./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/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 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:38,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:38,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:38,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:38,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:38,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:38,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:38,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:38,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:38,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:38,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:38,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:38,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:38,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:38,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:38,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:38,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:38,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:38,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:38,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:38,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:38,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:38,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:38,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:38,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:38,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:38,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:38,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:38,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:38,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:38,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:38,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:38,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:38,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:38,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:38,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:38,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:38,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:38,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:38,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:38,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:38,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:53:38,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:38,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:38,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:38,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:38,156 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:38,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:38,157 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:38,157 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:53:38,157 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:38,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:38,158 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:53:38,158 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:53:38,158 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:38,158 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:53:38,159 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:53:38,159 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:53:38,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:38,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:38,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:53:38,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:38,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:38,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:38,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:38,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:38,162 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:38,162 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:38,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:38,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:38,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:38,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:38,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:38,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:38,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:38,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:38,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:38,164 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:53:38,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:53:38,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:38,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:38,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:38,166 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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 [2021-11-12 22:53:38,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:38,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:38,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:38,477 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:38,478 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:38,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2021-11-12 22:53:38,572 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data/c05e9107c/cfe5c373817c4004944cd8f157b8a2d4/FLAG6bf75f889 [2021-11-12 22:53:39,191 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:39,195 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2021-11-12 22:53:39,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data/c05e9107c/cfe5c373817c4004944cd8f157b8a2d4/FLAG6bf75f889 [2021-11-12 22:53:39,434 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data/c05e9107c/cfe5c373817c4004944cd8f157b8a2d4 [2021-11-12 22:53:39,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:39,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:39,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:39,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:39,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:39,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:39" (1/1) ... [2021-11-12 22:53:39,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b16a53c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:39, skipping insertion in model container [2021-11-12 22:53:39,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:39" (1/1) ... [2021-11-12 22:53:39,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:39,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:39,895 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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2021-11-12 22:53:40,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:40,461 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:53:40,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6687e4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:40, skipping insertion in model container [2021-11-12 22:53:40,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:40,463 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:53:40,467 INFO L158 Benchmark]: Toolchain (without parser) took 1023.83ms. Allocated memory was 81.8MB in the beginning and 125.8MB in the end (delta: 44.0MB). Free memory was 46.1MB in the beginning and 85.8MB in the end (delta: -39.6MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2021-11-12 22:53:40,468 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 81.8MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 27.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:53:40,471 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1018.74ms. Allocated memory was 81.8MB in the beginning and 125.8MB in the end (delta: 44.0MB). Free memory was 46.0MB in the beginning and 86.4MB in the end (delta: -40.4MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2021-11-12 22:53:40,474 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 81.8MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 27.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1018.74ms. Allocated memory was 81.8MB in the beginning and 125.8MB in the end (delta: 44.0MB). Free memory was 46.0MB in the beginning and 86.4MB in the end (delta: -40.4MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 441]: 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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/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 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:53:42,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:53:42,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:53:42,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:53:42,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:53:42,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:53:42,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:53:42,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:53:42,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:53:43,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:53:43,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:53:43,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:53:43,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:53:43,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:53:43,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:53:43,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:53:43,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:53:43,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:53:43,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:53:43,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:53:43,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:53:43,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:53:43,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:53:43,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:53:43,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:53:43,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:53:43,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:53:43,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:53:43,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:53:43,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:53:43,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:53:43,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:53:43,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:53:43,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:53:43,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:53:43,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:53:43,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:53:43,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:53:43,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:53:43,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:53:43,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:53:43,065 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:53:43,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:53:43,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:53:43,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:53:43,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:53:43,108 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:53:43,109 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:53:43,109 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:53:43,109 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:53:43,109 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:53:43,109 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:53:43,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:53:43,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:53:43,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:53:43,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:53:43,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:53:43,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:53:43,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:53:43,112 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:53:43,112 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:53:43,112 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:53:43,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:53:43,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:53:43,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:53:43,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:53:43,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:53:43,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:53:43,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:53:43,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:43,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:53:43,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:53:43,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:53:43,115 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:53:43,115 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:43,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:53:43,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:53:43,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:53:43,116 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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 [2021-11-12 22:53:43,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:53:43,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:53:43,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:53:43,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:53:43,508 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:53:43,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2021-11-12 22:53:43,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data/58648d107/50d03d9de87e40b298cfa44213a0d6ba/FLAG67c6ec810 [2021-11-12 22:53:44,261 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:53:44,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2021-11-12 22:53:44,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data/58648d107/50d03d9de87e40b298cfa44213a0d6ba/FLAG67c6ec810 [2021-11-12 22:53:44,429 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/data/58648d107/50d03d9de87e40b298cfa44213a0d6ba [2021-11-12 22:53:44,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:53:44,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:53:44,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:44,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:53:44,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:53:44,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:44" (1/1) ... [2021-11-12 22:53:44,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660aa7fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:44, skipping insertion in model container [2021-11-12 22:53:44,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:53:44" (1/1) ... [2021-11-12 22:53:44,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:53:44,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:44,939 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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2021-11-12 22:53:45,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:45,292 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:53:45,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:53:45,341 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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2021-11-12 22:53:45,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:45,435 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:53:45,456 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_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2021-11-12 22:53:45,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:53:45,579 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:53:45,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45 WrapperNode [2021-11-12 22:53:45,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:53:45,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:45,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:53:45,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:53:45,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:53:45,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:53:45,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:53:45,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:53:45,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:53:45,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:53:45,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:53:45,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:53:45,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (1/1) ... [2021-11-12 22:53:45,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:53:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:45,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:53:45,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:53:45,960 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-12 22:53:45,960 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-12 22:53:45,960 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-12 22:53:45,960 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-12 22:53:45,960 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-12 22:53:45,961 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-12 22:53:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-12 22:53:45,961 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-12 22:53:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-12 22:53:45,961 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-12 22:53:45,961 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-12 22:53:45,962 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-12 22:53:45,962 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-12 22:53:45,962 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-12 22:53:45,962 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-12 22:53:45,962 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-12 22:53:45,962 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-12 22:53:45,963 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-12 22:53:45,963 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-12 22:53:45,963 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-12 22:53:45,963 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-12 22:53:45,963 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-12 22:53:45,964 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-12 22:53:45,964 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-12 22:53:45,964 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-12 22:53:45,964 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-12 22:53:45,964 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-12 22:53:45,964 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-12 22:53:45,965 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-12 22:53:45,965 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-12 22:53:45,965 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-12 22:53:45,965 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-12 22:53:45,965 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-12 22:53:45,965 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-12 22:53:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-12 22:53:45,966 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-12 22:53:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-12 22:53:45,966 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-12 22:53:45,966 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-12 22:53:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-12 22:53:45,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-12 22:53:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-12 22:53:45,967 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-12 22:53:45,967 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-12 22:53:45,967 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-12 22:53:45,968 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-12 22:53:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-12 22:53:45,968 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-12 22:53:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-12 22:53:45,968 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-12 22:53:45,968 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-12 22:53:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:53:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-12 22:53:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-12 22:53:45,969 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-12 22:53:45,969 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-12 22:53:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-12 22:53:45,970 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-12 22:53:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-12 22:53:45,970 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-12 22:53:45,970 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-12 22:53:45,970 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-12 22:53:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:53:45,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:53:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-12 22:53:45,971 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-12 22:53:45,971 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-12 22:53:45,971 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-12 22:53:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:53:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-12 22:53:45,972 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-12 22:53:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-12 22:53:45,972 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-12 22:53:45,972 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-12 22:53:45,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-12 22:53:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-12 22:53:45,973 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-12 22:53:45,973 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-12 22:53:45,973 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-12 22:53:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-12 22:53:45,974 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-12 22:53:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-12 22:53:45,974 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-12 22:53:45,974 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-12 22:53:45,974 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-12 22:53:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-12 22:53:45,975 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-12 22:53:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-12 22:53:45,975 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-12 22:53:45,975 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-12 22:53:45,975 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-12 22:53:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:53:45,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:53:50,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:53:50,216 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:53:50,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:50 BoogieIcfgContainer [2021-11-12 22:53:50,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:53:50,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:53:50,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:53:50,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:53:50,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:53:44" (1/3) ... [2021-11-12 22:53:50,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3095ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:50, skipping insertion in model container [2021-11-12 22:53:50,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:53:45" (2/3) ... [2021-11-12 22:53:50,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3095ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:53:50, skipping insertion in model container [2021-11-12 22:53:50,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:53:50" (3/3) ... [2021-11-12 22:53:50,231 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_productSimulator.cil.c [2021-11-12 22:53:50,237 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:53:50,237 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:53:50,304 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:53:50,310 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:53:50,310 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:53:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 614 states, 453 states have (on average 1.5121412803532008) internal successors, (685), 475 states have internal predecessors, (685), 115 states have call successors, (115), 44 states have call predecessors, (115), 44 states have return successors, (115), 113 states have call predecessors, (115), 115 states have call successors, (115) [2021-11-12 22:53:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 22:53:50,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:50,396 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:50,396 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1093087284, now seen corresponding path program 1 times [2021-11-12 22:53:50,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:50,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450927046] [2021-11-12 22:53:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:50,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:50,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:50,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:50,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:53:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:50,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:53:51,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:51,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:51,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:51,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450927046] [2021-11-12 22:53:51,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450927046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:51,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:51,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:53:51,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128368386] [2021-11-12 22:53:51,727 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:51,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:53:51,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:53:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:53:51,762 INFO L87 Difference]: Start difference. First operand has 614 states, 453 states have (on average 1.5121412803532008) internal successors, (685), 475 states have internal predecessors, (685), 115 states have call successors, (115), 44 states have call predecessors, (115), 44 states have return successors, (115), 113 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 22:53:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:51,842 INFO L93 Difference]: Finished difference Result 958 states and 1411 transitions. [2021-11-12 22:53:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:53:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 152 [2021-11-12 22:53:51,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:51,866 INFO L225 Difference]: With dead ends: 958 [2021-11-12 22:53:51,866 INFO L226 Difference]: Without dead ends: 606 [2021-11-12 22:53:51,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:53:51,878 INFO L933 BasicCegarLoop]: 909 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, 909 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:51,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 6.92ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:53:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-12 22:53:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2021-11-12 22:53:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 447 states have (on average 1.5078299776286352) internal successors, (674), 467 states have internal predecessors, (674), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-12 22:53:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 901 transitions. [2021-11-12 22:53:51,973 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 901 transitions. Word has length 152 [2021-11-12 22:53:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:51,975 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 901 transitions. [2021-11-12 22:53:51,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-12 22:53:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 901 transitions. [2021-11-12 22:53:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-12 22:53:51,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:51,985 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:52,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 22:53:52,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:52,200 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:52,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1753524556, now seen corresponding path program 1 times [2021-11-12 22:53:52,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:52,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209086208] [2021-11-12 22:53:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:52,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:52,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:52,204 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:52,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:53:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:52,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:53:52,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:53,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:53,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:53,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209086208] [2021-11-12 22:53:53,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209086208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:53,552 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:53,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 22:53:53,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490248494] [2021-11-12 22:53:53,558 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:53,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:53,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:53,565 INFO L87 Difference]: Start difference. First operand 606 states and 901 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:53:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:53,700 INFO L93 Difference]: Finished difference Result 1176 states and 1746 transitions. [2021-11-12 22:53:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:53:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 153 [2021-11-12 22:53:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:53,714 INFO L225 Difference]: With dead ends: 1176 [2021-11-12 22:53:53,715 INFO L226 Difference]: Without dead ends: 606 [2021-11-12 22:53:53,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:53:53,719 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 3 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.28ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:53,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3585 Invalid, 18 Unknown, 0 Unchecked, 26.28ms Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 18.51ms Time] [2021-11-12 22:53:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-12 22:53:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2021-11-12 22:53:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 447 states have (on average 1.4921700223713648) internal successors, (667), 467 states have internal predecessors, (667), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-12 22:53:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 894 transitions. [2021-11-12 22:53:53,806 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 894 transitions. Word has length 153 [2021-11-12 22:53:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:53,807 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 894 transitions. [2021-11-12 22:53:53,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:53:53,808 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 894 transitions. [2021-11-12 22:53:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 22:53:53,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:53,816 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:53,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:54,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:54,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash 669699045, now seen corresponding path program 1 times [2021-11-12 22:53:54,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:54,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744160165] [2021-11-12 22:53:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:54,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:54,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:54,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:53:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:54,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:54,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 22:53:54,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:53:55,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:55,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744160165] [2021-11-12 22:53:55,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744160165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:55,190 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:55,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:53:55,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443257006] [2021-11-12 22:53:55,192 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:55,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:53:55,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:55,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:53:55,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:53:55,196 INFO L87 Difference]: Start difference. First operand 606 states and 894 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-12 22:53:57,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:59,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:59,319 INFO L93 Difference]: Finished difference Result 1182 states and 1759 transitions. [2021-11-12 22:53:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) Word has length 158 [2021-11-12 22:53:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:59,325 INFO L225 Difference]: With dead ends: 1182 [2021-11-12 22:53:59,325 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 22:53:59,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:53:59,329 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 855 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4045.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.09ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4066.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:59,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 919 Invalid, 13 Unknown, 0 Unchecked, 5.09ms Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 2 Unknown, 0 Unchecked, 4066.45ms Time] [2021-11-12 22:53:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 22:53:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-12 22:53:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 449 states have (on average 1.4810690423162582) internal successors, (665), 467 states have internal predecessors, (665), 113 states have call successors, (113), 45 states have call predecessors, (113), 44 states have return successors, (110), 109 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-12 22:53:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 888 transitions. [2021-11-12 22:53:59,364 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 888 transitions. Word has length 158 [2021-11-12 22:53:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:59,365 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 888 transitions. [2021-11-12 22:53:59,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-12 22:53:59,365 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 888 transitions. [2021-11-12 22:53:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-12 22:53:59,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:59,370 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:59,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:53:59,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:59,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2023754000, now seen corresponding path program 1 times [2021-11-12 22:53:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:59,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133371921] [2021-11-12 22:53:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:59,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:59,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:59,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:54:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:00,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-12 22:54:00,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:54:01,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:01,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133371921] [2021-11-12 22:54:01,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133371921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:01,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:01,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:01,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814076140] [2021-11-12 22:54:01,061 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:01,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:01,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:01,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:01,067 INFO L87 Difference]: Start difference. First operand 607 states and 888 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-12 22:54:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:01,185 INFO L93 Difference]: Finished difference Result 1464 states and 2153 transitions. [2021-11-12 22:54:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:01,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 189 [2021-11-12 22:54:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:01,196 INFO L225 Difference]: With dead ends: 1464 [2021-11-12 22:54:01,196 INFO L226 Difference]: Without dead ends: 608 [2021-11-12 22:54:01,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:01,202 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 705 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.55ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:01,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 1861 Invalid, 11 Unknown, 0 Unchecked, 8.55ms Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 52.89ms Time] [2021-11-12 22:54:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-12 22:54:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2021-11-12 22:54:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 451 states have (on average 1.4722838137472283) internal successors, (664), 467 states have internal predecessors, (664), 111 states have call successors, (111), 46 states have call predecessors, (111), 45 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 22:54:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 883 transitions. [2021-11-12 22:54:01,241 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 883 transitions. Word has length 189 [2021-11-12 22:54:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:01,242 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 883 transitions. [2021-11-12 22:54:01,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-12 22:54:01,243 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 883 transitions. [2021-11-12 22:54:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 22:54:01,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:01,247 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:01,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:01,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:01,465 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:01,465 INFO L85 PathProgramCache]: Analyzing trace with hash -41686357, now seen corresponding path program 1 times [2021-11-12 22:54:01,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:01,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038345047] [2021-11-12 22:54:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:01,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:01,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:01,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:01,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:54:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:01,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:01,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:54:02,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 22:54:02,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:02,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038345047] [2021-11-12 22:54:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038345047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:02,673 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:02,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:02,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274374448] [2021-11-12 22:54:02,674 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:02,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:02,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:02,675 INFO L87 Difference]: Start difference. First operand 608 states and 883 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-12 22:54:04,709 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:04,799 INFO L93 Difference]: Finished difference Result 1170 states and 1706 transitions. [2021-11-12 22:54:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:04,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 169 [2021-11-12 22:54:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:04,805 INFO L225 Difference]: With dead ends: 1170 [2021-11-12 22:54:04,805 INFO L226 Difference]: Without dead ends: 611 [2021-11-12 22:54:04,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:04,808 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 818 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2053.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.89ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2079.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:04,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 897 Invalid, 25 Unknown, 0 Unchecked, 3.89ms Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 2079.89ms Time] [2021-11-12 22:54:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-12 22:54:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 605. [2021-11-12 22:54:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 451 states have (on average 1.4478935698447895) internal successors, (653), 462 states have internal predecessors, (653), 108 states have call successors, (108), 46 states have call predecessors, (108), 45 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:54:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 866 transitions. [2021-11-12 22:54:04,844 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 866 transitions. Word has length 169 [2021-11-12 22:54:04,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:04,844 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 866 transitions. [2021-11-12 22:54:04,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-12 22:54:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 866 transitions. [2021-11-12 22:54:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-12 22:54:04,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:04,849 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:04,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:05,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:05,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -498477064, now seen corresponding path program 1 times [2021-11-12 22:54:05,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:05,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701071985] [2021-11-12 22:54:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:05,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:05,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:05,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:54:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:05,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:54:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 22:54:06,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 22:54:06,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:06,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701071985] [2021-11-12 22:54:06,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701071985] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:06,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:06,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-11-12 22:54:06,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187688153] [2021-11-12 22:54:06,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:06,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:54:06,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:06,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:54:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:06,613 INFO L87 Difference]: Start difference. First operand 605 states and 866 transitions. Second operand has 8 states, 6 states have (on average 18.666666666666668) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:54:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:06,891 INFO L93 Difference]: Finished difference Result 1154 states and 1667 transitions. [2021-11-12 22:54:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:54:06,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.666666666666668) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) Word has length 194 [2021-11-12 22:54:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:06,897 INFO L225 Difference]: With dead ends: 1154 [2021-11-12 22:54:06,897 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 22:54:06,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:54:06,900 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 363 mSDsluCounter, 4697 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 5548 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.69ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:06,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 5548 Invalid, 119 Unknown, 0 Unchecked, 13.69ms Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 167.61ms Time] [2021-11-12 22:54:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 22:54:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-12 22:54:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 452 states have (on average 1.4469026548672566) internal successors, (654), 464 states have internal predecessors, (654), 108 states have call successors, (108), 46 states have call predecessors, (108), 46 states have return successors, (107), 104 states have call predecessors, (107), 105 states have call successors, (107) [2021-11-12 22:54:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 869 transitions. [2021-11-12 22:54:06,939 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 869 transitions. Word has length 194 [2021-11-12 22:54:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:06,939 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 869 transitions. [2021-11-12 22:54:06,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.666666666666668) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 22:54:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 869 transitions. [2021-11-12 22:54:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 22:54:06,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:06,944 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:06,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:07,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:07,162 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash -670358513, now seen corresponding path program 1 times [2021-11-12 22:54:07,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:07,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676153750] [2021-11-12 22:54:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:07,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:07,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:07,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:07,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:54:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-12 22:54:08,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 22:54:08,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:08,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676153750] [2021-11-12 22:54:08,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676153750] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:54:08,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:54:08,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 22:54:08,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848389709] [2021-11-12 22:54:08,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:08,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:54:08,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:08,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:54:08,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:54:08,518 INFO L87 Difference]: Start difference. First operand 607 states and 869 transitions. Second operand has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 22:54:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:08,737 INFO L93 Difference]: Finished difference Result 1155 states and 1670 transitions. [2021-11-12 22:54:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:08,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 195 [2021-11-12 22:54:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:08,743 INFO L225 Difference]: With dead ends: 1155 [2021-11-12 22:54:08,744 INFO L226 Difference]: Without dead ends: 609 [2021-11-12 22:54:08,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:54:08,747 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 361 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 3846 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.29ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:08,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 3846 Invalid, 103 Unknown, 0 Unchecked, 9.29ms Time], IncrementalHoareTripleChecker [47 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 144.37ms Time] [2021-11-12 22:54:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-12 22:54:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2021-11-12 22:54:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 453 states have (on average 1.445916114790287) internal successors, (655), 466 states have internal predecessors, (655), 108 states have call successors, (108), 46 states have call predecessors, (108), 47 states have return successors, (111), 104 states have call predecessors, (111), 105 states have call successors, (111) [2021-11-12 22:54:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 874 transitions. [2021-11-12 22:54:08,783 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 874 transitions. Word has length 195 [2021-11-12 22:54:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:08,784 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 874 transitions. [2021-11-12 22:54:08,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 22:54:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 874 transitions. [2021-11-12 22:54:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-12 22:54:08,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:08,789 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:08,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:09,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:09,007 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:09,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:09,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1234981107, now seen corresponding path program 1 times [2021-11-12 22:54:09,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:09,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122617863] [2021-11-12 22:54:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:09,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:09,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:09,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:09,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:54:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:09,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:54:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 22:54:09,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:54:10,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:10,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122617863] [2021-11-12 22:54:10,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122617863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:10,387 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:10,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:54:10,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932481924] [2021-11-12 22:54:10,391 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:10,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:54:10,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:54:10,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:10,393 INFO L87 Difference]: Start difference. First operand 609 states and 874 transitions. Second operand has 12 states, 8 states have (on average 17.25) internal successors, (138), 12 states have internal predecessors, (138), 6 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (36), 3 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-12 22:54:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:10,692 INFO L93 Difference]: Finished difference Result 1143 states and 1656 transitions. [2021-11-12 22:54:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:54:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 17.25) internal successors, (138), 12 states have internal predecessors, (138), 6 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (36), 3 states have call predecessors, (36), 6 states have call successors, (36) Word has length 189 [2021-11-12 22:54:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:10,698 INFO L225 Difference]: With dead ends: 1143 [2021-11-12 22:54:10,699 INFO L226 Difference]: Without dead ends: 609 [2021-11-12 22:54:10,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:54:10,702 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 357 mSDsluCounter, 6872 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 7723 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.93ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:10,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 7723 Invalid, 144 Unknown, 0 Unchecked, 13.93ms Time], IncrementalHoareTripleChecker [40 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 180.65ms Time] [2021-11-12 22:54:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-12 22:54:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2021-11-12 22:54:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 453 states have (on average 1.445916114790287) internal successors, (655), 466 states have internal predecessors, (655), 108 states have call successors, (108), 46 states have call predecessors, (108), 47 states have return successors, (110), 104 states have call predecessors, (110), 105 states have call successors, (110) [2021-11-12 22:54:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 873 transitions. [2021-11-12 22:54:10,737 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 873 transitions. Word has length 189 [2021-11-12 22:54:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:10,738 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 873 transitions. [2021-11-12 22:54:10,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 17.25) internal successors, (138), 12 states have internal predecessors, (138), 6 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (36), 3 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-12 22:54:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 873 transitions. [2021-11-12 22:54:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 22:54:10,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:10,743 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:10,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:10,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:10,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:10,956 INFO L85 PathProgramCache]: Analyzing trace with hash -847320510, now seen corresponding path program 2 times [2021-11-12 22:54:10,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:10,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303602320] [2021-11-12 22:54:10,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:54:10,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:10,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:10,958 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:10,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:54:11,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 22:54:11,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:54:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:11,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:54:11,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 22:54:12,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:12,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303602320] [2021-11-12 22:54:12,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303602320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:12,007 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:12,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:54:12,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181235440] [2021-11-12 22:54:12,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:12,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:12,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:12,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:12,010 INFO L87 Difference]: Start difference. First operand 609 states and 873 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:12,147 INFO L93 Difference]: Finished difference Result 1072 states and 1545 transitions. [2021-11-12 22:54:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:54:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 190 [2021-11-12 22:54:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:12,155 INFO L225 Difference]: With dead ends: 1072 [2021-11-12 22:54:12,155 INFO L226 Difference]: Without dead ends: 738 [2021-11-12 22:54:12,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:12,158 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 169 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.44ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:12,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1914 Invalid, 26 Unknown, 0 Unchecked, 4.44ms Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 75.13ms Time] [2021-11-12 22:54:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-12 22:54:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 730. [2021-11-12 22:54:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 557 states have (on average 1.4721723518850987) internal successors, (820), 570 states have internal predecessors, (820), 125 states have call successors, (125), 46 states have call predecessors, (125), 47 states have return successors, (128), 121 states have call predecessors, (128), 122 states have call successors, (128) [2021-11-12 22:54:12,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1073 transitions. [2021-11-12 22:54:12,210 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1073 transitions. Word has length 190 [2021-11-12 22:54:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:12,211 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1073 transitions. [2021-11-12 22:54:12,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1073 transitions. [2021-11-12 22:54:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-12 22:54:12,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:12,216 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:12,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:12,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:12,430 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:12,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash -666587029, now seen corresponding path program 1 times [2021-11-12 22:54:12,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:12,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743610960] [2021-11-12 22:54:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:12,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:12,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:12,433 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:12,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:54:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:12,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:54:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 22:54:13,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 22:54:13,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:13,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743610960] [2021-11-12 22:54:13,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743610960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:13,790 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:13,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:54:13,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148110307] [2021-11-12 22:54:13,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:13,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:54:13,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:13,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:54:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:13,792 INFO L87 Difference]: Start difference. First operand 730 states and 1073 transitions. Second operand has 12 states, 8 states have (on average 19.25) internal successors, (154), 12 states have internal predecessors, (154), 6 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (38), 3 states have call predecessors, (38), 6 states have call successors, (38) [2021-11-12 22:54:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:14,090 INFO L93 Difference]: Finished difference Result 1387 states and 2059 transitions. [2021-11-12 22:54:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:54:14,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 19.25) internal successors, (154), 12 states have internal predecessors, (154), 6 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (38), 3 states have call predecessors, (38), 6 states have call successors, (38) Word has length 209 [2021-11-12 22:54:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:14,097 INFO L225 Difference]: With dead ends: 1387 [2021-11-12 22:54:14,097 INFO L226 Difference]: Without dead ends: 732 [2021-11-12 22:54:14,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:54:14,101 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 528 mSDsluCounter, 7065 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 7917 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.81ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 185.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:14,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 7917 Invalid, 173 Unknown, 0 Unchecked, 13.81ms Time], IncrementalHoareTripleChecker [60 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 185.75ms Time] [2021-11-12 22:54:14,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-12 22:54:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2021-11-12 22:54:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 558 states have (on average 1.471326164874552) internal successors, (821), 572 states have internal predecessors, (821), 125 states have call successors, (125), 46 states have call predecessors, (125), 48 states have return successors, (130), 121 states have call predecessors, (130), 122 states have call successors, (130) [2021-11-12 22:54:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1076 transitions. [2021-11-12 22:54:14,148 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1076 transitions. Word has length 209 [2021-11-12 22:54:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:14,148 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1076 transitions. [2021-11-12 22:54:14,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 19.25) internal successors, (154), 12 states have internal predecessors, (154), 6 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (38), 3 states have call predecessors, (38), 6 states have call successors, (38) [2021-11-12 22:54:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1076 transitions. [2021-11-12 22:54:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-12 22:54:14,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:14,153 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:14,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:14,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:14,368 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash 110000035, now seen corresponding path program 1 times [2021-11-12 22:54:14,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:14,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475130111] [2021-11-12 22:54:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:14,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:14,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:14,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:14,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:54:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:14,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:54:15,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-12 22:54:15,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:15,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475130111] [2021-11-12 22:54:15,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475130111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:15,634 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:15,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 22:54:15,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65019528] [2021-11-12 22:54:15,634 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:15,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:54:15,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:54:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:54:15,636 INFO L87 Difference]: Start difference. First operand 732 states and 1076 transitions. Second operand has 9 states, 7 states have (on average 23.0) internal successors, (161), 9 states have internal predecessors, (161), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-12 22:54:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:15,837 INFO L93 Difference]: Finished difference Result 1384 states and 2053 transitions. [2021-11-12 22:54:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:15,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 23.0) internal successors, (161), 9 states have internal predecessors, (161), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 231 [2021-11-12 22:54:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:15,844 INFO L225 Difference]: With dead ends: 1384 [2021-11-12 22:54:15,844 INFO L226 Difference]: Without dead ends: 732 [2021-11-12 22:54:15,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:54:15,848 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 363 mSDsluCounter, 4321 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.55ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:15,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5171 Invalid, 117 Unknown, 0 Unchecked, 7.55ms Time], IncrementalHoareTripleChecker [41 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 123.08ms Time] [2021-11-12 22:54:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-12 22:54:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2021-11-12 22:54:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 558 states have (on average 1.471326164874552) internal successors, (821), 572 states have internal predecessors, (821), 125 states have call successors, (125), 46 states have call predecessors, (125), 48 states have return successors, (129), 121 states have call predecessors, (129), 122 states have call successors, (129) [2021-11-12 22:54:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1075 transitions. [2021-11-12 22:54:15,888 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1075 transitions. Word has length 231 [2021-11-12 22:54:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:15,892 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1075 transitions. [2021-11-12 22:54:15,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 23.0) internal successors, (161), 9 states have internal predecessors, (161), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-12 22:54:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1075 transitions. [2021-11-12 22:54:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-12 22:54:15,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:15,896 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:15,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:16,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:16,118 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 765397223, now seen corresponding path program 1 times [2021-11-12 22:54:16,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:16,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866083108] [2021-11-12 22:54:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:16,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:16,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:16,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:16,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:54:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:16,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:54:16,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:54:16,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-12 22:54:17,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:17,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866083108] [2021-11-12 22:54:17,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866083108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:17,330 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:17,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 22:54:17,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353537026] [2021-11-12 22:54:17,330 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:17,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:54:17,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:54:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:54:17,332 INFO L87 Difference]: Start difference. First operand 732 states and 1075 transitions. Second operand has 9 states, 7 states have (on average 21.428571428571427) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-12 22:54:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:17,576 INFO L93 Difference]: Finished difference Result 1386 states and 2059 transitions. [2021-11-12 22:54:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 21.428571428571427) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) Word has length 204 [2021-11-12 22:54:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:17,582 INFO L225 Difference]: With dead ends: 1386 [2021-11-12 22:54:17,583 INFO L226 Difference]: Without dead ends: 734 [2021-11-12 22:54:17,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:54:17,586 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 533 mSDsluCounter, 3666 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 4517 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.06ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:17,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 4517 Invalid, 141 Unknown, 0 Unchecked, 7.06ms Time], IncrementalHoareTripleChecker [59 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 171.48ms Time] [2021-11-12 22:54:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-12 22:54:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-12 22:54:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 559 states have (on average 1.4704830053667264) internal successors, (822), 574 states have internal predecessors, (822), 125 states have call successors, (125), 46 states have call predecessors, (125), 49 states have return successors, (134), 121 states have call predecessors, (134), 122 states have call successors, (134) [2021-11-12 22:54:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1081 transitions. [2021-11-12 22:54:17,649 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1081 transitions. Word has length 204 [2021-11-12 22:54:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:17,652 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1081 transitions. [2021-11-12 22:54:17,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 21.428571428571427) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-12 22:54:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1081 transitions. [2021-11-12 22:54:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-12 22:54:17,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:17,657 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:17,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:17,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:17,875 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash -970351878, now seen corresponding path program 1 times [2021-11-12 22:54:17,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:17,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922973730] [2021-11-12 22:54:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:17,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:17,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:17,877 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:17,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:54:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:54:18,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:54:18,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:18,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922973730] [2021-11-12 22:54:18,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922973730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:18,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:18,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:18,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145490612] [2021-11-12 22:54:18,999 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:19,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:19,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:19,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:19,001 INFO L87 Difference]: Start difference. First operand 734 states and 1081 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 22:54:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:19,051 INFO L93 Difference]: Finished difference Result 1452 states and 2163 transitions. [2021-11-12 22:54:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 212 [2021-11-12 22:54:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:19,058 INFO L225 Difference]: With dead ends: 1452 [2021-11-12 22:54:19,058 INFO L226 Difference]: Without dead ends: 834 [2021-11-12 22:54:19,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:19,062 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 165 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.01ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:19,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1706 Invalid, 4 Unknown, 0 Unchecked, 6.01ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.28ms Time] [2021-11-12 22:54:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-12 22:54:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 826. [2021-11-12 22:54:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 637 states have (on average 1.4772370486656201) internal successors, (941), 652 states have internal predecessors, (941), 139 states have call successors, (139), 46 states have call predecessors, (139), 49 states have return successors, (150), 135 states have call predecessors, (150), 136 states have call successors, (150) [2021-11-12 22:54:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1230 transitions. [2021-11-12 22:54:19,143 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1230 transitions. Word has length 212 [2021-11-12 22:54:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:19,144 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1230 transitions. [2021-11-12 22:54:19,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 22:54:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1230 transitions. [2021-11-12 22:54:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-12 22:54:19,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:19,149 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:19,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:19,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:19,367 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:19,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash 463241009, now seen corresponding path program 1 times [2021-11-12 22:54:19,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:19,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62732364] [2021-11-12 22:54:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:19,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:19,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:19,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:19,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:54:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:19,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:19,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 22:54:20,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 22:54:20,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:20,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62732364] [2021-11-12 22:54:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62732364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:20,560 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:20,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:20,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034995904] [2021-11-12 22:54:20,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:20,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:20,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:20,562 INFO L87 Difference]: Start difference. First operand 826 states and 1230 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-12 22:54:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:20,644 INFO L93 Difference]: Finished difference Result 1728 states and 2618 transitions. [2021-11-12 22:54:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:20,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 227 [2021-11-12 22:54:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:20,657 INFO L225 Difference]: With dead ends: 1728 [2021-11-12 22:54:20,657 INFO L226 Difference]: Without dead ends: 1029 [2021-11-12 22:54:20,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:20,660 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 163 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.44ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:20,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1738 Invalid, 4 Unknown, 0 Unchecked, 3.44ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 9.27ms Time] [2021-11-12 22:54:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-11-12 22:54:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1021. [2021-11-12 22:54:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 801 states have (on average 1.4931335830212236) internal successors, (1196), 816 states have internal predecessors, (1196), 170 states have call successors, (170), 46 states have call predecessors, (170), 49 states have return successors, (185), 166 states have call predecessors, (185), 167 states have call successors, (185) [2021-11-12 22:54:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1551 transitions. [2021-11-12 22:54:20,723 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1551 transitions. Word has length 227 [2021-11-12 22:54:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:20,723 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1551 transitions. [2021-11-12 22:54:20,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-12 22:54:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1551 transitions. [2021-11-12 22:54:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-12 22:54:20,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:20,732 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:20,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:20,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:20,950 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:20,950 INFO L85 PathProgramCache]: Analyzing trace with hash -358297493, now seen corresponding path program 1 times [2021-11-12 22:54:20,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:20,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626479673] [2021-11-12 22:54:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:20,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:20,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:20,952 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:20,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:54:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:21,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:21,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:21,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:22,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:22,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626479673] [2021-11-12 22:54:22,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626479673] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:22,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:22,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:22,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271842074] [2021-11-12 22:54:22,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:22,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:22,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:22,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:22,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:22,068 INFO L87 Difference]: Start difference. First operand 1021 states and 1551 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:22,183 INFO L93 Difference]: Finished difference Result 2299 states and 3558 transitions. [2021-11-12 22:54:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 207 [2021-11-12 22:54:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:22,194 INFO L225 Difference]: With dead ends: 2299 [2021-11-12 22:54:22,195 INFO L226 Difference]: Without dead ends: 1413 [2021-11-12 22:54:22,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:22,200 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 161 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:22,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1731 Invalid, 4 Unknown, 0 Unchecked, 3.70ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.69ms Time] [2021-11-12 22:54:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-11-12 22:54:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1405. [2021-11-12 22:54:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1127 states have (on average 1.5164152617568767) internal successors, (1709), 1142 states have internal predecessors, (1709), 228 states have call successors, (228), 46 states have call predecessors, (228), 49 states have return successors, (243), 224 states have call predecessors, (243), 225 states have call successors, (243) [2021-11-12 22:54:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2180 transitions. [2021-11-12 22:54:22,287 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2180 transitions. Word has length 207 [2021-11-12 22:54:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:22,287 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2180 transitions. [2021-11-12 22:54:22,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2180 transitions. [2021-11-12 22:54:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-12 22:54:22,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:22,295 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:22,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:22,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:22,513 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:22,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:22,514 INFO L85 PathProgramCache]: Analyzing trace with hash -760060097, now seen corresponding path program 1 times [2021-11-12 22:54:22,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:22,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202290551] [2021-11-12 22:54:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:22,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:22,515 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:22,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:54:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:22,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:54:23,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:54:23,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:23,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202290551] [2021-11-12 22:54:23,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202290551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:23,599 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:23,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:23,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412741603] [2021-11-12 22:54:23,600 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:23,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:23,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:23,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:23,602 INFO L87 Difference]: Start difference. First operand 1405 states and 2180 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 22:54:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:23,730 INFO L93 Difference]: Finished difference Result 3394 states and 5369 transitions. [2021-11-12 22:54:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:23,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 215 [2021-11-12 22:54:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:23,746 INFO L225 Difference]: With dead ends: 3394 [2021-11-12 22:54:23,747 INFO L226 Difference]: Without dead ends: 2135 [2021-11-12 22:54:23,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:23,753 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 159 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:23,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1726 Invalid, 4 Unknown, 0 Unchecked, 3.59ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 17.07ms Time] [2021-11-12 22:54:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-11-12 22:54:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2127. [2021-11-12 22:54:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 1753 states have (on average 1.5413576725613234) internal successors, (2702), 1768 states have internal predecessors, (2702), 324 states have call successors, (324), 46 states have call predecessors, (324), 49 states have return successors, (347), 320 states have call predecessors, (347), 321 states have call successors, (347) [2021-11-12 22:54:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 3373 transitions. [2021-11-12 22:54:23,940 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 3373 transitions. Word has length 215 [2021-11-12 22:54:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:23,941 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 3373 transitions. [2021-11-12 22:54:23,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 22:54:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 3373 transitions. [2021-11-12 22:54:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-12 22:54:23,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:23,952 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:23,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:24,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:24,170 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2139031459, now seen corresponding path program 1 times [2021-11-12 22:54:24,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:24,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660011356] [2021-11-12 22:54:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:24,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:24,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:24,172 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:24,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:54:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:24,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:24,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:25,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:25,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660011356] [2021-11-12 22:54:25,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660011356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:25,267 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:25,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:25,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042793078] [2021-11-12 22:54:25,267 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:25,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:25,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:25,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:25,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:25,269 INFO L87 Difference]: Start difference. First operand 2127 states and 3373 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:25,474 INFO L93 Difference]: Finished difference Result 5483 states and 8836 transitions. [2021-11-12 22:54:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 209 [2021-11-12 22:54:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:25,500 INFO L225 Difference]: With dead ends: 5483 [2021-11-12 22:54:25,500 INFO L226 Difference]: Without dead ends: 3513 [2021-11-12 22:54:25,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:25,510 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 157 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:25,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1726 Invalid, 4 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.73ms Time] [2021-11-12 22:54:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-11-12 22:54:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3505. [2021-11-12 22:54:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 2963 states have (on average 1.56294296321296) internal successors, (4631), 2978 states have internal predecessors, (4631), 492 states have call successors, (492), 46 states have call predecessors, (492), 49 states have return successors, (531), 488 states have call predecessors, (531), 489 states have call successors, (531) [2021-11-12 22:54:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 5654 transitions. [2021-11-12 22:54:25,797 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 5654 transitions. Word has length 209 [2021-11-12 22:54:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:25,798 INFO L470 AbstractCegarLoop]: Abstraction has 3505 states and 5654 transitions. [2021-11-12 22:54:25,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 5654 transitions. [2021-11-12 22:54:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-12 22:54:25,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:25,812 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:25,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:26,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:26,030 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1887852652, now seen corresponding path program 1 times [2021-11-12 22:54:26,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:26,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18811924] [2021-11-12 22:54:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:26,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:26,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:26,032 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:26,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:54:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:26,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:54:26,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:54:27,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:27,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18811924] [2021-11-12 22:54:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18811924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:27,212 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:27,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:27,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917992990] [2021-11-12 22:54:27,212 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:27,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:27,214 INFO L87 Difference]: Start difference. First operand 3505 states and 5654 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 22:54:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:27,544 INFO L93 Difference]: Finished difference Result 9476 states and 15438 transitions. [2021-11-12 22:54:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:27,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 217 [2021-11-12 22:54:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:27,589 INFO L225 Difference]: With dead ends: 9476 [2021-11-12 22:54:27,590 INFO L226 Difference]: Without dead ends: 6139 [2021-11-12 22:54:27,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:27,603 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 155 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:27,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1740 Invalid, 4 Unknown, 0 Unchecked, 3.49ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 14.08ms Time] [2021-11-12 22:54:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6139 states. [2021-11-12 22:54:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6139 to 6131. [2021-11-12 22:54:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6131 states, 5205 states have (on average 1.5661863592699328) internal successors, (8152), 5220 states have internal predecessors, (8152), 876 states have call successors, (876), 46 states have call predecessors, (876), 49 states have return successors, (947), 872 states have call predecessors, (947), 873 states have call successors, (947) [2021-11-12 22:54:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6131 states to 6131 states and 9975 transitions. [2021-11-12 22:54:28,115 INFO L78 Accepts]: Start accepts. Automaton has 6131 states and 9975 transitions. Word has length 217 [2021-11-12 22:54:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:28,116 INFO L470 AbstractCegarLoop]: Abstraction has 6131 states and 9975 transitions. [2021-11-12 22:54:28,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 22:54:28,116 INFO L276 IsEmpty]: Start isEmpty. Operand 6131 states and 9975 transitions. [2021-11-12 22:54:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-12 22:54:28,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:28,136 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:28,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:28,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:28,354 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:28,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1179852200, now seen corresponding path program 1 times [2021-11-12 22:54:28,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:28,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661927398] [2021-11-12 22:54:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:28,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:28,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:28,358 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:28,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:54:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:28,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:28,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:29,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:29,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:29,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661927398] [2021-11-12 22:54:29,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661927398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:29,464 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:29,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:29,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216994388] [2021-11-12 22:54:29,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:29,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:29,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:29,466 INFO L87 Difference]: Start difference. First operand 6131 states and 9975 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:30,042 INFO L93 Difference]: Finished difference Result 17280 states and 28358 transitions. [2021-11-12 22:54:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 211 [2021-11-12 22:54:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:30,099 INFO L225 Difference]: With dead ends: 17280 [2021-11-12 22:54:30,099 INFO L226 Difference]: Without dead ends: 11325 [2021-11-12 22:54:30,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:30,122 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 153 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:30,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1733 Invalid, 4 Unknown, 0 Unchecked, 3.36ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.45ms Time] [2021-11-12 22:54:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2021-11-12 22:54:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11317. [2021-11-12 22:54:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 9687 states have (on average 1.5749974192216372) internal successors, (15257), 9702 states have internal predecessors, (15257), 1580 states have call successors, (1580), 46 states have call predecessors, (1580), 49 states have return successors, (1715), 1576 states have call predecessors, (1715), 1577 states have call successors, (1715) [2021-11-12 22:54:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 18552 transitions. [2021-11-12 22:54:31,041 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 18552 transitions. Word has length 211 [2021-11-12 22:54:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:31,042 INFO L470 AbstractCegarLoop]: Abstraction has 11317 states and 18552 transitions. [2021-11-12 22:54:31,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 18552 transitions. [2021-11-12 22:54:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-12 22:54:31,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:31,069 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:31,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:31,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:31,270 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1161280083, now seen corresponding path program 1 times [2021-11-12 22:54:31,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:31,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661262024] [2021-11-12 22:54:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:31,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:31,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:31,273 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:31,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:54:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:31,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:32,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:32,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:32,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661262024] [2021-11-12 22:54:32,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661262024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:32,367 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:32,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:54:32,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342515763] [2021-11-12 22:54:32,367 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:32,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:54:32,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:32,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:54:32,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:32,369 INFO L87 Difference]: Start difference. First operand 11317 states and 18552 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:33,118 INFO L93 Difference]: Finished difference Result 22424 states and 36802 transitions. [2021-11-12 22:54:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 211 [2021-11-12 22:54:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:33,167 INFO L225 Difference]: With dead ends: 22424 [2021-11-12 22:54:33,168 INFO L226 Difference]: Without dead ends: 11325 [2021-11-12 22:54:33,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:54:33,203 INFO L933 BasicCegarLoop]: 1037 mSDtfsCounter, 151 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.18ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:33,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 2783 Invalid, 5 Unknown, 0 Unchecked, 5.42ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 27.18ms Time] [2021-11-12 22:54:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2021-11-12 22:54:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11317. [2021-11-12 22:54:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 9687 states have (on average 1.5683906266129866) internal successors, (15193), 9702 states have internal predecessors, (15193), 1580 states have call successors, (1580), 46 states have call predecessors, (1580), 49 states have return successors, (1715), 1576 states have call predecessors, (1715), 1577 states have call successors, (1715) [2021-11-12 22:54:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 18488 transitions. [2021-11-12 22:54:34,115 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 18488 transitions. Word has length 211 [2021-11-12 22:54:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:34,116 INFO L470 AbstractCegarLoop]: Abstraction has 11317 states and 18488 transitions. [2021-11-12 22:54:34,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 18488 transitions. [2021-11-12 22:54:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-12 22:54:34,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:34,142 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:34,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:34,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:34,360 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1594227532, now seen corresponding path program 1 times [2021-11-12 22:54:34,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:34,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862229367] [2021-11-12 22:54:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:34,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:34,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:34,363 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:34,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:54:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:35,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:35,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:35,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862229367] [2021-11-12 22:54:35,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862229367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:35,456 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:35,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:35,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092427886] [2021-11-12 22:54:35,457 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:35,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:35,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:35,458 INFO L87 Difference]: Start difference. First operand 11317 states and 18488 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:36,453 INFO L93 Difference]: Finished difference Result 30444 states and 49439 transitions. [2021-11-12 22:54:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:36,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 212 [2021-11-12 22:54:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:36,522 INFO L225 Difference]: With dead ends: 30444 [2021-11-12 22:54:36,523 INFO L226 Difference]: Without dead ends: 19327 [2021-11-12 22:54:36,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:36,548 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 151 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:36,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1720 Invalid, 4 Unknown, 0 Unchecked, 2.69ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.79ms Time] [2021-11-12 22:54:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19327 states. [2021-11-12 22:54:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19327 to 19319. [2021-11-12 22:54:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19319 states, 16601 states have (on average 1.535931570387326) internal successors, (25498), 16616 states have internal predecessors, (25498), 2668 states have call successors, (2668), 46 states have call predecessors, (2668), 49 states have return successors, (2931), 2664 states have call predecessors, (2931), 2665 states have call successors, (2931) [2021-11-12 22:54:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19319 states to 19319 states and 31097 transitions. [2021-11-12 22:54:37,910 INFO L78 Accepts]: Start accepts. Automaton has 19319 states and 31097 transitions. Word has length 212 [2021-11-12 22:54:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:37,911 INFO L470 AbstractCegarLoop]: Abstraction has 19319 states and 31097 transitions. [2021-11-12 22:54:37,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 19319 states and 31097 transitions. [2021-11-12 22:54:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-12 22:54:37,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:37,944 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:37,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:38,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:38,161 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:38,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:38,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1967246448, now seen corresponding path program 1 times [2021-11-12 22:54:38,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:38,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677700536] [2021-11-12 22:54:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:38,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:38,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:38,165 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:38,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:54:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:38,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:39,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:39,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:39,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677700536] [2021-11-12 22:54:39,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677700536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:39,519 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:39,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:39,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183714859] [2021-11-12 22:54:39,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:39,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:39,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:39,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:39,520 INFO L87 Difference]: Start difference. First operand 19319 states and 31097 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:41,443 INFO L93 Difference]: Finished difference Result 56105 states and 90584 transitions. [2021-11-12 22:54:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:41,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 213 [2021-11-12 22:54:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:41,556 INFO L225 Difference]: With dead ends: 56105 [2021-11-12 22:54:41,556 INFO L226 Difference]: Without dead ends: 36993 [2021-11-12 22:54:41,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:41,597 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 149 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.09ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:41,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1732 Invalid, 4 Unknown, 0 Unchecked, 3.09ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 4.09ms Time] [2021-11-12 22:54:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36993 states. [2021-11-12 22:54:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36993 to 36985. [2021-11-12 22:54:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36985 states, 31963 states have (on average 1.5346181522385258) internal successors, (49051), 31978 states have internal predecessors, (49051), 4972 states have call successors, (4972), 46 states have call predecessors, (4972), 49 states have return successors, (5491), 4968 states have call predecessors, (5491), 4969 states have call successors, (5491) [2021-11-12 22:54:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36985 states to 36985 states and 59514 transitions. [2021-11-12 22:54:44,215 INFO L78 Accepts]: Start accepts. Automaton has 36985 states and 59514 transitions. Word has length 213 [2021-11-12 22:54:44,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:44,215 INFO L470 AbstractCegarLoop]: Abstraction has 36985 states and 59514 transitions. [2021-11-12 22:54:44,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-12 22:54:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 36985 states and 59514 transitions. [2021-11-12 22:54:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-12 22:54:44,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:44,248 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:44,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:44,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:44,464 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash 407570126, now seen corresponding path program 1 times [2021-11-12 22:54:44,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:44,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596938239] [2021-11-12 22:54:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:44,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:44,467 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:44,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:54:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:45,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:54:45,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:54:45,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:45,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596938239] [2021-11-12 22:54:45,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596938239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:45,661 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:45,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:45,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617309852] [2021-11-12 22:54:45,661 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:45,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:45,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:45,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:45,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:45,662 INFO L87 Difference]: Start difference. First operand 36985 states and 59514 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 22:54:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:49,132 INFO L93 Difference]: Finished difference Result 107557 states and 173776 transitions. [2021-11-12 22:54:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 221 [2021-11-12 22:54:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:49,301 INFO L225 Difference]: With dead ends: 107557 [2021-11-12 22:54:49,301 INFO L226 Difference]: Without dead ends: 70787 [2021-11-12 22:54:49,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:49,370 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 147 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:49,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1732 Invalid, 4 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.99ms Time] [2021-11-12 22:54:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70787 states. [2021-11-12 22:54:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70787 to 70779. [2021-11-12 22:54:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70779 states, 61405 states have (on average 1.5367478218386126) internal successors, (94364), 61420 states have internal predecessors, (94364), 9324 states have call successors, (9324), 46 states have call predecessors, (9324), 49 states have return successors, (10355), 9320 states have call predecessors, (10355), 9321 states have call successors, (10355) [2021-11-12 22:54:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70779 states to 70779 states and 114043 transitions. [2021-11-12 22:54:54,279 INFO L78 Accepts]: Start accepts. Automaton has 70779 states and 114043 transitions. Word has length 221 [2021-11-12 22:54:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:54,280 INFO L470 AbstractCegarLoop]: Abstraction has 70779 states and 114043 transitions. [2021-11-12 22:54:54,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-12 22:54:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 70779 states and 114043 transitions. [2021-11-12 22:54:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-12 22:54:54,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:54,318 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:54,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-12 22:54:54,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:54,519 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:54,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2128868202, now seen corresponding path program 1 times [2021-11-12 22:54:54,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:54,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788637719] [2021-11-12 22:54:54,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:54,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:54,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:54,521 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:54,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d8e5d7e-3812-4adb-ba15-1c1464e89f01/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:54:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:54,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:55,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 22:54:55,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:55,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788637719] [2021-11-12 22:54:55,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788637719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:55,631 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:55,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:54:55,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605027143] [2021-11-12 22:54:55,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:55,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:54:55,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:54:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:54:55,633 INFO L87 Difference]: Start difference. First operand 70779 states and 114043 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33)