:37:09,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:37:09,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:37:09,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:37:09,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:37:09,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:37:09,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:37:09,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:37:09,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:37:09,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:37:09,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:37:09,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:37:09,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:37:09,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:37:09,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:37:09,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:37:09,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:37:09,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:37:09,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:37:09,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:37:09,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:37:09,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:37:09,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:37:09,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:37:09,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:37:09,830 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:37:09,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:37:09,830 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:37:09,831 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:37:09,831 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:37:09,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:37:09,832 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:37:09,832 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:37:09,832 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:37:09,833 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:37:09,833 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:37:09,833 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:37:09,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:37:09,834 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:37:09,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:37:09,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:37:09,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:37:09,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:37:09,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:37:09,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:37:09,837 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:37:09,837 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:37:09,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:37:09,838 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:37:09,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:37:09,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:37:09,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:37:09,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:09,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:37:09,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:37:09,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:37:09,840 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:37:09,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:37:09,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:37:09,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:37:09,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:37:09,842 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_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-13 02:37:10,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:37:10,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:37:10,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:37:10,242 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:37:10,243 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:37:10,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-13 02:37:10,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data/506afbb7a/8d5cc3f5a3d148efa90eb917e02a5d86/FLAGdb2971251 [2021-11-13 02:37:11,183 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:37:11,184 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-13 02:37:11,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data/506afbb7a/8d5cc3f5a3d148efa90eb917e02a5d86/FLAGdb2971251 [2021-11-13 02:37:11,353 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data/506afbb7a/8d5cc3f5a3d148efa90eb917e02a5d86 [2021-11-13 02:37:11,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:37:11,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:37:11,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:11,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:37:11,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:37:11,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:11" (1/1) ... [2021-11-13 02:37:11,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfcd9ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:11, skipping insertion in model container [2021-11-13 02:37:11,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:11" (1/1) ... [2021-11-13 02:37:11,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:37:11,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:11,757 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-13 02:37:12,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:12,285 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:37:12,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@22418bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:12, skipping insertion in model container [2021-11-13 02:37:12,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:12,287 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:37:12,291 INFO L158 Benchmark]: Toolchain (without parser) took 926.06ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 70.5MB in the beginning and 89.3MB in the end (delta: -18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-13 02:37:12,292 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 102.8MB. Free memory is still 60.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:37:12,295 INFO L158 Benchmark]: CACSL2BoogieTranslator took 919.89ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 70.3MB in the beginning and 89.3MB in the end (delta: -19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-13 02:37:12,298 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 102.8MB. Free memory is still 60.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 919.89ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 70.3MB in the beginning and 89.3MB in the end (delta: -19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3079]: 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_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:37:15,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:37:15,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:37:15,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:37:15,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:37:15,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:37:15,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:37:15,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:37:15,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:37:15,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:37:15,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:37:15,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:37:15,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:37:15,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:37:15,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:37:15,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:37:15,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:37:15,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:37:15,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:37:15,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:37:15,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:37:15,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:37:15,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:37:15,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:37:15,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:37:15,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:37:15,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:37:15,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:37:15,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:37:15,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:37:15,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:37:15,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:37:15,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:37:15,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:37:15,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:37:15,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:37:15,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:37:15,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:37:15,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:37:15,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:37:15,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:37:15,216 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:37:15,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:37:15,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:37:15,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:37:15,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:37:15,271 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:37:15,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:37:15,272 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:37:15,272 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:37:15,272 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:37:15,273 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:37:15,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:37:15,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:37:15,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:37:15,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:37:15,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:37:15,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:37:15,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:37:15,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:37:15,278 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:37:15,278 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:37:15,278 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:37:15,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:37:15,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:37:15,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:37:15,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:37:15,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:37:15,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:37:15,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:15,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:37:15,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:37:15,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:37:15,281 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:37:15,282 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:37:15,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:37:15,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:37:15,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:37:15,283 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_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-13 02:37:15,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:37:15,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:37:15,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:37:15,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:37:15,798 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:37:15,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-13 02:37:15,879 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data/776f47a68/94c117b6961d4b64aedeb09f163c6e6e/FLAGf37eedd3f [2021-11-13 02:37:16,725 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:37:16,733 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-13 02:37:16,774 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data/776f47a68/94c117b6961d4b64aedeb09f163c6e6e/FLAGf37eedd3f [2021-11-13 02:37:16,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/data/776f47a68/94c117b6961d4b64aedeb09f163c6e6e [2021-11-13 02:37:16,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:37:16,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:37:16,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:16,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:37:16,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:37:16,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:16" (1/1) ... [2021-11-13 02:37:16,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405b7b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:16, skipping insertion in model container [2021-11-13 02:37:16,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:37:16" (1/1) ... [2021-11-13 02:37:16,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:37:17,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:17,226 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-13 02:37:17,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:17,743 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:37:17,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:37:17,792 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-13 02:37:17,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:17,922 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:37:17,939 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-13 02:37:18,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:37:18,115 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:37:18,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18 WrapperNode [2021-11-13 02:37:18,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:37:18,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:37:18,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:37:18,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:37:18,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:37:18,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:37:18,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:37:18,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:37:18,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:37:18,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:37:18,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:37:18,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:37:18,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (1/1) ... [2021-11-13 02:37:18,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:37:18,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:18,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:37:18,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:37:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-13 02:37:18,531 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-13 02:37:18,531 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-13 02:37:18,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-13 02:37:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-13 02:37:18,532 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-13 02:37:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:37:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-13 02:37:18,532 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-13 02:37:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-13 02:37:18,533 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-13 02:37:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-13 02:37:18,533 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-13 02:37:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-13 02:37:18,534 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-13 02:37:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-13 02:37:18,534 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-13 02:37:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-13 02:37:18,534 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-13 02:37:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-13 02:37:18,535 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-13 02:37:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-13 02:37:18,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-13 02:37:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-13 02:37:18,535 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-13 02:37:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-13 02:37:18,536 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-13 02:37:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-13 02:37:18,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-13 02:37:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:37:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-13 02:37:18,536 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-13 02:37:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-13 02:37:18,537 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-13 02:37:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-13 02:37:18,537 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-13 02:37:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-13 02:37:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-13 02:37:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-13 02:37:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-13 02:37:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-13 02:37:18,538 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-13 02:37:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-13 02:37:18,539 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-13 02:37:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-13 02:37:18,539 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-13 02:37:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-13 02:37:18,539 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-13 02:37:18,539 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-13 02:37:18,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-13 02:37:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:37:18,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:37:18,540 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-13 02:37:18,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-13 02:37:22,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:37:22,872 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:37:22,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:37:22 BoogieIcfgContainer [2021-11-13 02:37:22,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:37:22,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:37:22,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:37:22,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:37:22,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:37:16" (1/3) ... [2021-11-13 02:37:22,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ddb4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:37:22, skipping insertion in model container [2021-11-13 02:37:22,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:37:18" (2/3) ... [2021-11-13 02:37:22,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ddb4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:37:22, skipping insertion in model container [2021-11-13 02:37:22,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:37:22" (3/3) ... [2021-11-13 02:37:22,888 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2021-11-13 02:37:22,896 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:37:22,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:37:22,977 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:37:22,989 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:37:22,990 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:37:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 579 states, 454 states have (on average 1.6916299559471366) internal successors, (768), 475 states have internal predecessors, (768), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-13 02:37:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 02:37:23,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:23,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:23,090 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1983373863, now seen corresponding path program 1 times [2021-11-13 02:37:23,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:23,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424986351] [2021-11-13 02:37:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:23,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:23,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:23,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:23,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:37:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:37:24,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:37:24,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 02:37:24,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:24,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424986351] [2021-11-13 02:37:24,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424986351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:24,714 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:24,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:37:24,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800380727] [2021-11-13 02:37:24,717 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:37:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:37:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:37:24,785 INFO L87 Difference]: Start difference. First operand has 579 states, 454 states have (on average 1.6916299559471366) internal successors, (768), 475 states have internal predecessors, (768), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:37:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:24,919 INFO L93 Difference]: Finished difference Result 600 states and 994 transitions. [2021-11-13 02:37:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:37:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 111 [2021-11-13 02:37:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:24,957 INFO L225 Difference]: With dead ends: 600 [2021-11-13 02:37:24,958 INFO L226 Difference]: Without dead ends: 571 [2021-11-13 02:37:24,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:37:24,968 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:24,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 25.86ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:37:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-13 02:37:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-13 02:37:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6897321428571428) internal successors, (757), 467 states have internal predecessors, (757), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 948 transitions. [2021-11-13 02:37:25,107 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 948 transitions. Word has length 111 [2021-11-13 02:37:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:25,109 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 948 transitions. [2021-11-13 02:37:25,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:37:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 948 transitions. [2021-11-13 02:37:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 02:37:25,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:25,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:25,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:25,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:25,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:25,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2050586346, now seen corresponding path program 1 times [2021-11-13 02:37:25,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:25,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994823296] [2021-11-13 02:37:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:25,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:25,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:25,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:25,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:37:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:26,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:26,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:37:26,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:26,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:26,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994823296] [2021-11-13 02:37:26,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994823296] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:26,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:26,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:26,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081417197] [2021-11-13 02:37:26,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:26,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:26,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:26,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:26,801 INFO L87 Difference]: Start difference. First operand 571 states and 948 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:26,947 INFO L93 Difference]: Finished difference Result 1133 states and 1888 transitions. [2021-11-13 02:37:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:26,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2021-11-13 02:37:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:26,958 INFO L225 Difference]: With dead ends: 1133 [2021-11-13 02:37:26,958 INFO L226 Difference]: Without dead ends: 571 [2021-11-13 02:37:26,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:26,967 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 14 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.78ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.22ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:26,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2795 Invalid, 35 Unknown, 0 Unchecked, 17.78ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 47.22ms Time] [2021-11-13 02:37:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-13 02:37:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-13 02:37:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6875) internal successors, (756), 467 states have internal predecessors, (756), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 947 transitions. [2021-11-13 02:37:27,027 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 947 transitions. Word has length 113 [2021-11-13 02:37:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:27,027 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 947 transitions. [2021-11-13 02:37:27,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 947 transitions. [2021-11-13 02:37:27,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 02:37:27,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:27,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:27,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:27,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:27,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:27,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash 229491886, now seen corresponding path program 1 times [2021-11-13 02:37:27,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:27,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938344268] [2021-11-13 02:37:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:27,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:27,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:27,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:27,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:37:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:37:28,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:28,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:28,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938344268] [2021-11-13 02:37:28,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938344268] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:28,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:28,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:28,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947948554] [2021-11-13 02:37:28,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:28,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:28,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:28,698 INFO L87 Difference]: Start difference. First operand 571 states and 947 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:28,831 INFO L93 Difference]: Finished difference Result 1133 states and 1886 transitions. [2021-11-13 02:37:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:28,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2021-11-13 02:37:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:28,842 INFO L225 Difference]: With dead ends: 1133 [2021-11-13 02:37:28,843 INFO L226 Difference]: Without dead ends: 571 [2021-11-13 02:37:28,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:28,851 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 12 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.25ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.41ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:28,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2795 Invalid, 33 Unknown, 0 Unchecked, 17.25ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 49.41ms Time] [2021-11-13 02:37:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-13 02:37:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-13 02:37:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6852678571428572) internal successors, (755), 467 states have internal predecessors, (755), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 946 transitions. [2021-11-13 02:37:28,914 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 946 transitions. Word has length 115 [2021-11-13 02:37:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:28,916 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 946 transitions. [2021-11-13 02:37:28,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 946 transitions. [2021-11-13 02:37:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 02:37:28,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:28,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:28,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:29,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:29,156 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:29,157 INFO L85 PathProgramCache]: Analyzing trace with hash 808115478, now seen corresponding path program 1 times [2021-11-13 02:37:29,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:29,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779876853] [2021-11-13 02:37:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:29,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:29,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:29,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:29,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:37:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:29,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:37:30,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:30,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:30,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779876853] [2021-11-13 02:37:30,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779876853] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:30,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:30,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:30,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255719697] [2021-11-13 02:37:30,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:30,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:30,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:30,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:30,599 INFO L87 Difference]: Start difference. First operand 571 states and 946 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:30,719 INFO L93 Difference]: Finished difference Result 1137 states and 1889 transitions. [2021-11-13 02:37:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-13 02:37:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:30,727 INFO L225 Difference]: With dead ends: 1137 [2021-11-13 02:37:30,728 INFO L226 Difference]: Without dead ends: 577 [2021-11-13 02:37:30,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:30,734 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 13 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.35ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.05ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:30,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2795 Invalid, 35 Unknown, 0 Unchecked, 8.35ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 56.05ms Time] [2021-11-13 02:37:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-13 02:37:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-13 02:37:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 453 states have (on average 1.6777041942604856) internal successors, (760), 472 states have internal predecessors, (760), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 951 transitions. [2021-11-13 02:37:30,781 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 951 transitions. Word has length 117 [2021-11-13 02:37:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:30,782 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 951 transitions. [2021-11-13 02:37:30,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 951 transitions. [2021-11-13 02:37:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 02:37:30,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:30,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:30,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:31,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:31,016 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1483857368, now seen corresponding path program 1 times [2021-11-13 02:37:31,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:31,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303238949] [2021-11-13 02:37:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:31,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:31,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:31,020 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:31,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:37:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:31,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:37:32,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:32,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:32,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303238949] [2021-11-13 02:37:32,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303238949] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:32,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:32,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:32,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315220408] [2021-11-13 02:37:32,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:32,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:32,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:32,573 INFO L87 Difference]: Start difference. First operand 577 states and 951 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:32,666 INFO L93 Difference]: Finished difference Result 1136 states and 1880 transitions. [2021-11-13 02:37:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:32,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-13 02:37:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:32,674 INFO L225 Difference]: With dead ends: 1136 [2021-11-13 02:37:32,675 INFO L226 Difference]: Without dead ends: 577 [2021-11-13 02:37:32,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:32,680 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 8 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.47ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:32,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2796 Invalid, 30 Unknown, 0 Unchecked, 7.37ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 37.47ms Time] [2021-11-13 02:37:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-13 02:37:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-13 02:37:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 453 states have (on average 1.6754966887417218) internal successors, (759), 472 states have internal predecessors, (759), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 950 transitions. [2021-11-13 02:37:32,715 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 950 transitions. Word has length 118 [2021-11-13 02:37:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:32,716 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 950 transitions. [2021-11-13 02:37:32,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 950 transitions. [2021-11-13 02:37:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 02:37:32,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:32,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:32,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:32,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:32,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash 707607642, now seen corresponding path program 1 times [2021-11-13 02:37:32,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:32,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317403833] [2021-11-13 02:37:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:32,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:32,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:32,946 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:32,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:37:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:33,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:37:33,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:34,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:34,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317403833] [2021-11-13 02:37:34,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317403833] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:34,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:34,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:34,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671444124] [2021-11-13 02:37:34,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:34,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:34,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:34,333 INFO L87 Difference]: Start difference. First operand 577 states and 950 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:34,435 INFO L93 Difference]: Finished difference Result 1136 states and 1879 transitions. [2021-11-13 02:37:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-11-13 02:37:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:34,445 INFO L225 Difference]: With dead ends: 1136 [2021-11-13 02:37:34,445 INFO L226 Difference]: Without dead ends: 577 [2021-11-13 02:37:34,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:34,454 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 6 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.54ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.12ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:34,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2796 Invalid, 28 Unknown, 0 Unchecked, 7.54ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 43.12ms Time] [2021-11-13 02:37:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-13 02:37:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-13 02:37:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 453 states have (on average 1.6732891832229582) internal successors, (758), 472 states have internal predecessors, (758), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 949 transitions. [2021-11-13 02:37:34,491 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 949 transitions. Word has length 119 [2021-11-13 02:37:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:34,492 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 949 transitions. [2021-11-13 02:37:34,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 949 transitions. [2021-11-13 02:37:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:37:34,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:34,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:34,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:34,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:34,724 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash 151725420, now seen corresponding path program 1 times [2021-11-13 02:37:34,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:34,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022127930] [2021-11-13 02:37:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:34,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:34,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:34,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:37:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:35,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:37:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:35,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:36,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:36,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022127930] [2021-11-13 02:37:36,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022127930] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:36,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:36,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-13 02:37:36,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5234158] [2021-11-13 02:37:36,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:36,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:37:36,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:36,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:37:36,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:37:36,283 INFO L87 Difference]: Start difference. First operand 577 states and 949 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:37:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:36,570 INFO L93 Difference]: Finished difference Result 1153 states and 1907 transitions. [2021-11-13 02:37:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:37:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 120 [2021-11-13 02:37:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:36,586 INFO L225 Difference]: With dead ends: 1153 [2021-11-13 02:37:36,587 INFO L226 Difference]: Without dead ends: 598 [2021-11-13 02:37:36,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:37:36,592 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 148 mSDsluCounter, 4558 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5491 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:36,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5491 Invalid, 85 Unknown, 0 Unchecked, 13.55ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 207.98ms Time] [2021-11-13 02:37:36,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-13 02:37:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 596. [2021-11-13 02:37:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 469 states have (on average 1.671641791044776) internal successors, (784), 490 states have internal predecessors, (784), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-13 02:37:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 980 transitions. [2021-11-13 02:37:36,632 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 980 transitions. Word has length 120 [2021-11-13 02:37:36,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:36,633 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 980 transitions. [2021-11-13 02:37:36,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:37:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 980 transitions. [2021-11-13 02:37:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:37:36,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:36,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:36,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:36,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:36,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1282512045, now seen corresponding path program 1 times [2021-11-13 02:37:36,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:36,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975704475] [2021-11-13 02:37:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:36,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:36,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:36,867 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:36,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:37:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:37:37,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:37:38,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:38,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975704475] [2021-11-13 02:37:38,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975704475] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:38,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:38,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-13 02:37:38,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98288364] [2021-11-13 02:37:38,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:38,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:38,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:38,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:37:38,300 INFO L87 Difference]: Start difference. First operand 596 states and 980 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:38,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:38,402 INFO L93 Difference]: Finished difference Result 1166 states and 1929 transitions. [2021-11-13 02:37:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:38,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-13 02:37:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:38,411 INFO L225 Difference]: With dead ends: 1166 [2021-11-13 02:37:38,411 INFO L226 Difference]: Without dead ends: 592 [2021-11-13 02:37:38,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:38,416 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 8 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.45ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.90ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:38,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2795 Invalid, 30 Unknown, 0 Unchecked, 7.45ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 48.90ms Time] [2021-11-13 02:37:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-13 02:37:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-13 02:37:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 467 states have (on average 1.6723768736616702) internal successors, (781), 487 states have internal predecessors, (781), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-13 02:37:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 973 transitions. [2021-11-13 02:37:38,448 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 973 transitions. Word has length 120 [2021-11-13 02:37:38,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:38,449 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 973 transitions. [2021-11-13 02:37:38,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 973 transitions. [2021-11-13 02:37:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 02:37:38,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:38,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:38,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:38,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:38,680 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1361495761, now seen corresponding path program 1 times [2021-11-13 02:37:38,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:38,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928454110] [2021-11-13 02:37:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:38,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:38,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:38,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:38,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:37:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:39,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:39,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:37:40,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:40,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928454110] [2021-11-13 02:37:40,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928454110] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:40,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:40,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:40,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518435751] [2021-11-13 02:37:40,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:40,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:40,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:40,079 INFO L87 Difference]: Start difference. First operand 592 states and 973 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:40,335 INFO L93 Difference]: Finished difference Result 1192 states and 1974 transitions. [2021-11-13 02:37:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2021-11-13 02:37:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:40,345 INFO L225 Difference]: With dead ends: 1192 [2021-11-13 02:37:40,346 INFO L226 Difference]: Without dead ends: 592 [2021-11-13 02:37:40,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:40,351 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 134 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.31ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.48ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:40,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2603 Invalid, 131 Unknown, 0 Unchecked, 8.31ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 198.48ms Time] [2021-11-13 02:37:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-13 02:37:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-13 02:37:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 467 states have (on average 1.6616702355460387) internal successors, (776), 487 states have internal predecessors, (776), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-13 02:37:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 968 transitions. [2021-11-13 02:37:40,384 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 968 transitions. Word has length 121 [2021-11-13 02:37:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:40,384 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 968 transitions. [2021-11-13 02:37:40,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 968 transitions. [2021-11-13 02:37:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 02:37:40,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:40,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:40,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:40,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:40,607 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:40,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:40,607 INFO L85 PathProgramCache]: Analyzing trace with hash 201462795, now seen corresponding path program 1 times [2021-11-13 02:37:40,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:40,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177562295] [2021-11-13 02:37:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:40,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:40,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:40,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:40,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:37:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:41,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:37:41,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:41,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177562295] [2021-11-13 02:37:41,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177562295] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:41,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:41,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:41,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141981371] [2021-11-13 02:37:41,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:41,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:41,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:41,964 INFO L87 Difference]: Start difference. First operand 592 states and 968 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:42,222 INFO L93 Difference]: Finished difference Result 1192 states and 1964 transitions. [2021-11-13 02:37:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 123 [2021-11-13 02:37:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:42,231 INFO L225 Difference]: With dead ends: 1192 [2021-11-13 02:37:42,232 INFO L226 Difference]: Without dead ends: 592 [2021-11-13 02:37:42,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:42,237 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 128 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.86ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.24ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:42,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2603 Invalid, 121 Unknown, 0 Unchecked, 7.86ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 204.24ms Time] [2021-11-13 02:37:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-13 02:37:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-13 02:37:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 467 states have (on average 1.6509635974304069) internal successors, (771), 487 states have internal predecessors, (771), 98 states have call successors, (98), 26 states have call predecessors, (98), 26 states have return successors, (94), 91 states have call predecessors, (94), 93 states have call successors, (94) [2021-11-13 02:37:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 963 transitions. [2021-11-13 02:37:42,268 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 963 transitions. Word has length 123 [2021-11-13 02:37:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:42,269 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 963 transitions. [2021-11-13 02:37:42,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 963 transitions. [2021-11-13 02:37:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 02:37:42,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:42,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:42,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:42,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:42,491 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1430023089, now seen corresponding path program 1 times [2021-11-13 02:37:42,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:42,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817573352] [2021-11-13 02:37:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:42,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:42,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:42,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:37:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:43,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:43,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:37:43,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:43,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817573352] [2021-11-13 02:37:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817573352] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:43,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:43,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:43,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554360056] [2021-11-13 02:37:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:43,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:43,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:43,785 INFO L87 Difference]: Start difference. First operand 592 states and 963 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:44,036 INFO L93 Difference]: Finished difference Result 1213 states and 1985 transitions. [2021-11-13 02:37:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:44,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-11-13 02:37:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:44,044 INFO L225 Difference]: With dead ends: 1213 [2021-11-13 02:37:44,045 INFO L226 Difference]: Without dead ends: 622 [2021-11-13 02:37:44,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:44,050 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 143 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.21ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 186.39ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:44,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2613 Invalid, 131 Unknown, 0 Unchecked, 7.21ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 186.39ms Time] [2021-11-13 02:37:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-13 02:37:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 607. [2021-11-13 02:37:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 482 states have (on average 1.6307053941908713) internal successors, (786), 501 states have internal predecessors, (786), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 977 transitions. [2021-11-13 02:37:44,080 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 977 transitions. Word has length 125 [2021-11-13 02:37:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:44,080 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 977 transitions. [2021-11-13 02:37:44,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 977 transitions. [2021-11-13 02:37:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 02:37:44,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:44,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:44,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:44,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:44,312 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash -241041615, now seen corresponding path program 1 times [2021-11-13 02:37:44,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:44,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453148] [2021-11-13 02:37:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:44,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:44,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:44,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:37:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:37:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:45,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:45,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:45,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453148] [2021-11-13 02:37:45,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453148] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:45,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:45,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 02:37:45,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452495660] [2021-11-13 02:37:45,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:45,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:37:45,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:37:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:37:45,708 INFO L87 Difference]: Start difference. First operand 607 states and 977 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:37:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:45,919 INFO L93 Difference]: Finished difference Result 1177 states and 1906 transitions. [2021-11-13 02:37:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:37:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2021-11-13 02:37:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:45,928 INFO L225 Difference]: With dead ends: 1177 [2021-11-13 02:37:45,928 INFO L226 Difference]: Without dead ends: 601 [2021-11-13 02:37:45,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:45,933 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 131 mSDsluCounter, 4523 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5459 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.98ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:45,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5459 Invalid, 75 Unknown, 0 Unchecked, 13.98ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 148.72ms Time] [2021-11-13 02:37:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-13 02:37:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 586. [2021-11-13 02:37:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6247288503253796) internal successors, (749), 480 states have internal predecessors, (749), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 940 transitions. [2021-11-13 02:37:45,962 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 940 transitions. Word has length 125 [2021-11-13 02:37:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:45,963 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 940 transitions. [2021-11-13 02:37:45,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:37:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 940 transitions. [2021-11-13 02:37:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 02:37:45,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:45,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:45,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:46,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:46,195 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:46,195 INFO L85 PathProgramCache]: Analyzing trace with hash -899327607, now seen corresponding path program 1 times [2021-11-13 02:37:46,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:46,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352787263] [2021-11-13 02:37:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:46,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:46,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:46,197 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:46,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:37:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:46,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:47,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:37:47,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:47,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352787263] [2021-11-13 02:37:47,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352787263] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:47,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:47,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:47,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816422271] [2021-11-13 02:37:47,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:47,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:47,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:47,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:47,446 INFO L87 Difference]: Start difference. First operand 586 states and 940 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:47,596 INFO L93 Difference]: Finished difference Result 1141 states and 1844 transitions. [2021-11-13 02:37:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 126 [2021-11-13 02:37:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:47,604 INFO L225 Difference]: With dead ends: 1141 [2021-11-13 02:37:47,605 INFO L226 Difference]: Without dead ends: 586 [2021-11-13 02:37:47,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:47,610 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 69 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.43ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:47,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2627 Invalid, 54 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 108.43ms Time] [2021-11-13 02:37:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-13 02:37:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-13 02:37:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6225596529284165) internal successors, (748), 480 states have internal predecessors, (748), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 939 transitions. [2021-11-13 02:37:47,638 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 939 transitions. Word has length 126 [2021-11-13 02:37:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:47,639 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 939 transitions. [2021-11-13 02:37:47,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 939 transitions. [2021-11-13 02:37:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:37:47,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:47,644 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:47,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:47,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:47,859 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash -565796020, now seen corresponding path program 1 times [2021-11-13 02:37:47,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:47,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981003829] [2021-11-13 02:37:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:47,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:47,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:47,861 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:47,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:37:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:48,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:37:49,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:49,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981003829] [2021-11-13 02:37:49,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981003829] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:49,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:49,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:37:49,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514967093] [2021-11-13 02:37:49,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:49,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:49,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:49,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:49,151 INFO L87 Difference]: Start difference. First operand 586 states and 939 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:49,297 INFO L93 Difference]: Finished difference Result 1141 states and 1843 transitions. [2021-11-13 02:37:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 127 [2021-11-13 02:37:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:49,350 INFO L225 Difference]: With dead ends: 1141 [2021-11-13 02:37:49,351 INFO L226 Difference]: Without dead ends: 586 [2021-11-13 02:37:49,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:49,355 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 67 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:49,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2627 Invalid, 52 Unknown, 0 Unchecked, 5.85ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 105.14ms Time] [2021-11-13 02:37:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-13 02:37:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-13 02:37:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6203904555314534) internal successors, (747), 480 states have internal predecessors, (747), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 938 transitions. [2021-11-13 02:37:49,382 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 938 transitions. Word has length 127 [2021-11-13 02:37:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:49,383 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 938 transitions. [2021-11-13 02:37:49,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:37:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 938 transitions. [2021-11-13 02:37:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 02:37:49,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:49,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:49,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:49,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:49,605 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 712707716, now seen corresponding path program 1 times [2021-11-13 02:37:49,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:49,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170742208] [2021-11-13 02:37:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:49,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:49,608 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:49,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:37:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:50,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:37:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:50,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:51,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:51,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170742208] [2021-11-13 02:37:51,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170742208] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:51,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:51,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 02:37:51,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419243244] [2021-11-13 02:37:51,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:51,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:37:51,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:37:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:37:51,132 INFO L87 Difference]: Start difference. First operand 586 states and 938 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:37:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:51,473 INFO L93 Difference]: Finished difference Result 1146 states and 1850 transitions. [2021-11-13 02:37:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:37:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 128 [2021-11-13 02:37:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:51,481 INFO L225 Difference]: With dead ends: 1146 [2021-11-13 02:37:51,481 INFO L226 Difference]: Without dead ends: 597 [2021-11-13 02:37:51,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:37:51,486 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 109 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6096 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 236.21ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:51,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6096 Invalid, 152 Unknown, 0 Unchecked, 11.86ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 236.21ms Time] [2021-11-13 02:37:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-13 02:37:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 588. [2021-11-13 02:37:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 463 states have (on average 1.6155507559395248) internal successors, (748), 482 states have internal predecessors, (748), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 939 transitions. [2021-11-13 02:37:51,556 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 939 transitions. Word has length 128 [2021-11-13 02:37:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:51,557 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 939 transitions. [2021-11-13 02:37:51,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:37:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 939 transitions. [2021-11-13 02:37:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 02:37:51,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:51,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:51,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:51,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:51,778 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash -222578665, now seen corresponding path program 1 times [2021-11-13 02:37:51,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:51,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045378929] [2021-11-13 02:37:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:51,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:51,781 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:51,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:37:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:52,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:37:52,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:37:52,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:53,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:53,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045378929] [2021-11-13 02:37:53,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045378929] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:53,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:53,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-13 02:37:53,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187399045] [2021-11-13 02:37:53,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:53,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:37:53,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:53,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:37:53,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:37:53,348 INFO L87 Difference]: Start difference. First operand 588 states and 939 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, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:37:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:53,664 INFO L93 Difference]: Finished difference Result 1138 states and 1831 transitions. [2021-11-13 02:37:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:37:53,666 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, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 129 [2021-11-13 02:37:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:53,672 INFO L225 Difference]: With dead ends: 1138 [2021-11-13 02:37:53,672 INFO L226 Difference]: Without dead ends: 593 [2021-11-13 02:37:53,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:37:53,677 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 77 mSDsluCounter, 5222 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6104 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.50ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 222.51ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:53,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6104 Invalid, 152 Unknown, 0 Unchecked, 10.50ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 222.51ms Time] [2021-11-13 02:37:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-13 02:37:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 590. [2021-11-13 02:37:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 465 states have (on average 1.610752688172043) internal successors, (749), 484 states have internal predecessors, (749), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:53,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 940 transitions. [2021-11-13 02:37:53,707 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 940 transitions. Word has length 129 [2021-11-13 02:37:53,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:53,708 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 940 transitions. [2021-11-13 02:37:53,708 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, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:37:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 940 transitions. [2021-11-13 02:37:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 02:37:53,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:53,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:53,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:53,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:53,939 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:53,939 INFO L85 PathProgramCache]: Analyzing trace with hash 895859118, now seen corresponding path program 1 times [2021-11-13 02:37:53,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:53,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409436604] [2021-11-13 02:37:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:53,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:53,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:53,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:37:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:54,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:37:54,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:54,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:55,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:55,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409436604] [2021-11-13 02:37:55,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409436604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:55,269 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:55,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:37:55,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576772101] [2021-11-13 02:37:55,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:55,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:37:55,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:37:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:37:55,271 INFO L87 Difference]: Start difference. First operand 590 states and 940 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:37:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:55,525 INFO L93 Difference]: Finished difference Result 1084 states and 1758 transitions. [2021-11-13 02:37:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:37:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 130 [2021-11-13 02:37:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:55,533 INFO L225 Difference]: With dead ends: 1084 [2021-11-13 02:37:55,533 INFO L226 Difference]: Without dead ends: 583 [2021-11-13 02:37:55,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:37:55,538 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 56 mSDsluCounter, 5246 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6140 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:55,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 6140 Invalid, 88 Unknown, 0 Unchecked, 9.86ms Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 197.87ms Time] [2021-11-13 02:37:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-13 02:37:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-13 02:37:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 458 states have (on average 1.6179039301310043) internal successors, (741), 477 states have internal predecessors, (741), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 932 transitions. [2021-11-13 02:37:55,564 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 932 transitions. Word has length 130 [2021-11-13 02:37:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:55,564 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 932 transitions. [2021-11-13 02:37:55,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:37:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 932 transitions. [2021-11-13 02:37:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 02:37:55,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:55,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:55,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:55,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:55,795 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:55,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1742067535, now seen corresponding path program 1 times [2021-11-13 02:37:55,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:55,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101807347] [2021-11-13 02:37:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:55,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:55,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:55,797 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:55,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:37:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:56,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:37:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:56,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:57,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:57,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101807347] [2021-11-13 02:37:57,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101807347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:57,208 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:57,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 02:37:57,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226772794] [2021-11-13 02:37:57,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:57,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:37:57,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:57,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:37:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:37:57,211 INFO L87 Difference]: Start difference. First operand 583 states and 932 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:37:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:57,444 INFO L93 Difference]: Finished difference Result 1089 states and 1772 transitions. [2021-11-13 02:37:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:37:57,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 131 [2021-11-13 02:37:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:57,452 INFO L225 Difference]: With dead ends: 1089 [2021-11-13 02:37:57,452 INFO L226 Difference]: Without dead ends: 580 [2021-11-13 02:37:57,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:37:57,457 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 97 mSDsluCounter, 7867 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 8753 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.16ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:57,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 8753 Invalid, 116 Unknown, 0 Unchecked, 11.58ms Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 172.16ms Time] [2021-11-13 02:37:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-13 02:37:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-13 02:37:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 455 states have (on average 1.6175824175824176) internal successors, (736), 474 states have internal predecessors, (736), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 927 transitions. [2021-11-13 02:37:57,485 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 927 transitions. Word has length 131 [2021-11-13 02:37:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:57,486 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 927 transitions. [2021-11-13 02:37:57,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:37:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 927 transitions. [2021-11-13 02:37:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 02:37:57,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:57,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:57,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:57,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:57,707 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:57,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1586603313, now seen corresponding path program 1 times [2021-11-13 02:37:57,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:57,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839645722] [2021-11-13 02:37:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:57,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:57,709 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:57,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:37:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:37:58,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:58,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:37:59,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:59,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839645722] [2021-11-13 02:37:59,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839645722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:59,034 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:59,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-13 02:37:59,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547126040] [2021-11-13 02:37:59,035 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:59,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:37:59,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:59,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:37:59,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:37:59,037 INFO L87 Difference]: Start difference. First operand 580 states and 927 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-13 02:37:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:59,206 INFO L93 Difference]: Finished difference Result 1086 states and 1767 transitions. [2021-11-13 02:37:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:37:59,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 131 [2021-11-13 02:37:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:59,214 INFO L225 Difference]: With dead ends: 1086 [2021-11-13 02:37:59,214 INFO L226 Difference]: Without dead ends: 572 [2021-11-13 02:37:59,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:37:59,219 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 105 mSDsluCounter, 5205 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6090 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.04ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.67ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:59,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 6090 Invalid, 73 Unknown, 0 Unchecked, 8.04ms Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 121.67ms Time] [2021-11-13 02:37:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-13 02:37:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-13 02:37:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 447 states have (on average 1.621923937360179) internal successors, (725), 466 states have internal predecessors, (725), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:37:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 916 transitions. [2021-11-13 02:37:59,245 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 916 transitions. Word has length 131 [2021-11-13 02:37:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:59,245 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 916 transitions. [2021-11-13 02:37:59,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-13 02:37:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 916 transitions. [2021-11-13 02:37:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 02:37:59,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:59,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:59,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:59,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:59,476 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1952442830, now seen corresponding path program 1 times [2021-11-13 02:37:59,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:59,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645377612] [2021-11-13 02:37:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:59,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:59,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:59,479 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:59,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:38:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:38:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:00,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:01,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:01,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645377612] [2021-11-13 02:38:01,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645377612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:01,084 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:01,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:38:01,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100749374] [2021-11-13 02:38:01,085 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:01,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:38:01,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:38:01,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:01,089 INFO L87 Difference]: Start difference. First operand 572 states and 916 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:38:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:01,362 INFO L93 Difference]: Finished difference Result 1072 states and 1745 transitions. [2021-11-13 02:38:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:01,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 132 [2021-11-13 02:38:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:01,369 INFO L225 Difference]: With dead ends: 1072 [2021-11-13 02:38:01,370 INFO L226 Difference]: Without dead ends: 572 [2021-11-13 02:38:01,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:38:01,374 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 100 mSDsluCounter, 6969 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 7850 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.30ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.60ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:01,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 7850 Invalid, 148 Unknown, 0 Unchecked, 10.30ms Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 199.60ms Time] [2021-11-13 02:38:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-13 02:38:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-13 02:38:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 447 states have (on average 1.6196868008948546) internal successors, (724), 466 states have internal predecessors, (724), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:38:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 915 transitions. [2021-11-13 02:38:01,400 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 915 transitions. Word has length 132 [2021-11-13 02:38:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:01,401 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 915 transitions. [2021-11-13 02:38:01,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:38:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 915 transitions. [2021-11-13 02:38:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-13 02:38:01,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:01,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:01,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:01,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:01,631 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:01,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1384291407, now seen corresponding path program 1 times [2021-11-13 02:38:01,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:01,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623887432] [2021-11-13 02:38:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:01,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:01,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:01,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:01,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:38:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:38:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:02,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:03,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:03,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623887432] [2021-11-13 02:38:03,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623887432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:03,142 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:03,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:38:03,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808167542] [2021-11-13 02:38:03,142 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:03,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:38:03,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:38:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:03,144 INFO L87 Difference]: Start difference. First operand 572 states and 915 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:38:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:03,404 INFO L93 Difference]: Finished difference Result 1116 states and 1802 transitions. [2021-11-13 02:38:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:03,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 133 [2021-11-13 02:38:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:03,412 INFO L225 Difference]: With dead ends: 1116 [2021-11-13 02:38:03,412 INFO L226 Difference]: Without dead ends: 569 [2021-11-13 02:38:03,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:38:03,417 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 175 mSDsluCounter, 5182 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 6051 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.17ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 175.90ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:03,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 6051 Invalid, 116 Unknown, 0 Unchecked, 8.17ms Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 175.90ms Time] [2021-11-13 02:38:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-13 02:38:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-13 02:38:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 444 states have (on average 1.6126126126126126) internal successors, (716), 463 states have internal predecessors, (716), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:38:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 907 transitions. [2021-11-13 02:38:03,443 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 907 transitions. Word has length 133 [2021-11-13 02:38:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:03,443 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 907 transitions. [2021-11-13 02:38:03,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:38:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 907 transitions. [2021-11-13 02:38:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:38:03,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:03,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:03,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:03,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:03,675 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:03,675 INFO L85 PathProgramCache]: Analyzing trace with hash -674538985, now seen corresponding path program 1 times [2021-11-13 02:38:03,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:03,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180782714] [2021-11-13 02:38:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:03,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:03,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:03,678 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:03,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 02:38:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:04,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:38:04,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:04,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:05,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:05,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180782714] [2021-11-13 02:38:05,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180782714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:05,138 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:05,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:38:05,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740172193] [2021-11-13 02:38:05,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:05,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:38:05,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:38:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:05,140 INFO L87 Difference]: Start difference. First operand 569 states and 907 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:38:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:05,402 INFO L93 Difference]: Finished difference Result 1063 states and 1725 transitions. [2021-11-13 02:38:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:05,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 134 [2021-11-13 02:38:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:05,411 INFO L225 Difference]: With dead ends: 1063 [2021-11-13 02:38:05,411 INFO L226 Difference]: Without dead ends: 569 [2021-11-13 02:38:05,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:38:05,416 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 99 mSDsluCounter, 5181 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6051 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.03ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:05,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6051 Invalid, 115 Unknown, 0 Unchecked, 8.64ms Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 187.03ms Time] [2021-11-13 02:38:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-13 02:38:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-13 02:38:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 444 states have (on average 1.6103603603603605) internal successors, (715), 463 states have internal predecessors, (715), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:38:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 906 transitions. [2021-11-13 02:38:05,440 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 906 transitions. Word has length 134 [2021-11-13 02:38:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:05,441 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 906 transitions. [2021-11-13 02:38:05,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:38:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 906 transitions. [2021-11-13 02:38:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 02:38:05,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:05,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:05,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:05,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:05,663 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:05,663 INFO L85 PathProgramCache]: Analyzing trace with hash 428743936, now seen corresponding path program 1 times [2021-11-13 02:38:05,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:05,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748845284] [2021-11-13 02:38:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:05,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:05,665 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 02:38:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:38:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:06,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:38:07,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:07,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748845284] [2021-11-13 02:38:07,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748845284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:07,151 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:07,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-13 02:38:07,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204276021] [2021-11-13 02:38:07,151 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:07,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 02:38:07,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 02:38:07,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:38:07,153 INFO L87 Difference]: Start difference. First operand 569 states and 906 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:38:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:07,405 INFO L93 Difference]: Finished difference Result 1101 states and 1770 transitions. [2021-11-13 02:38:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:38:07,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 135 [2021-11-13 02:38:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:07,413 INFO L225 Difference]: With dead ends: 1101 [2021-11-13 02:38:07,413 INFO L226 Difference]: Without dead ends: 566 [2021-11-13 02:38:07,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:38:07,447 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 132 mSDsluCounter, 6905 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 7773 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.86ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.94ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:07,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 7773 Invalid, 146 Unknown, 0 Unchecked, 9.86ms Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 171.94ms Time] [2021-11-13 02:38:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-13 02:38:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-13 02:38:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 441 states have (on average 1.6031746031746033) internal successors, (707), 460 states have internal predecessors, (707), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-13 02:38:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 898 transitions. [2021-11-13 02:38:07,475 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 898 transitions. Word has length 135 [2021-11-13 02:38:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:07,476 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 898 transitions. [2021-11-13 02:38:07,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 02:38:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 898 transitions. [2021-11-13 02:38:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 02:38:07,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:07,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:07,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:07,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:07,695 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash -960789316, now seen corresponding path program 1 times [2021-11-13 02:38:07,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:07,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332826587] [2021-11-13 02:38:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:07,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:07,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:07,699 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:07,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 02:38:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 02:38:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:38:09,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:38:10,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:10,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332826587] [2021-11-13 02:38:10,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332826587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:10,240 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:10,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-13 02:38:10,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590728363] [2021-11-13 02:38:10,241 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:10,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:38:10,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:10,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:38:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:38:10,243 INFO L87 Difference]: Start difference. First operand 566 states and 898 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-13 02:38:12,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:14,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:16,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:18,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:24,322 INFO L93 Difference]: Finished difference Result 1191 states and 1963 transitions. [2021-11-13 02:38:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:38:24,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) Word has length 136 [2021-11-13 02:38:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:24,330 INFO L225 Difference]: With dead ends: 1191 [2021-11-13 02:38:24,330 INFO L226 Difference]: Without dead ends: 705 [2021-11-13 02:38:24,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:38:24,335 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 2115 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 4151 mSolverCounterSat, 767 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13085.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2115 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 4922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.22ms SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 4151 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13818.17ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:24,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2115 Valid, 3335 Invalid, 4922 Unknown, 0 Unchecked, 40.22ms Time], IncrementalHoareTripleChecker [767 Valid, 4151 Invalid, 4 Unknown, 0 Unchecked, 13818.17ms Time] [2021-11-13 02:38:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-13 02:38:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 570. [2021-11-13 02:38:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 444 states have (on average 1.5990990990990992) internal successors, (710), 463 states have internal predecessors, (710), 98 states have call successors, (98), 27 states have call predecessors, (98), 27 states have return successors, (109), 92 states have call predecessors, (109), 93 states have call successors, (109) [2021-11-13 02:38:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 917 transitions. [2021-11-13 02:38:24,419 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 917 transitions. Word has length 136 [2021-11-13 02:38:24,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:24,420 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 917 transitions. [2021-11-13 02:38:24,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-13 02:38:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 917 transitions. [2021-11-13 02:38:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 02:38:24,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:24,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:24,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:24,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:24,643 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash -536897086, now seen corresponding path program 1 times [2021-11-13 02:38:24,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:24,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358533477] [2021-11-13 02:38:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:24,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:24,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:24,646 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:24,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 02:38:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:38:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:38:25,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:38:26,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:26,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358533477] [2021-11-13 02:38:26,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358533477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:26,336 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:26,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-13 02:38:26,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091218700] [2021-11-13 02:38:26,336 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:26,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:38:26,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:38:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:38:26,338 INFO L87 Difference]: Start difference. First operand 570 states and 917 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-13 02:38:28,361 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:30,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:37,627 INFO L93 Difference]: Finished difference Result 1994 states and 3378 transitions. [2021-11-13 02:38:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 02:38:37,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) Word has length 137 [2021-11-13 02:38:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:37,639 INFO L225 Difference]: With dead ends: 1994 [2021-11-13 02:38:37,639 INFO L226 Difference]: Without dead ends: 1504 [2021-11-13 02:38:37,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:38:37,645 INFO L933 BasicCegarLoop]: 1464 mSDtfsCounter, 4888 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 4027 mSolverCounterSat, 1457 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9876.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4972 SdHoareTripleChecker+Valid, 2866 SdHoareTripleChecker+Invalid, 5486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.64ms SdHoareTripleChecker+Time, 1457 IncrementalHoareTripleChecker+Valid, 4027 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10874.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:37,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4972 Valid, 2866 Invalid, 5486 Unknown, 0 Unchecked, 44.64ms Time], IncrementalHoareTripleChecker [1457 Valid, 4027 Invalid, 2 Unknown, 0 Unchecked, 10874.62ms Time] [2021-11-13 02:38:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-11-13 02:38:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1415. [2021-11-13 02:38:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1095 states have (on average 1.63013698630137) internal successors, (1785), 1143 states have internal predecessors, (1785), 252 states have call successors, (252), 66 states have call predecessors, (252), 67 states have return successors, (276), 242 states have call predecessors, (276), 247 states have call successors, (276) [2021-11-13 02:38:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2313 transitions. [2021-11-13 02:38:37,740 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2313 transitions. Word has length 137 [2021-11-13 02:38:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:37,741 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 2313 transitions. [2021-11-13 02:38:37,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 5 states have call successors, (21) [2021-11-13 02:38:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2313 transitions. [2021-11-13 02:38:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 02:38:37,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:37,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:37,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:37,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:37,959 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1351053052, now seen corresponding path program 1 times [2021-11-13 02:38:37,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:37,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048559365] [2021-11-13 02:38:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:37,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:37,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:37,962 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:37,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 02:38:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:38,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:38:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:38:41,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:38:45,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:45,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048559365] [2021-11-13 02:38:45,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048559365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:45,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:45,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-13 02:38:45,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932984369] [2021-11-13 02:38:45,463 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:45,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:38:45,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:38:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:38:45,465 INFO L87 Difference]: Start difference. First operand 1415 states and 2313 transitions. Second operand has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-13 02:38:47,493 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:49,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:51,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:53,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:55,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:21,593 INFO L93 Difference]: Finished difference Result 4682 states and 7830 transitions. [2021-11-13 02:39:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:39:21,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 139 [2021-11-13 02:39:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:21,619 INFO L225 Difference]: With dead ends: 4682 [2021-11-13 02:39:21,619 INFO L226 Difference]: Without dead ends: 3347 [2021-11-13 02:39:21,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:39:21,627 INFO L933 BasicCegarLoop]: 1055 mSDtfsCounter, 2776 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 4963 mSolverCounterSat, 705 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30963.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2847 SdHoareTripleChecker+Valid, 3143 SdHoareTripleChecker+Invalid, 5673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.45ms SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 4963 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35435.25ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:21,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2847 Valid, 3143 Invalid, 5673 Unknown, 0 Unchecked, 43.45ms Time], IncrementalHoareTripleChecker [705 Valid, 4963 Invalid, 5 Unknown, 0 Unchecked, 35435.25ms Time] [2021-11-13 02:39:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2021-11-13 02:39:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 2935. [2021-11-13 02:39:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2238 states have (on average 1.6394101876675604) internal successors, (3669), 2336 states have internal predecessors, (3669), 577 states have call successors, (577), 114 states have call predecessors, (577), 119 states have return successors, (634), 543 states have call predecessors, (634), 572 states have call successors, (634) [2021-11-13 02:39:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 4880 transitions. [2021-11-13 02:39:21,863 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 4880 transitions. Word has length 139 [2021-11-13 02:39:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:21,864 INFO L470 AbstractCegarLoop]: Abstraction has 2935 states and 4880 transitions. [2021-11-13 02:39:21,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-13 02:39:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 4880 transitions. [2021-11-13 02:39:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:39:21,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:21,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:21,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:22,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:22,083 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:22,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1708519561, now seen corresponding path program 1 times [2021-11-13 02:39:22,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:22,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822064750] [2021-11-13 02:39:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:22,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:22,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:22,086 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:22,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 02:39:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:22,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:39:22,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:39:23,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:39:24,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:24,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822064750] [2021-11-13 02:39:24,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822064750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:24,136 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:24,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-13 02:39:24,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570385565] [2021-11-13 02:39:24,137 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:24,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:39:24,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:39:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:39:24,139 INFO L87 Difference]: Start difference. First operand 2935 states and 4880 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:39:26,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:28,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:30,189 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:32,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:47,192 INFO L93 Difference]: Finished difference Result 11156 states and 19225 transitions. [2021-11-13 02:39:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:39:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) Word has length 143 [2021-11-13 02:39:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:47,254 INFO L225 Difference]: With dead ends: 11156 [2021-11-13 02:39:47,254 INFO L226 Difference]: Without dead ends: 8301 [2021-11-13 02:39:47,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-13 02:39:47,275 INFO L933 BasicCegarLoop]: 1932 mSDtfsCounter, 4212 mSDsluCounter, 3995 mSDsCounter, 0 mSdLazyCounter, 9712 mSolverCounterSat, 1908 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20426.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4319 SdHoareTripleChecker+Valid, 5927 SdHoareTripleChecker+Invalid, 11624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 71.46ms SdHoareTripleChecker+Time, 1908 IncrementalHoareTripleChecker+Valid, 9712 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22107.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:47,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4319 Valid, 5927 Invalid, 11624 Unknown, 0 Unchecked, 71.46ms Time], IncrementalHoareTripleChecker [1908 Valid, 9712 Invalid, 4 Unknown, 0 Unchecked, 22107.92ms Time] [2021-11-13 02:39:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-11-13 02:39:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 4991. [2021-11-13 02:39:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4991 states, 3674 states have (on average 1.6235710397387044) internal successors, (5965), 3882 states have internal predecessors, (5965), 1114 states have call successors, (1114), 172 states have call predecessors, (1114), 202 states have return successors, (1295), 1090 states have call predecessors, (1295), 1109 states have call successors, (1295) [2021-11-13 02:39:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4991 states to 4991 states and 8374 transitions. [2021-11-13 02:39:47,801 INFO L78 Accepts]: Start accepts. Automaton has 4991 states and 8374 transitions. Word has length 143 [2021-11-13 02:39:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:47,802 INFO L470 AbstractCegarLoop]: Abstraction has 4991 states and 8374 transitions. [2021-11-13 02:39:47,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:39:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4991 states and 8374 transitions. [2021-11-13 02:39:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 02:39:47,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:47,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:47,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-13 02:39:48,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:48,032 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash -806898816, now seen corresponding path program 1 times [2021-11-13 02:39:48,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:48,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382595925] [2021-11-13 02:39:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:48,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:48,036 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:48,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-13 02:39:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:48,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:39:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:39:49,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:39:49,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:49,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382595925] [2021-11-13 02:39:49,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382595925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:49,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:39:49,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:39:49,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009117923] [2021-11-13 02:39:49,831 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:49,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:39:49,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:39:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:39:49,833 INFO L87 Difference]: Start difference. First operand 4991 states and 8374 transitions. Second operand has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:39:51,857 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:53,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:59,774 INFO L93 Difference]: Finished difference Result 18003 states and 31177 transitions. [2021-11-13 02:39:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:39:59,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 144 [2021-11-13 02:39:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:59,885 INFO L225 Difference]: With dead ends: 18003 [2021-11-13 02:39:59,886 INFO L226 Difference]: Without dead ends: 13095 [2021-11-13 02:39:59,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:39:59,965 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 4315 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 1483 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8205.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4421 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 4191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.17ms SdHoareTripleChecker+Time, 1483 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8928.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:59,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4421 Valid, 3021 Invalid, 4191 Unknown, 0 Unchecked, 26.17ms Time], IncrementalHoareTripleChecker [1483 Valid, 2706 Invalid, 2 Unknown, 0 Unchecked, 8928.34ms Time] [2021-11-13 02:39:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-11-13 02:40:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 10438. [2021-11-13 02:40:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 7309 states have (on average 1.6088384183882884) internal successors, (11759), 7823 states have internal predecessors, (11759), 2759 states have call successors, (2759), 288 states have call predecessors, (2759), 369 states have return successors, (3343), 2755 states have call predecessors, (3343), 2754 states have call successors, (3343) [2021-11-13 02:40:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 17861 transitions. [2021-11-13 02:40:01,383 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 17861 transitions. Word has length 144 [2021-11-13 02:40:01,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:01,384 INFO L470 AbstractCegarLoop]: Abstraction has 10438 states and 17861 transitions. [2021-11-13 02:40:01,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:40:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 17861 transitions. [2021-11-13 02:40:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:40:01,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:01,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:01,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:01,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:01,611 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:01,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1833125652, now seen corresponding path program 1 times [2021-11-13 02:40:01,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:01,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611363621] [2021-11-13 02:40:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:01,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:01,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:01,614 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:01,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 02:40:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:40:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:40:02,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:40:03,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:03,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611363621] [2021-11-13 02:40:03,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611363621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:03,315 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:03,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:40:03,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947012050] [2021-11-13 02:40:03,316 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:03,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:40:03,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:03,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:40:03,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:40:03,317 INFO L87 Difference]: Start difference. First operand 10438 states and 17861 transitions. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:40:05,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:13,693 INFO L93 Difference]: Finished difference Result 43490 states and 76932 transitions. [2021-11-13 02:40:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:40:13,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 145 [2021-11-13 02:40:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:13,993 INFO L225 Difference]: With dead ends: 43490 [2021-11-13 02:40:13,993 INFO L226 Difference]: Without dead ends: 33137 [2021-11-13 02:40:14,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:40:14,076 INFO L933 BasicCegarLoop]: 1752 mSDtfsCounter, 4316 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 1484 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6654.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4423 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 4789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.45ms SdHoareTripleChecker+Time, 1484 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7429.51ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:14,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4423 Valid, 3072 Invalid, 4789 Unknown, 0 Unchecked, 28.45ms Time], IncrementalHoareTripleChecker [1484 Valid, 3304 Invalid, 1 Unknown, 0 Unchecked, 7429.51ms Time] [2021-11-13 02:40:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33137 states. [2021-11-13 02:40:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33137 to 26551. [2021-11-13 02:40:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26551 states, 17643 states have (on average 1.5945134047497591) internal successors, (28132), 19078 states have internal predecessors, (28132), 8152 states have call successors, (8152), 520 states have call predecessors, (8152), 755 states have return successors, (10347), 8236 states have call predecessors, (10347), 8147 states have call successors, (10347) [2021-11-13 02:40:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26551 states to 26551 states and 46631 transitions. [2021-11-13 02:40:18,073 INFO L78 Accepts]: Start accepts. Automaton has 26551 states and 46631 transitions. Word has length 145 [2021-11-13 02:40:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:18,074 INFO L470 AbstractCegarLoop]: Abstraction has 26551 states and 46631 transitions. [2021-11-13 02:40:18,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:40:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 26551 states and 46631 transitions. [2021-11-13 02:40:18,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:40:18,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:18,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:18,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:18,299 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash 799812997, now seen corresponding path program 1 times [2021-11-13 02:40:18,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:18,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420760029] [2021-11-13 02:40:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:18,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:18,303 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:18,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-13 02:40:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:19,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:40:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:40:19,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:40:20,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:20,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420760029] [2021-11-13 02:40:20,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420760029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:20,254 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:20,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:40:20,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002310325] [2021-11-13 02:40:20,255 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:20,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:40:20,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:20,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:40:20,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:40:20,257 INFO L87 Difference]: Start difference. First operand 26551 states and 46631 transitions. Second operand has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:40:22,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:38,224 INFO L93 Difference]: Finished difference Result 123549 states and 223544 transitions. [2021-11-13 02:40:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:40:38,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 146 [2021-11-13 02:40:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:39,377 INFO L225 Difference]: With dead ends: 123549 [2021-11-13 02:40:39,377 INFO L226 Difference]: Without dead ends: 97087 [2021-11-13 02:40:39,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:40:39,525 INFO L933 BasicCegarLoop]: 1760 mSDtfsCounter, 4327 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 3309 mSolverCounterSat, 1487 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6669.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4435 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 4797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.58ms SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 3309 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7407.21ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:39,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4435 Valid, 3085 Invalid, 4797 Unknown, 0 Unchecked, 28.58ms Time], IncrementalHoareTripleChecker [1487 Valid, 3309 Invalid, 1 Unknown, 0 Unchecked, 7407.21ms Time] [2021-11-13 02:40:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97087 states. [2021-11-13 02:40:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97087 to 78400. [2021-11-13 02:40:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78400 states, 50081 states have (on average 1.5847327329725844) internal successors, (79365), 54437 states have internal predecessors, (79365), 26589 states have call successors, (26589), 984 states have call predecessors, (26589), 1729 states have return successors, (35497), 27041 states have call predecessors, (35497), 26584 states have call successors, (35497) [2021-11-13 02:40:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78400 states to 78400 states and 141451 transitions. [2021-11-13 02:40:50,926 INFO L78 Accepts]: Start accepts. Automaton has 78400 states and 141451 transitions. Word has length 146 [2021-11-13 02:40:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:50,927 INFO L470 AbstractCegarLoop]: Abstraction has 78400 states and 141451 transitions. [2021-11-13 02:40:50,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:40:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 78400 states and 141451 transitions. [2021-11-13 02:40:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:40:50,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:50,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:50,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:51,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:51,147 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash 902764689, now seen corresponding path program 1 times [2021-11-13 02:40:51,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:51,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040539226] [2021-11-13 02:40:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:51,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:51,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:51,149 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:51,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f380ed8-462c-49f2-a812-df4bbfe50cc2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 02:40:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:40:51,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:40:52,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:40:52,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:52,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040539226] [2021-11-13 02:40:52,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040539226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:52,857 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:40:52,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 02:40:52,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703859100] [2021-11-13 02:40:52,857 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:52,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:40:52,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:52,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:40:52,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:40:52,859 INFO L87 Difference]: Start difference. First operand 78400 states and 141451 transitions. Second operand has 8 states, 8 states have (on average 23.125) internal successors, (185), 8 states have internal predecessors, (185), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-13 02:40:54,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:56,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []