./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/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 be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:45:05,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:45:05,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:45:05,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:45:05,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:45:05,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:45:05,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:45:05,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:45:05,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:45:05,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:45:05,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:45:05,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:45:05,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:45:05,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:45:05,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:45:05,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:45:05,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:45:05,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:45:05,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:45:05,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:45:05,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:45:05,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:45:05,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:45:05,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:45:05,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:45:05,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:45:05,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:45:05,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:45:05,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:45:05,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:45:05,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:45:05,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:45:05,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:45:05,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:45:05,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:45:05,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:45:05,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:45:05,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:45:05,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:45:05,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:45:05,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:45:05,169 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:45:05,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:45:05,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:45:05,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:45:05,220 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:45:05,220 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:45:05,220 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:45:05,221 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:45:05,221 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:45:05,221 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:45:05,221 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:45:05,222 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:45:05,223 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:45:05,223 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:45:05,223 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:45:05,224 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:45:05,224 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:45:05,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:45:05,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:45:05,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:45:05,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:45:05,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:45:05,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:45:05,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:45:05,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:45:05,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:45:05,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:45:05,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:45:05,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:45:05,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:45:05,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:45:05,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:45:05,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:45:05,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:45:05,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:45:05,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:45:05,231 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:45:05,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:45:05,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:45:05,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:45:05,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:45:05,233 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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2021-11-12 23:45:05,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:45:05,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:45:05,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:45:05,573 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:45:05,573 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:45:05,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-12 23:45:05,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data/f7f0bda70/fac01dc0cdc94c2799cf1b2f9e743092/FLAG72bbee596 [2021-11-12 23:45:06,339 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:45:06,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-12 23:45:06,365 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data/f7f0bda70/fac01dc0cdc94c2799cf1b2f9e743092/FLAG72bbee596 [2021-11-12 23:45:06,546 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data/f7f0bda70/fac01dc0cdc94c2799cf1b2f9e743092 [2021-11-12 23:45:06,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:45:06,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:45:06,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:45:06,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:45:06,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:45:06,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:45:06" (1/1) ... [2021-11-12 23:45:06,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cb03db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:06, skipping insertion in model container [2021-11-12 23:45:06,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:45:06" (1/1) ... [2021-11-12 23:45:06,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:45:06,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:45:07,238 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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-12 23:45:07,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:45:07,313 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:45:07,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@455f5c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:07, skipping insertion in model container [2021-11-12 23:45:07,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:45:07,315 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:45:07,318 INFO L158 Benchmark]: Toolchain (without parser) took 762.33ms. Allocated memory is still 107.0MB. Free memory was 70.3MB in the beginning and 68.1MB in the end (delta: 2.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:45:07,319 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 75.5MB. Free memory was 49.2MB in the beginning and 49.2MB in the end (delta: 26.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:45:07,321 INFO L158 Benchmark]: CACSL2BoogieTranslator took 758.17ms. Allocated memory is still 107.0MB. Free memory was 70.1MB in the beginning and 68.1MB in the end (delta: 2.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:45:07,324 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 75.5MB. Free memory was 49.2MB in the beginning and 49.2MB in the end (delta: 26.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 758.17ms. Allocated memory is still 107.0MB. Free memory was 70.1MB in the beginning and 68.1MB in the end (delta: 2.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 179]: 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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/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 be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:45:09,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:45:09,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:45:09,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:45:09,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:45:09,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:45:09,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:45:09,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:45:09,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:45:09,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:45:09,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:45:09,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:45:09,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:45:10,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:45:10,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:45:10,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:45:10,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:45:10,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:45:10,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:45:10,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:45:10,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:45:10,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:45:10,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:45:10,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:45:10,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:45:10,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:45:10,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:45:10,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:45:10,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:45:10,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:45:10,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:45:10,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:45:10,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:45:10,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:45:10,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:45:10,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:45:10,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:45:10,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:45:10,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:45:10,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:45:10,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:45:10,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:45:10,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:45:10,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:45:10,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:45:10,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:45:10,129 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:45:10,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:45:10,129 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:45:10,129 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:45:10,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:45:10,130 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:45:10,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:45:10,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:45:10,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:45:10,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:45:10,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:45:10,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:45:10,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:45:10,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:45:10,135 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:45:10,135 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:45:10,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:45:10,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:45:10,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:45:10,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:45:10,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:45:10,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:45:10,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:45:10,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:45:10,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:45:10,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:45:10,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:45:10,139 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:45:10,139 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:45:10,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:45:10,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:45:10,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:45:10,141 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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be08b04703653fc518e8f41dc63d028f83e90f3984633a298492c10e4ad9cfd9 [2021-11-12 23:45:10,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:45:10,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:45:10,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:45:10,636 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:45:10,637 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:45:10,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-12 23:45:10,721 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data/a6749518d/8c5281e5f44c4e7e91aca02c2723fad7/FLAG87b707114 [2021-11-12 23:45:11,538 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:45:11,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c [2021-11-12 23:45:11,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data/a6749518d/8c5281e5f44c4e7e91aca02c2723fad7/FLAG87b707114 [2021-11-12 23:45:11,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/data/a6749518d/8c5281e5f44c4e7e91aca02c2723fad7 [2021-11-12 23:45:11,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:45:11,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:45:11,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:45:11,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:45:11,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:45:11,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:45:11" (1/1) ... [2021-11-12 23:45:11,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5443cb02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:11, skipping insertion in model container [2021-11-12 23:45:11,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:45:11" (1/1) ... [2021-11-12 23:45:11,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:45:11,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:45:12,482 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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-12 23:45:12,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:45:12,552 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:45:12,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:45:12,770 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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-12 23:45:12,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:45:12,798 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:45:12,883 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_666b45b0-11ef-4cb4-92f6-fb60788a3d19/sv-benchmarks/c/product-lines/elevator_spec1_product23.cil.c[58338,58351] [2021-11-12 23:45:12,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:45:12,940 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:45:12,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12 WrapperNode [2021-11-12 23:45:12,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:45:12,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:45:12,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:45:12,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:45:12,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:45:13,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:45:13,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:45:13,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:45:13,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:45:13,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:45:13,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:45:13,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:45:13,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (1/1) ... [2021-11-12 23:45:13,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:45:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:45:13,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:45:13,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:45:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:45:13,372 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:45:13,373 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:45:13,373 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:45:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:45:13,374 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:45:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:45:13,374 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:45:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:45:13,374 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:45:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:45:13,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:45:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:45:13,375 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:45:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:45:13,375 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:45:13,376 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:45:13,376 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:45:13,376 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:45:13,376 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:45:13,376 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:45:13,377 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:45:13,377 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:45:13,377 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:45:13,377 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:45:13,377 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:45:13,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:45:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:45:13,378 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:45:13,378 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:45:13,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:45:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:45:13,379 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:45:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:45:13,379 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:45:13,379 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:45:13,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:45:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:45:13,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:45:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:45:13,380 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:45:13,380 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:45:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:45:13,381 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:45:13,381 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:45:13,381 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:45:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:45:13,382 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:45:13,382 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:45:13,383 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:45:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:45:13,385 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:45:13,386 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:45:13,386 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:45:13,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:45:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:45:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:45:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:45:17,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:45:17,629 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:45:17,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:45:17 BoogieIcfgContainer [2021-11-12 23:45:17,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:45:17,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:45:17,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:45:17,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:45:17,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:45:11" (1/3) ... [2021-11-12 23:45:17,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b93ba04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:45:17, skipping insertion in model container [2021-11-12 23:45:17,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:45:12" (2/3) ... [2021-11-12 23:45:17,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b93ba04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:45:17, skipping insertion in model container [2021-11-12 23:45:17,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:45:17" (3/3) ... [2021-11-12 23:45:17,643 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product23.cil.c [2021-11-12 23:45:17,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:45:17,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:45:17,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:45:17,740 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:45:17,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:45:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 594 states, 460 states have (on average 1.673913043478261) internal successors, (770), 481 states have internal predecessors, (770), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:45:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:45:17,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:17,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:17,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash -185393638, now seen corresponding path program 1 times [2021-11-12 23:45:17,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:17,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286975600] [2021-11-12 23:45:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:17,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:17,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:17,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:45:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:45:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:45:19,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:45:19,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:19,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286975600] [2021-11-12 23:45:19,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286975600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:19,528 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:19,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:45:19,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75111305] [2021-11-12 23:45:19,533 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:19,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:45:19,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:19,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:45:19,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:45:19,592 INFO L87 Difference]: Start difference. First operand has 594 states, 460 states have (on average 1.673913043478261) internal successors, (770), 481 states have internal predecessors, (770), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-12 23:45:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:19,701 INFO L93 Difference]: Finished difference Result 615 states and 1010 transitions. [2021-11-12 23:45:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:45:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2021-11-12 23:45:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:19,734 INFO L225 Difference]: With dead ends: 615 [2021-11-12 23:45:19,734 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 23:45:19,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 252 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 23:45:19,744 INFO L933 BasicCegarLoop]: 971 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, 971 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:19,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 13.85ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:45:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 23:45:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 23:45:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.671806167400881) internal successors, (759), 473 states have internal predecessors, (759), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 964 transitions. [2021-11-12 23:45:19,893 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 964 transitions. Word has length 127 [2021-11-12 23:45:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:19,895 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 964 transitions. [2021-11-12 23:45:19,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-12 23:45:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 964 transitions. [2021-11-12 23:45:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 23:45:19,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:19,911 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:19,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:45:20,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:20,112 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:20,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1127490313, now seen corresponding path program 1 times [2021-11-12 23:45:20,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:20,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639586537] [2021-11-12 23:45:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:20,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:20,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:20,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:20,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:45:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:20,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:45:21,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:45:21,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:21,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639586537] [2021-11-12 23:45:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639586537] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:21,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:21,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:21,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470972081] [2021-11-12 23:45:21,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:21,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:21,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:21,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:21,653 INFO L87 Difference]: Start difference. First operand 586 states and 964 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:21,782 INFO L93 Difference]: Finished difference Result 1163 states and 1920 transitions. [2021-11-12 23:45:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2021-11-12 23:45:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:21,791 INFO L225 Difference]: With dead ends: 1163 [2021-11-12 23:45:21,791 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 23:45:21,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:21,800 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 14 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.27ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:21,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2843 Invalid, 35 Unknown, 0 Unchecked, 14.27ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 48.19ms Time] [2021-11-12 23:45:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 23:45:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 23:45:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.669603524229075) internal successors, (758), 473 states have internal predecessors, (758), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 963 transitions. [2021-11-12 23:45:21,876 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 963 transitions. Word has length 129 [2021-11-12 23:45:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:21,877 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 963 transitions. [2021-11-12 23:45:21,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 963 transitions. [2021-11-12 23:45:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:45:21,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:21,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:21,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:22,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:22,105 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:22,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2130311401, now seen corresponding path program 1 times [2021-11-12 23:45:22,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:22,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44828034] [2021-11-12 23:45:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:22,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:22,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:22,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:45:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:22,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:45:23,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:45:23,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:23,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44828034] [2021-11-12 23:45:23,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44828034] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:23,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:23,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:23,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126822443] [2021-11-12 23:45:23,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:23,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:23,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:23,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:23,627 INFO L87 Difference]: Start difference. First operand 586 states and 963 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:23,731 INFO L93 Difference]: Finished difference Result 1163 states and 1918 transitions. [2021-11-12 23:45:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:23,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2021-11-12 23:45:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:23,739 INFO L225 Difference]: With dead ends: 1163 [2021-11-12 23:45:23,739 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 23:45:23,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:23,745 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 12 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.72ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:23,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2843 Invalid, 33 Unknown, 0 Unchecked, 9.72ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 43.09ms Time] [2021-11-12 23:45:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 23:45:23,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 23:45:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 454 states have (on average 1.6674008810572687) internal successors, (757), 473 states have internal predecessors, (757), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 962 transitions. [2021-11-12 23:45:23,786 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 962 transitions. Word has length 131 [2021-11-12 23:45:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:23,786 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 962 transitions. [2021-11-12 23:45:23,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 962 transitions. [2021-11-12 23:45:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:45:23,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:23,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:23,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:24,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:24,009 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:24,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1124320887, now seen corresponding path program 1 times [2021-11-12 23:45:24,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:24,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044323522] [2021-11-12 23:45:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:24,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:24,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:24,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:24,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:45:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:24,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:45:25,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:45:25,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:25,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044323522] [2021-11-12 23:45:25,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044323522] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:25,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:25,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:25,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017735217] [2021-11-12 23:45:25,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:25,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:25,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:25,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:25,509 INFO L87 Difference]: Start difference. First operand 586 states and 962 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:25,609 INFO L93 Difference]: Finished difference Result 1167 states and 1921 transitions. [2021-11-12 23:45:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:45:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-11-12 23:45:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:25,617 INFO L225 Difference]: With dead ends: 1167 [2021-11-12 23:45:25,617 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 23:45:25,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:25,622 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 13 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.68ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:25,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2843 Invalid, 35 Unknown, 0 Unchecked, 7.68ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 44.11ms Time] [2021-11-12 23:45:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 23:45:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 23:45:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6601307189542485) internal successors, (762), 478 states have internal predecessors, (762), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 967 transitions. [2021-11-12 23:45:25,660 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 967 transitions. Word has length 133 [2021-11-12 23:45:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:25,660 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 967 transitions. [2021-11-12 23:45:25,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 967 transitions. [2021-11-12 23:45:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:45:25,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:25,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:25,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:25,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:25,900 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1149847903, now seen corresponding path program 1 times [2021-11-12 23:45:25,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:25,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416921934] [2021-11-12 23:45:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:25,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:25,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:25,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:25,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:45:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:26,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:45:26,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:45:27,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:27,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416921934] [2021-11-12 23:45:27,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416921934] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:27,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:27,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:27,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779394451] [2021-11-12 23:45:27,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:27,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:27,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:27,315 INFO L87 Difference]: Start difference. First operand 592 states and 967 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:27,396 INFO L93 Difference]: Finished difference Result 1166 states and 1912 transitions. [2021-11-12 23:45:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2021-11-12 23:45:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:27,403 INFO L225 Difference]: With dead ends: 1166 [2021-11-12 23:45:27,403 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 23:45:27,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:27,408 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 8 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:27,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2844 Invalid, 30 Unknown, 0 Unchecked, 6.71ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 33.34ms Time] [2021-11-12 23:45:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 23:45:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 23:45:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6579520697167756) internal successors, (761), 478 states have internal predecessors, (761), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 966 transitions. [2021-11-12 23:45:27,437 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 966 transitions. Word has length 134 [2021-11-12 23:45:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:27,437 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 966 transitions. [2021-11-12 23:45:27,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 966 transitions. [2021-11-12 23:45:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 23:45:27,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:27,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:27,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:27,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:27,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -210562675, now seen corresponding path program 1 times [2021-11-12 23:45:27,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:27,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669056471] [2021-11-12 23:45:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:27,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:27,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:27,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:27,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:45:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:28,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:45:28,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:45:28,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:28,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669056471] [2021-11-12 23:45:28,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669056471] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:28,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:28,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:28,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45720481] [2021-11-12 23:45:28,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:28,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:28,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:28,946 INFO L87 Difference]: Start difference. First operand 592 states and 966 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:29,039 INFO L93 Difference]: Finished difference Result 1166 states and 1911 transitions. [2021-11-12 23:45:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:29,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2021-11-12 23:45:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:29,056 INFO L225 Difference]: With dead ends: 1166 [2021-11-12 23:45:29,056 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 23:45:29,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:29,068 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 6 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:29,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2844 Invalid, 28 Unknown, 0 Unchecked, 7.14ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 34.01ms Time] [2021-11-12 23:45:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 23:45:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 23:45:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 459 states have (on average 1.6557734204793029) internal successors, (760), 478 states have internal predecessors, (760), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 965 transitions. [2021-11-12 23:45:29,107 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 965 transitions. Word has length 135 [2021-11-12 23:45:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:29,108 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 965 transitions. [2021-11-12 23:45:29,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 965 transitions. [2021-11-12 23:45:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:45:29,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:29,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:29,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:29,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:29,359 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:29,359 INFO L85 PathProgramCache]: Analyzing trace with hash 573131045, now seen corresponding path program 1 times [2021-11-12 23:45:29,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:29,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960773864] [2021-11-12 23:45:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:29,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:29,362 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:29,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:45:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:29,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:30,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:30,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:30,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960773864] [2021-11-12 23:45:30,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960773864] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:30,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:30,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:45:30,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037371191] [2021-11-12 23:45:30,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:30,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:45:30,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:30,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:45:30,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:30,919 INFO L87 Difference]: Start difference. First operand 592 states and 965 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:31,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:31,184 INFO L93 Difference]: Finished difference Result 1183 states and 1939 transitions. [2021-11-12 23:45:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:31,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 136 [2021-11-12 23:45:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:31,195 INFO L225 Difference]: With dead ends: 1183 [2021-11-12 23:45:31,195 INFO L226 Difference]: Without dead ends: 613 [2021-11-12 23:45:31,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:45:31,216 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 148 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5587 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:31,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5587 Invalid, 85 Unknown, 0 Unchecked, 12.45ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 188.52ms Time] [2021-11-12 23:45:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-12 23:45:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 611. [2021-11-12 23:45:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 475 states have (on average 1.654736842105263) internal successors, (786), 496 states have internal predecessors, (786), 106 states have call successors, (106), 28 states have call predecessors, (106), 29 states have return successors, (104), 99 states have call predecessors, (104), 101 states have call successors, (104) [2021-11-12 23:45:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 996 transitions. [2021-11-12 23:45:31,261 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 996 transitions. Word has length 136 [2021-11-12 23:45:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:31,261 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 996 transitions. [2021-11-12 23:45:31,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 996 transitions. [2021-11-12 23:45:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:45:31,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:31,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:31,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:31,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:31,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash -67955098, now seen corresponding path program 1 times [2021-11-12 23:45:31,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:31,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246197322] [2021-11-12 23:45:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:31,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:31,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:31,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:45:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:32,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:45:32,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:45:32,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:32,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246197322] [2021-11-12 23:45:32,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246197322] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:32,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:32,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:45:32,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514681339] [2021-11-12 23:45:32,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:32,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:32,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:45:32,900 INFO L87 Difference]: Start difference. First operand 611 states and 996 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:33,020 INFO L93 Difference]: Finished difference Result 1196 states and 1961 transitions. [2021-11-12 23:45:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:45:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2021-11-12 23:45:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:33,027 INFO L225 Difference]: With dead ends: 1196 [2021-11-12 23:45:33,027 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 23:45:33,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:33,032 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 8 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.09ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:33,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2843 Invalid, 30 Unknown, 0 Unchecked, 24.09ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 51.32ms Time] [2021-11-12 23:45:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 23:45:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-12 23:45:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6553911205073997) internal successors, (783), 493 states have internal predecessors, (783), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-12 23:45:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 989 transitions. [2021-11-12 23:45:33,064 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 989 transitions. Word has length 136 [2021-11-12 23:45:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:33,065 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 989 transitions. [2021-11-12 23:45:33,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:33,065 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 989 transitions. [2021-11-12 23:45:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:45:33,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:33,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:45:33,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:33,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:33,285 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:33,285 INFO L85 PathProgramCache]: Analyzing trace with hash 695176180, now seen corresponding path program 1 times [2021-11-12 23:45:33,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:33,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729274259] [2021-11-12 23:45:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:33,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:33,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:33,287 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:33,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:45:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:33,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:34,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:45:34,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:34,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729274259] [2021-11-12 23:45:34,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729274259] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:34,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:34,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:34,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230822741] [2021-11-12 23:45:34,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:34,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:34,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:34,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:34,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:34,650 INFO L87 Difference]: Start difference. First operand 607 states and 989 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:34,935 INFO L93 Difference]: Finished difference Result 1222 states and 2006 transitions. [2021-11-12 23:45:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:34,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2021-11-12 23:45:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:34,944 INFO L225 Difference]: With dead ends: 1222 [2021-11-12 23:45:34,945 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 23:45:34,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:34,950 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 134 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.28ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:34,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2651 Invalid, 131 Unknown, 0 Unchecked, 9.28ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 218.94ms Time] [2021-11-12 23:45:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 23:45:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-12 23:45:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6448202959830867) internal successors, (778), 493 states have internal predecessors, (778), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-12 23:45:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 984 transitions. [2021-11-12 23:45:34,989 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 984 transitions. Word has length 137 [2021-11-12 23:45:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:34,989 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 984 transitions. [2021-11-12 23:45:34,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 984 transitions. [2021-11-12 23:45:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:45:34,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:34,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:45:35,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:35,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:35,221 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash -878076950, now seen corresponding path program 1 times [2021-11-12 23:45:35,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:35,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913102605] [2021-11-12 23:45:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:35,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:35,223 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:35,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:45:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:36,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:45:36,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:36,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913102605] [2021-11-12 23:45:36,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913102605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:36,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:36,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:36,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77091416] [2021-11-12 23:45:36,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:36,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:36,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:36,623 INFO L87 Difference]: Start difference. First operand 607 states and 984 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:36,895 INFO L93 Difference]: Finished difference Result 1222 states and 1996 transitions. [2021-11-12 23:45:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:36,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 139 [2021-11-12 23:45:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:36,904 INFO L225 Difference]: With dead ends: 1222 [2021-11-12 23:45:36,904 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 23:45:36,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:36,909 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 128 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.53ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:36,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2651 Invalid, 121 Unknown, 0 Unchecked, 7.53ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 199.76ms Time] [2021-11-12 23:45:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 23:45:36,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-12 23:45:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6342494714587739) internal successors, (773), 493 states have internal predecessors, (773), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-12 23:45:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 979 transitions. [2021-11-12 23:45:36,976 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 979 transitions. Word has length 139 [2021-11-12 23:45:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:36,977 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 979 transitions. [2021-11-12 23:45:36,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 979 transitions. [2021-11-12 23:45:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:45:36,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:36,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:45:37,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:37,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:37,205 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1935952428, now seen corresponding path program 1 times [2021-11-12 23:45:37,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:37,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046782673] [2021-11-12 23:45:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:37,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:37,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:37,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:37,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:45:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:38,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:45:38,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:38,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046782673] [2021-11-12 23:45:38,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046782673] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:38,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:38,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:38,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249017172] [2021-11-12 23:45:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:38,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:38,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:38,620 INFO L87 Difference]: Start difference. First operand 607 states and 979 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:38,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:38,869 INFO L93 Difference]: Finished difference Result 1243 states and 2017 transitions. [2021-11-12 23:45:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:45:38,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 141 [2021-11-12 23:45:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:38,878 INFO L225 Difference]: With dead ends: 1243 [2021-11-12 23:45:38,878 INFO L226 Difference]: Without dead ends: 637 [2021-11-12 23:45:38,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:38,883 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 143 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.56ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:38,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2661 Invalid, 131 Unknown, 0 Unchecked, 7.56ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 197.58ms Time] [2021-11-12 23:45:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-12 23:45:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 622. [2021-11-12 23:45:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 488 states have (on average 1.6147540983606556) internal successors, (788), 507 states have internal predecessors, (788), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 993 transitions. [2021-11-12 23:45:38,915 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 993 transitions. Word has length 141 [2021-11-12 23:45:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:38,915 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 993 transitions. [2021-11-12 23:45:38,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 993 transitions. [2021-11-12 23:45:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:45:38,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:38,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:45:38,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:39,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:39,159 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:39,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1637201580, now seen corresponding path program 1 times [2021-11-12 23:45:39,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:39,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88832624] [2021-11-12 23:45:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:39,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:39,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:39,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:39,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:45:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:39,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:39,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:40,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:40,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:40,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88832624] [2021-11-12 23:45:40,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88832624] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:40,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:40,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:45:40,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598433746] [2021-11-12 23:45:40,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:40,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:45:40,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:45:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:45:40,654 INFO L87 Difference]: Start difference. First operand 622 states and 993 transitions. Second operand has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:40,865 INFO L93 Difference]: Finished difference Result 1207 states and 1938 transitions. [2021-11-12 23:45:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2021-11-12 23:45:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:40,875 INFO L225 Difference]: With dead ends: 1207 [2021-11-12 23:45:40,875 INFO L226 Difference]: Without dead ends: 616 [2021-11-12 23:45:40,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:45:40,880 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 131 mSDsluCounter, 4603 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5555 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.98ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:40,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5555 Invalid, 75 Unknown, 0 Unchecked, 11.98ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 146.60ms Time] [2021-11-12 23:45:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-12 23:45:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 601. [2021-11-12 23:45:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.60813704496788) internal successors, (751), 486 states have internal predecessors, (751), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 956 transitions. [2021-11-12 23:45:40,911 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 956 transitions. Word has length 141 [2021-11-12 23:45:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:40,911 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 956 transitions. [2021-11-12 23:45:40,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:40,912 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 956 transitions. [2021-11-12 23:45:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:45:40,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:40,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:45:40,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:41,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:41,137 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:41,137 INFO L85 PathProgramCache]: Analyzing trace with hash 88504962, now seen corresponding path program 1 times [2021-11-12 23:45:41,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:41,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921391177] [2021-11-12 23:45:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:41,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:41,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:41,140 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:41,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:45:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:41,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:41,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:42,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:45:42,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:42,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921391177] [2021-11-12 23:45:42,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921391177] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:42,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:42,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:42,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368100987] [2021-11-12 23:45:42,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:42,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:42,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:42,562 INFO L87 Difference]: Start difference. First operand 601 states and 956 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:42,717 INFO L93 Difference]: Finished difference Result 1171 states and 1876 transitions. [2021-11-12 23:45:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 142 [2021-11-12 23:45:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:42,725 INFO L225 Difference]: With dead ends: 1171 [2021-11-12 23:45:42,725 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 23:45:42,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:42,731 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 69 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:42,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2675 Invalid, 54 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 111.11ms Time] [2021-11-12 23:45:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 23:45:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 23:45:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.6059957173447537) internal successors, (750), 486 states have internal predecessors, (750), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 955 transitions. [2021-11-12 23:45:42,760 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 955 transitions. Word has length 142 [2021-11-12 23:45:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:42,760 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 955 transitions. [2021-11-12 23:45:42,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 955 transitions. [2021-11-12 23:45:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:45:42,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:42,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:45:42,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:42,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:42,983 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:42,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1279406639, now seen corresponding path program 1 times [2021-11-12 23:45:42,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:42,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219894478] [2021-11-12 23:45:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:42,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:42,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:42,985 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:42,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:45:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:43,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:45:43,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:43,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:45:44,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:44,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219894478] [2021-11-12 23:45:44,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219894478] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:44,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:44,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:45:44,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446458596] [2021-11-12 23:45:44,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:44,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:45:44,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:44,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:45:44,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:45:44,415 INFO L87 Difference]: Start difference. First operand 601 states and 955 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:44,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:44,559 INFO L93 Difference]: Finished difference Result 1171 states and 1875 transitions. [2021-11-12 23:45:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:45:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2021-11-12 23:45:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:44,567 INFO L225 Difference]: With dead ends: 1171 [2021-11-12 23:45:44,568 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 23:45:44,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:44,573 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 67 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.97ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:44,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2675 Invalid, 52 Unknown, 0 Unchecked, 6.97ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 101.95ms Time] [2021-11-12 23:45:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 23:45:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 23:45:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.6038543897216273) internal successors, (749), 486 states have internal predecessors, (749), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 954 transitions. [2021-11-12 23:45:44,603 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 954 transitions. Word has length 143 [2021-11-12 23:45:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:44,603 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 954 transitions. [2021-11-12 23:45:44,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:45:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 954 transitions. [2021-11-12 23:45:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:45:44,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:44,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:45:44,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:44,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:44,825 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1895082307, now seen corresponding path program 1 times [2021-11-12 23:45:44,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:44,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649701334] [2021-11-12 23:45:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:44,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:44,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:44,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:44,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:45:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:45,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:45:45,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:45,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:46,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:46,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649701334] [2021-11-12 23:45:46,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649701334] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:46,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:46,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:45:46,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827454705] [2021-11-12 23:45:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:46,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:46,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:45:46,501 INFO L87 Difference]: Start difference. First operand 601 states and 954 transitions. Second operand has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:46,791 INFO L93 Difference]: Finished difference Result 1176 states and 1882 transitions. [2021-11-12 23:45:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:45:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 144 [2021-11-12 23:45:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:46,798 INFO L225 Difference]: With dead ends: 1176 [2021-11-12 23:45:46,798 INFO L226 Difference]: Without dead ends: 612 [2021-11-12 23:45:46,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:45:46,802 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 109 mSDsluCounter, 5312 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6208 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.40ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:46,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6208 Invalid, 152 Unknown, 0 Unchecked, 9.40ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 202.88ms Time] [2021-11-12 23:45:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-12 23:45:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 603. [2021-11-12 23:45:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 469 states have (on average 1.5991471215351811) internal successors, (750), 488 states have internal predecessors, (750), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 955 transitions. [2021-11-12 23:45:46,827 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 955 transitions. Word has length 144 [2021-11-12 23:45:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:46,827 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 955 transitions. [2021-11-12 23:45:46,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 955 transitions. [2021-11-12 23:45:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 23:45:46,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:46,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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] [2021-11-12 23:45:46,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:47,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:47,054 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1191672762, now seen corresponding path program 1 times [2021-11-12 23:45:47,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:47,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72864020] [2021-11-12 23:45:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:47,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:47,061 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:47,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:45:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:45:47,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:45:47,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:48,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:48,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72864020] [2021-11-12 23:45:48,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72864020] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:48,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:48,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:45:48,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631307999] [2021-11-12 23:45:48,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:48,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:48,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:45:48,582 INFO L87 Difference]: Start difference. First operand 603 states and 955 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:48,878 INFO L93 Difference]: Finished difference Result 1168 states and 1863 transitions. [2021-11-12 23:45:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:45:48,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 145 [2021-11-12 23:45:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:48,886 INFO L225 Difference]: With dead ends: 1168 [2021-11-12 23:45:48,886 INFO L226 Difference]: Without dead ends: 608 [2021-11-12 23:45:48,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:45:48,891 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 77 mSDsluCounter, 5318 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6216 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.99ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:48,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6216 Invalid, 152 Unknown, 0 Unchecked, 9.99ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 199.76ms Time] [2021-11-12 23:45:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-12 23:45:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2021-11-12 23:45:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 471 states have (on average 1.59447983014862) internal successors, (751), 490 states have internal predecessors, (751), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 956 transitions. [2021-11-12 23:45:48,923 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 956 transitions. Word has length 145 [2021-11-12 23:45:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:48,923 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 956 transitions. [2021-11-12 23:45:48,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:45:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 956 transitions. [2021-11-12 23:45:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 23:45:48,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:48,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2021-11-12 23:45:48,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:49,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:49,145 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:49,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1921082585, now seen corresponding path program 1 times [2021-11-12 23:45:49,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:49,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900326396] [2021-11-12 23:45:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:49,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:49,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:49,148 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:49,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:45:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:50,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:50,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:50,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900326396] [2021-11-12 23:45:50,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900326396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:50,584 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:50,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:45:50,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057967716] [2021-11-12 23:45:50,585 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:50,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:45:50,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:45:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:50,587 INFO L87 Difference]: Start difference. First operand 605 states and 956 transitions. Second operand has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:45:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:50,774 INFO L93 Difference]: Finished difference Result 1114 states and 1790 transitions. [2021-11-12 23:45:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:45:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 146 [2021-11-12 23:45:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:50,783 INFO L225 Difference]: With dead ends: 1114 [2021-11-12 23:45:50,783 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 23:45:50,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:45:50,788 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 109 mSDsluCounter, 5439 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6349 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:50,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6349 Invalid, 106 Unknown, 0 Unchecked, 8.71ms Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 131.48ms Time] [2021-11-12 23:45:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 23:45:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-11-12 23:45:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 464 states have (on average 1.6012931034482758) internal successors, (743), 483 states have internal predecessors, (743), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 948 transitions. [2021-11-12 23:45:50,818 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 948 transitions. Word has length 146 [2021-11-12 23:45:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:50,818 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 948 transitions. [2021-11-12 23:45:50,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:45:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 948 transitions. [2021-11-12 23:45:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:45:50,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:50,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:50,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:51,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:51,041 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1413226512, now seen corresponding path program 1 times [2021-11-12 23:45:51,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:51,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642188737] [2021-11-12 23:45:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:51,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:51,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:51,043 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:51,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:45:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:51,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:52,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:52,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642188737] [2021-11-12 23:45:52,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642188737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:52,479 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:52,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:45:52,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101046554] [2021-11-12 23:45:52,480 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:52,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:45:52,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:45:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:45:52,482 INFO L87 Difference]: Start difference. First operand 598 states and 948 transitions. Second operand has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:45:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:52,684 INFO L93 Difference]: Finished difference Result 1119 states and 1804 transitions. [2021-11-12 23:45:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:52,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 147 [2021-11-12 23:45:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:52,695 INFO L225 Difference]: With dead ends: 1119 [2021-11-12 23:45:52,695 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 23:45:52,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:45:52,700 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 171 mSDsluCounter, 5393 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6295 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.35ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:52,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6295 Invalid, 95 Unknown, 0 Unchecked, 13.35ms Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 144.85ms Time] [2021-11-12 23:45:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 23:45:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 23:45:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 461 states have (on average 1.6008676789587852) internal successors, (738), 480 states have internal predecessors, (738), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 943 transitions. [2021-11-12 23:45:52,728 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 943 transitions. Word has length 147 [2021-11-12 23:45:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:52,728 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 943 transitions. [2021-11-12 23:45:52,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:45:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 943 transitions. [2021-11-12 23:45:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:45:52,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:52,735 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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] [2021-11-12 23:45:52,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:52,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:52,966 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash 152738960, now seen corresponding path program 1 times [2021-11-12 23:45:52,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:52,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781580448] [2021-11-12 23:45:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:52,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:52,968 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:52,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:45:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:45:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:53,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:54,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:54,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781580448] [2021-11-12 23:45:54,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781580448] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:54,348 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:54,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:45:54,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233811283] [2021-11-12 23:45:54,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:54,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:45:54,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:54,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:45:54,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:45:54,351 INFO L87 Difference]: Start difference. First operand 595 states and 943 transitions. Second operand has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:45:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:54,506 INFO L93 Difference]: Finished difference Result 1116 states and 1799 transitions. [2021-11-12 23:45:54,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:45:54,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 147 [2021-11-12 23:45:54,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:54,513 INFO L225 Difference]: With dead ends: 1116 [2021-11-12 23:45:54,514 INFO L226 Difference]: Without dead ends: 587 [2021-11-12 23:45:54,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:45:54,518 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 176 mSDsluCounter, 3583 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 4484 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:54,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 4484 Invalid, 63 Unknown, 0 Unchecked, 5.43ms Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 114.42ms Time] [2021-11-12 23:45:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-12 23:45:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2021-11-12 23:45:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 453 states have (on average 1.6048565121412803) internal successors, (727), 472 states have internal predecessors, (727), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 932 transitions. [2021-11-12 23:45:54,546 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 932 transitions. Word has length 147 [2021-11-12 23:45:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:54,547 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 932 transitions. [2021-11-12 23:45:54,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:45:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 932 transitions. [2021-11-12 23:45:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:45:54,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:54,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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] [2021-11-12 23:45:54,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:54,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:54,769 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash 709291115, now seen corresponding path program 1 times [2021-11-12 23:45:54,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:54,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104509470] [2021-11-12 23:45:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:54,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:54,771 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:54,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:45:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:55,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:45:55,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:55,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:56,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:56,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104509470] [2021-11-12 23:45:56,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104509470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:56,341 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:56,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:45:56,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502872817] [2021-11-12 23:45:56,341 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:56,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:45:56,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:45:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:45:56,343 INFO L87 Difference]: Start difference. First operand 587 states and 932 transitions. Second operand has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:45:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:56,600 INFO L93 Difference]: Finished difference Result 1102 states and 1777 transitions. [2021-11-12 23:45:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:45:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 148 [2021-11-12 23:45:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:56,608 INFO L225 Difference]: With dead ends: 1102 [2021-11-12 23:45:56,608 INFO L226 Difference]: Without dead ends: 587 [2021-11-12 23:45:56,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:45:56,612 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 67 mSDsluCounter, 8815 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 9712 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.92ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 184.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:56,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 9712 Invalid, 158 Unknown, 0 Unchecked, 10.92ms Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 184.00ms Time] [2021-11-12 23:45:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-12 23:45:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2021-11-12 23:45:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 453 states have (on average 1.6026490066225165) internal successors, (726), 472 states have internal predecessors, (726), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 931 transitions. [2021-11-12 23:45:56,638 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 931 transitions. Word has length 148 [2021-11-12 23:45:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:56,638 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 931 transitions. [2021-11-12 23:45:56,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:45:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 931 transitions. [2021-11-12 23:45:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:45:56,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:56,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2021-11-12 23:45:56,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:56,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:56,869 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash 82162414, now seen corresponding path program 1 times [2021-11-12 23:45:56,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:56,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213234122] [2021-11-12 23:45:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:56,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:56,871 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:56,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:45:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:45:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:57,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:58,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:58,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213234122] [2021-11-12 23:45:58,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213234122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:58,468 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:58,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:45:58,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277019603] [2021-11-12 23:45:58,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:58,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:45:58,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:45:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:45:58,470 INFO L87 Difference]: Start difference. First operand 587 states and 931 transitions. Second operand has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:45:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:58,744 INFO L93 Difference]: Finished difference Result 1146 states and 1834 transitions. [2021-11-12 23:45:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:45:58,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 149 [2021-11-12 23:45:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:58,751 INFO L225 Difference]: With dead ends: 1146 [2021-11-12 23:45:58,751 INFO L226 Difference]: Without dead ends: 584 [2021-11-12 23:45:58,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:45:58,755 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 101 mSDsluCounter, 8740 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 9625 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:58,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 9625 Invalid, 151 Unknown, 0 Unchecked, 10.12ms Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 190.81ms Time] [2021-11-12 23:45:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-12 23:45:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2021-11-12 23:45:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 450 states have (on average 1.5955555555555556) internal successors, (718), 469 states have internal predecessors, (718), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:45:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 923 transitions. [2021-11-12 23:45:58,782 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 923 transitions. Word has length 149 [2021-11-12 23:45:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:58,782 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 923 transitions. [2021-11-12 23:45:58,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:45:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 923 transitions. [2021-11-12 23:45:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:45:58,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:58,789 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:45:58,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:59,013 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:45:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1497165040, now seen corresponding path program 1 times [2021-11-12 23:45:59,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:59,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671910763] [2021-11-12 23:45:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:59,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:59,015 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:59,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:45:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:59,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:45:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:45:59,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:46:00,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:00,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671910763] [2021-11-12 23:46:00,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671910763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:00,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:46:00,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:46:00,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643707882] [2021-11-12 23:46:00,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:00,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:46:00,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:46:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:46:00,503 INFO L87 Difference]: Start difference. First operand 584 states and 923 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:46:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:00,791 INFO L93 Difference]: Finished difference Result 1093 states and 1757 transitions. [2021-11-12 23:46:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:46:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 150 [2021-11-12 23:46:00,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:00,799 INFO L225 Difference]: With dead ends: 1093 [2021-11-12 23:46:00,800 INFO L226 Difference]: Without dead ends: 584 [2021-11-12 23:46:00,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:46:00,805 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 82 mSDsluCounter, 6157 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 7043 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.64ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 184.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:00,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 7043 Invalid, 132 Unknown, 0 Unchecked, 9.64ms Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 184.53ms Time] [2021-11-12 23:46:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-12 23:46:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2021-11-12 23:46:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 450 states have (on average 1.5933333333333333) internal successors, (717), 469 states have internal predecessors, (717), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:46:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 922 transitions. [2021-11-12 23:46:00,860 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 922 transitions. Word has length 150 [2021-11-12 23:46:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:00,861 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 922 transitions. [2021-11-12 23:46:00,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:46:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 922 transitions. [2021-11-12 23:46:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:46:00,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:00,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:46:00,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:01,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:01,092 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash -376832801, now seen corresponding path program 1 times [2021-11-12 23:46:01,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:01,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243152274] [2021-11-12 23:46:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:01,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:01,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:01,095 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:01,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:46:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:46:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:46:01,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:46:02,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:02,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243152274] [2021-11-12 23:46:02,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243152274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:02,489 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:46:02,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:46:02,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133341716] [2021-11-12 23:46:02,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:02,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:46:02,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:46:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:46:02,491 INFO L87 Difference]: Start difference. First operand 584 states and 922 transitions. Second operand has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:46:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:02,723 INFO L93 Difference]: Finished difference Result 1131 states and 1802 transitions. [2021-11-12 23:46:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:46:02,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 151 [2021-11-12 23:46:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:02,731 INFO L225 Difference]: With dead ends: 1131 [2021-11-12 23:46:02,731 INFO L226 Difference]: Without dead ends: 581 [2021-11-12 23:46:02,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:46:02,736 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 113 mSDsluCounter, 7013 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 7897 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.80ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:02,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 7897 Invalid, 137 Unknown, 0 Unchecked, 8.80ms Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 153.98ms Time] [2021-11-12 23:46:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-12 23:46:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2021-11-12 23:46:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 447 states have (on average 1.5861297539149888) internal successors, (709), 466 states have internal predecessors, (709), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:46:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 914 transitions. [2021-11-12 23:46:02,762 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 914 transitions. Word has length 151 [2021-11-12 23:46:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:02,762 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 914 transitions. [2021-11-12 23:46:02,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:46:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 914 transitions. [2021-11-12 23:46:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:46:02,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:02,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2021-11-12 23:46:02,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:02,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:02,985 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:02,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1757515659, now seen corresponding path program 1 times [2021-11-12 23:46:02,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:02,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117199380] [2021-11-12 23:46:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:02,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:02,987 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:02,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:46:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:46:04,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:46:04,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:04,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117199380] [2021-11-12 23:46:04,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117199380] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:04,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:04,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:46:04,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752521873] [2021-11-12 23:46:04,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:04,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:04,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:04,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:46:04,665 INFO L87 Difference]: Start difference. First operand 581 states and 914 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:46:06,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:08,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:09,862 INFO L93 Difference]: Finished difference Result 1086 states and 1769 transitions. [2021-11-12 23:46:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:09,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 152 [2021-11-12 23:46:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:09,868 INFO L225 Difference]: With dead ends: 1086 [2021-11-12 23:46:09,869 INFO L226 Difference]: Without dead ends: 585 [2021-11-12 23:46:09,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:09,873 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 827 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4974.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.11ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5118.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:09,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 2232 Invalid, 473 Unknown, 0 Unchecked, 14.11ms Time], IncrementalHoareTripleChecker [16 Valid, 455 Invalid, 2 Unknown, 0 Unchecked, 5118.74ms Time] [2021-11-12 23:46:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-12 23:46:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2021-11-12 23:46:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 450 states have (on average 1.5822222222222222) internal successors, (712), 469 states have internal predecessors, (712), 105 states have call successors, (105), 30 states have call predecessors, (105), 29 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-12 23:46:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 918 transitions. [2021-11-12 23:46:09,899 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 918 transitions. Word has length 152 [2021-11-12 23:46:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:09,899 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 918 transitions. [2021-11-12 23:46:09,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:46:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 918 transitions. [2021-11-12 23:46:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:46:09,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:09,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:46:09,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:10,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:10,118 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:10,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1096109369, now seen corresponding path program 1 times [2021-11-12 23:46:10,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:10,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355327271] [2021-11-12 23:46:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:10,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:10,120 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:10,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:46:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:10,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:46:11,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:46:11,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:11,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355327271] [2021-11-12 23:46:11,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355327271] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:11,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:11,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:46:11,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675532368] [2021-11-12 23:46:11,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:11,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:11,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:46:11,710 INFO L87 Difference]: Start difference. First operand 585 states and 918 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:46:13,744 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:15,751 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 23:46:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:16,874 INFO L93 Difference]: Finished difference Result 1095 states and 1776 transitions. [2021-11-12 23:46:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 154 [2021-11-12 23:46:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:16,881 INFO L225 Difference]: With dead ends: 1095 [2021-11-12 23:46:16,881 INFO L226 Difference]: Without dead ends: 590 [2021-11-12 23:46:16,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:16,886 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 815 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4951.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.37ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5095.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:16,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 2233 Invalid, 475 Unknown, 0 Unchecked, 10.37ms Time], IncrementalHoareTripleChecker [14 Valid, 459 Invalid, 2 Unknown, 0 Unchecked, 5095.68ms Time] [2021-11-12 23:46:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-12 23:46:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-11-12 23:46:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 454 states have (on average 1.577092511013216) internal successors, (716), 473 states have internal predecessors, (716), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (102), 98 states have call predecessors, (102), 100 states have call successors, (102) [2021-11-12 23:46:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 923 transitions. [2021-11-12 23:46:16,914 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 923 transitions. Word has length 154 [2021-11-12 23:46:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:16,914 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 923 transitions. [2021-11-12 23:46:16,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:46:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 923 transitions. [2021-11-12 23:46:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:46:16,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:16,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:46:16,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:17,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:17,134 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash 420950325, now seen corresponding path program 1 times [2021-11-12 23:46:17,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:17,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426083249] [2021-11-12 23:46:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:17,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:17,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:17,136 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:17,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:46:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:17,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:17,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:46:18,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:46:18,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:18,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426083249] [2021-11-12 23:46:18,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426083249] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:18,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:18,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:46:18,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427468154] [2021-11-12 23:46:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:18,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:18,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:18,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:18,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:46:18,917 INFO L87 Difference]: Start difference. First operand 590 states and 923 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:46:20,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:22,958 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 23:46:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:24,058 INFO L93 Difference]: Finished difference Result 1106 states and 1785 transitions. [2021-11-12 23:46:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 156 [2021-11-12 23:46:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:24,064 INFO L225 Difference]: With dead ends: 1106 [2021-11-12 23:46:24,064 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 23:46:24,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:24,069 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 819 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4937.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.83ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5076.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:24,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 2233 Invalid, 474 Unknown, 0 Unchecked, 8.83ms Time], IncrementalHoareTripleChecker [12 Valid, 460 Invalid, 2 Unknown, 0 Unchecked, 5076.34ms Time] [2021-11-12 23:46:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 23:46:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 23:46:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 459 states have (on average 1.5708061002178648) internal successors, (721), 478 states have internal predecessors, (721), 105 states have call successors, (105), 32 states have call predecessors, (105), 31 states have return successors, (103), 98 states have call predecessors, (103), 100 states have call successors, (103) [2021-11-12 23:46:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 929 transitions. [2021-11-12 23:46:24,095 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 929 transitions. Word has length 156 [2021-11-12 23:46:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:24,096 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 929 transitions. [2021-11-12 23:46:24,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:46:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 929 transitions. [2021-11-12 23:46:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:46:24,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:24,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:46:24,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:24,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:24,317 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 469638257, now seen corresponding path program 1 times [2021-11-12 23:46:24,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:24,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995946034] [2021-11-12 23:46:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:24,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:24,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:24,320 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:24,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:46:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:46:25,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:46:25,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:25,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995946034] [2021-11-12 23:46:25,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995946034] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:25,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:25,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:46:25,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333702792] [2021-11-12 23:46:25,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:25,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:25,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:25,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:25,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:46:25,993 INFO L87 Difference]: Start difference. First operand 596 states and 929 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:46:28,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:30,032 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 23:46:30,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:30,994 INFO L93 Difference]: Finished difference Result 1119 states and 1796 transitions. [2021-11-12 23:46:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:30,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 158 [2021-11-12 23:46:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:30,999 INFO L225 Difference]: With dead ends: 1119 [2021-11-12 23:46:31,000 INFO L226 Difference]: Without dead ends: 603 [2021-11-12 23:46:31,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:31,003 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 820 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4804.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.32ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4941.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:31,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 2233 Invalid, 473 Unknown, 0 Unchecked, 6.32ms Time], IncrementalHoareTripleChecker [10 Valid, 461 Invalid, 2 Unknown, 0 Unchecked, 4941.87ms Time] [2021-11-12 23:46:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-12 23:46:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2021-11-12 23:46:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 465 states have (on average 1.5634408602150538) internal successors, (727), 484 states have internal predecessors, (727), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (104), 98 states have call predecessors, (104), 100 states have call successors, (104) [2021-11-12 23:46:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 936 transitions. [2021-11-12 23:46:31,026 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 936 transitions. Word has length 158 [2021-11-12 23:46:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:31,026 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 936 transitions. [2021-11-12 23:46:31,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:46:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 936 transitions. [2021-11-12 23:46:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 23:46:31,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:31,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:46:31,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:31,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:31,245 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash -201027595, now seen corresponding path program 1 times [2021-11-12 23:46:31,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:31,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716162209] [2021-11-12 23:46:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:31,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:31,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:31,249 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:31,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:46:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:46:31,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:46:32,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:46:33,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:33,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716162209] [2021-11-12 23:46:33,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716162209] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:33,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1626562144] [2021-11-12 23:46:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:33,783 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:33,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:33,785 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:33,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:46:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:34,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:46:34,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:46:34,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:46:35,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1626562144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:35,706 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:46:35,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:46:35,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434065526] [2021-11-12 23:46:35,707 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:35,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:35,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:35,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:35,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:46:35,708 INFO L87 Difference]: Start difference. First operand 603 states and 936 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:46:37,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:38,382 INFO L93 Difference]: Finished difference Result 1122 states and 1779 transitions. [2021-11-12 23:46:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:46:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 160 [2021-11-12 23:46:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:38,388 INFO L225 Difference]: With dead ends: 1122 [2021-11-12 23:46:38,389 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 23:46:38,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:46:38,393 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 1313 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 381 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2512.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.10ms SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2615.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:38,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 806 Invalid, 488 Unknown, 0 Unchecked, 5.10ms Time], IncrementalHoareTripleChecker [381 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 2615.38ms Time] [2021-11-12 23:46:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 23:46:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-12 23:46:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 463 states have (on average 1.5593952483801297) internal successors, (722), 481 states have internal predecessors, (722), 103 states have call successors, (103), 33 states have call predecessors, (103), 32 states have return successors, (103), 97 states have call predecessors, (103), 99 states have call successors, (103) [2021-11-12 23:46:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 928 transitions. [2021-11-12 23:46:38,422 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 928 transitions. Word has length 160 [2021-11-12 23:46:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:38,423 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 928 transitions. [2021-11-12 23:46:38,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:46:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 928 transitions. [2021-11-12 23:46:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 23:46:38,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:38,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:46:38,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:38,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-12 23:46:38,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:38,841 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:46:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1937043287, now seen corresponding path program 1 times [2021-11-12 23:46:38,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:38,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643291333] [2021-11-12 23:46:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:38,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:38,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:38,844 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:38,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:46:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:39,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:46:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:46:40,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:46:41,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:41,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643291333] [2021-11-12 23:46:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643291333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:41,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2030458737] [2021-11-12 23:46:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:41,585 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:41,587 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:41,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:46:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:46:42,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:46:42,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:46:43,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2030458737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:43,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128219298] [2021-11-12 23:46:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:43,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:46:43,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:46:43,659 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:46:43,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 23:46:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:43,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:46:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:46:44,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:46:45,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128219298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:45,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:46:45,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:46:45,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247670460] [2021-11-12 23:46:45,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:46:45,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:46:45,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:45,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:46:45,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:46:45,577 INFO L87 Difference]: Start difference. First operand 599 states and 928 transitions. Second operand has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:46:47,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:49,611 WARN L515 Checker$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 23:46:51,616 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:53,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:55,628 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:46:57,634 WARN L515 Checker$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 23:46:59,640 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:01,646 WARN L515 Checker$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 23:47:03,653 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 23:47:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:17,271 INFO L93 Difference]: Finished difference Result 1902 states and 3071 transitions. [2021-11-12 23:47:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:47:17,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 161 [2021-11-12 23:47:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:17,286 INFO L225 Difference]: With dead ends: 1902 [2021-11-12 23:47:17,286 INFO L226 Difference]: Without dead ends: 1383 [2021-11-12 23:47:17,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 946 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:47:17,299 INFO L933 BasicCegarLoop]: 1773 mSDtfsCounter, 5349 mSDsluCounter, 5928 mSDsCounter, 0 mSdLazyCounter, 11032 mSolverCounterSat, 2061 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29508.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5433 SdHoareTripleChecker+Valid, 7701 SdHoareTripleChecker+Invalid, 13102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 72.40ms SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 11032 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31153.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:17,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5433 Valid, 7701 Invalid, 13102 Unknown, 0 Unchecked, 72.40ms Time], IncrementalHoareTripleChecker [2061 Valid, 11032 Invalid, 9 Unknown, 0 Unchecked, 31153.79ms Time] [2021-11-12 23:47:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-11-12 23:47:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1233. [2021-11-12 23:47:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 932 states have (on average 1.5804721030042919) internal successors, (1473), 971 states have internal predecessors, (1473), 235 states have call successors, (235), 59 states have call predecessors, (235), 65 states have return successors, (258), 233 states have call predecessors, (258), 231 states have call successors, (258) [2021-11-12 23:47:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1966 transitions. [2021-11-12 23:47:17,395 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1966 transitions. Word has length 161 [2021-11-12 23:47:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:17,396 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 1966 transitions. [2021-11-12 23:47:17,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:47:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1966 transitions. [2021-11-12 23:47:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:47:17,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:17,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:47:17,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:17,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-12 23:47:17,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:18,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:18,026 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1394864869, now seen corresponding path program 1 times [2021-11-12 23:47:18,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:18,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187780128] [2021-11-12 23:47:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:18,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:18,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:18,028 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:18,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:47:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:18,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:47:18,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:47:18,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:47:19,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:19,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187780128] [2021-11-12 23:47:19,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187780128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:19,493 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:19,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:47:19,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857911603] [2021-11-12 23:47:19,493 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:19,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:47:19,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:47:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:47:19,495 INFO L87 Difference]: Start difference. First operand 1233 states and 1966 transitions. Second operand has 10 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:47:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:19,755 INFO L93 Difference]: Finished difference Result 1755 states and 2805 transitions. [2021-11-12 23:47:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:47:19,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 163 [2021-11-12 23:47:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:19,763 INFO L225 Difference]: With dead ends: 1755 [2021-11-12 23:47:19,763 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 23:47:19,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:47:19,770 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 76 mSDsluCounter, 5988 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6855 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.68ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:19,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 6855 Invalid, 103 Unknown, 0 Unchecked, 7.68ms Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 145.17ms Time] [2021-11-12 23:47:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 23:47:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 23:47:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 458 states have (on average 1.554585152838428) internal successors, (712), 476 states have internal predecessors, (712), 101 states have call successors, (101), 33 states have call predecessors, (101), 32 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-12 23:47:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 914 transitions. [2021-11-12 23:47:19,805 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 914 transitions. Word has length 163 [2021-11-12 23:47:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:19,806 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 914 transitions. [2021-11-12 23:47:19,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:47:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 914 transitions. [2021-11-12 23:47:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 23:47:19,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:19,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:47:19,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:20,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:20,034 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1334925208, now seen corresponding path program 1 times [2021-11-12 23:47:20,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:20,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767604792] [2021-11-12 23:47:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:20,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:20,037 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:20,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:47:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:47:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:47:21,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:47:22,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:22,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767604792] [2021-11-12 23:47:22,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767604792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:22,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1241841515] [2021-11-12 23:47:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:22,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:22,318 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:22,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 23:47:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:47:22,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:47:23,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:47:24,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1241841515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:24,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923862186] [2021-11-12 23:47:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:24,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:24,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:24,365 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:24,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 23:47:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:47:24,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:47:25,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:47:26,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923862186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:26,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:47:26,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:47:26,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655564334] [2021-11-12 23:47:26,197 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:26,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:47:26,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:47:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:47:26,199 INFO L87 Difference]: Start difference. First operand 592 states and 914 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:47:28,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:30,252 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:32,258 WARN L515 Checker$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 23:47:34,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:36,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:39,712 INFO L93 Difference]: Finished difference Result 1113 states and 1759 transitions. [2021-11-12 23:47:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:47:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) Word has length 169 [2021-11-12 23:47:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:39,719 INFO L225 Difference]: With dead ends: 1113 [2021-11-12 23:47:39,720 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 23:47:39,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:47:39,724 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1329 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 388 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12913.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.92ms SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13363.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:39,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1329 Valid, 2284 Invalid, 3437 Unknown, 0 Unchecked, 16.92ms Time], IncrementalHoareTripleChecker [388 Valid, 3044 Invalid, 5 Unknown, 0 Unchecked, 13363.44ms Time] [2021-11-12 23:47:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 23:47:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 596. [2021-11-12 23:47:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 461 states have (on average 1.5509761388286334) internal successors, (715), 479 states have internal predecessors, (715), 101 states have call successors, (101), 33 states have call predecessors, (101), 33 states have return successors, (106), 96 states have call predecessors, (106), 97 states have call successors, (106) [2021-11-12 23:47:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 922 transitions. [2021-11-12 23:47:39,761 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 922 transitions. Word has length 169 [2021-11-12 23:47:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:39,762 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 922 transitions. [2021-11-12 23:47:39,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:47:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 922 transitions. [2021-11-12 23:47:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:47:39,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:39,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:47:39,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:39,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:40,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-12 23:47:40,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:40,389 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash 481778359, now seen corresponding path program 1 times [2021-11-12 23:47:40,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:40,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872333990] [2021-11-12 23:47:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:40,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:40,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:40,392 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:40,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:47:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:47:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:47:41,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:47:42,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:42,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872333990] [2021-11-12 23:47:42,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872333990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:42,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [808273614] [2021-11-12 23:47:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:42,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:42,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:47:42,108 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:47:42,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:47:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:47:42,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:47:43,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:47:43,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [808273614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:43,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644533752] [2021-11-12 23:47:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:43,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:47:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:47:43,812 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:47:43,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-12 23:47:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:47:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:47:44,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:47:45,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644533752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:47:45,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:47:45,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:47:45,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241256572] [2021-11-12 23:47:45,133 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:47:45,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:47:45,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:47:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:47:45,134 INFO L87 Difference]: Start difference. First operand 596 states and 922 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-12 23:47:47,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:49,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:55,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:55,875 INFO L93 Difference]: Finished difference Result 2143 states and 3445 transitions. [2021-11-12 23:47:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:47:55,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) Word has length 170 [2021-11-12 23:47:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:55,891 INFO L225 Difference]: With dead ends: 2143 [2021-11-12 23:47:55,891 INFO L226 Difference]: Without dead ends: 1625 [2021-11-12 23:47:55,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1014 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:47:55,896 INFO L933 BasicCegarLoop]: 1401 mSDtfsCounter, 5712 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 4328 mSolverCounterSat, 1729 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9476.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5801 SdHoareTripleChecker+Valid, 3014 SdHoareTripleChecker+Invalid, 6059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.60ms SdHoareTripleChecker+Time, 1729 IncrementalHoareTripleChecker+Valid, 4328 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10331.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:55,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5801 Valid, 3014 Invalid, 6059 Unknown, 0 Unchecked, 38.60ms Time], IncrementalHoareTripleChecker [1729 Valid, 4328 Invalid, 2 Unknown, 0 Unchecked, 10331.34ms Time] [2021-11-12 23:47:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-11-12 23:47:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1567. [2021-11-12 23:47:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1203 states have (on average 1.57190357439734) internal successors, (1891), 1248 states have internal predecessors, (1891), 277 states have call successors, (277), 86 states have call predecessors, (277), 86 states have return successors, (312), 269 states have call predecessors, (312), 273 states have call successors, (312) [2021-11-12 23:47:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2480 transitions. [2021-11-12 23:47:55,997 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2480 transitions. Word has length 170 [2021-11-12 23:47:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:55,998 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 2480 transitions. [2021-11-12 23:47:55,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-12 23:47:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2480 transitions. [2021-11-12 23:47:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 23:47:56,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:56,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:47:56,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:56,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 23:47:56,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:56,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:47:56,629 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:47:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:56,629 INFO L85 PathProgramCache]: Analyzing trace with hash 632402719, now seen corresponding path program 1 times [2021-11-12 23:47:56,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:56,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149468023] [2021-11-12 23:47:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:56,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:56,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:56,631 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:56,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:47:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:47:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:48:00,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:48:05,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:05,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149468023] [2021-11-12 23:48:05,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149468023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:05,508 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:48:05,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-12 23:48:05,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617207652] [2021-11-12 23:48:05,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:05,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:48:05,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:48:05,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:48:05,510 INFO L87 Difference]: Start difference. First operand 1567 states and 2480 transitions. Second operand has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-12 23:48:07,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:09,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:11,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:13,567 WARN L515 Checker$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 23:48:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:24,111 INFO L93 Difference]: Finished difference Result 7301 states and 11815 transitions. [2021-11-12 23:48:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:48:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) Word has length 172 [2021-11-12 23:48:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:24,164 INFO L225 Difference]: With dead ends: 7301 [2021-11-12 23:48:24,165 INFO L226 Difference]: Without dead ends: 5812 [2021-11-12 23:48:24,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:48:24,175 INFO L933 BasicCegarLoop]: 1532 mSDtfsCounter, 7930 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 6125 mSolverCounterSat, 2187 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16207.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8048 SdHoareTripleChecker+Valid, 3451 SdHoareTripleChecker+Invalid, 8316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.42ms SdHoareTripleChecker+Time, 2187 IncrementalHoareTripleChecker+Valid, 6125 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17551.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:24,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8048 Valid, 3451 Invalid, 8316 Unknown, 0 Unchecked, 47.42ms Time], IncrementalHoareTripleChecker [2187 Valid, 6125 Invalid, 4 Unknown, 0 Unchecked, 17551.82ms Time] [2021-11-12 23:48:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-11-12 23:48:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5459. [2021-11-12 23:48:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5459 states, 4175 states have (on average 1.5952095808383233) internal successors, (6660), 4331 states have internal predecessors, (6660), 1005 states have call successors, (1005), 281 states have call predecessors, (1005), 278 states have return successors, (1133), 915 states have call predecessors, (1133), 1001 states have call successors, (1133) [2021-11-12 23:48:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5459 states to 5459 states and 8798 transitions. [2021-11-12 23:48:24,662 INFO L78 Accepts]: Start accepts. Automaton has 5459 states and 8798 transitions. Word has length 172 [2021-11-12 23:48:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:24,662 INFO L470 AbstractCegarLoop]: Abstraction has 5459 states and 8798 transitions. [2021-11-12 23:48:24,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-12 23:48:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5459 states and 8798 transitions. [2021-11-12 23:48:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 23:48:24,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:24,666 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:48:24,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:24,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:24,889 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:48:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 712897035, now seen corresponding path program 1 times [2021-11-12 23:48:24,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:24,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803967085] [2021-11-12 23:48:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:24,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:24,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:24,891 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:24,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:48:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:48:25,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:48:26,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:48:26,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:26,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803967085] [2021-11-12 23:48:26,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803967085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:26,883 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:48:26,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:48:26,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818308628] [2021-11-12 23:48:26,885 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:26,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:48:26,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:48:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:48:26,890 INFO L87 Difference]: Start difference. First operand 5459 states and 8798 transitions. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:48:28,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:30,941 WARN L515 Checker$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 23:48:32,947 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 23:48:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:42,505 INFO L93 Difference]: Finished difference Result 16626 states and 27449 transitions. [2021-11-12 23:48:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:48:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) Word has length 176 [2021-11-12 23:48:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:42,585 INFO L225 Difference]: With dead ends: 16626 [2021-11-12 23:48:42,585 INFO L226 Difference]: Without dead ends: 11227 [2021-11-12 23:48:42,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:48:42,609 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 3293 mSDsluCounter, 2605 mSDsCounter, 0 mSdLazyCounter, 7133 mSolverCounterSat, 991 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13543.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3407 SdHoareTripleChecker+Valid, 4211 SdHoareTripleChecker+Invalid, 8127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.03ms SdHoareTripleChecker+Time, 991 IncrementalHoareTripleChecker+Valid, 7133 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14641.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:42,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3407 Valid, 4211 Invalid, 8127 Unknown, 0 Unchecked, 39.03ms Time], IncrementalHoareTripleChecker [991 Valid, 7133 Invalid, 3 Unknown, 0 Unchecked, 14641.66ms Time] [2021-11-12 23:48:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11227 states. [2021-11-12 23:48:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11227 to 10212. [2021-11-12 23:48:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10212 states, 7669 states have (on average 1.58638675185813) internal successors, (12166), 8008 states have internal predecessors, (12166), 2033 states have call successors, (2033), 476 states have call predecessors, (2033), 509 states have return successors, (2375), 1894 states have call predecessors, (2375), 2029 states have call successors, (2375) [2021-11-12 23:48:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10212 states to 10212 states and 16574 transitions. [2021-11-12 23:48:43,714 INFO L78 Accepts]: Start accepts. Automaton has 10212 states and 16574 transitions. Word has length 176 [2021-11-12 23:48:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:43,715 INFO L470 AbstractCegarLoop]: Abstraction has 10212 states and 16574 transitions. [2021-11-12 23:48:43,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:48:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 10212 states and 16574 transitions. [2021-11-12 23:48:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 23:48:43,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:43,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:48:43,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:43,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:43,945 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:48:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash -503256691, now seen corresponding path program 1 times [2021-11-12 23:48:43,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:43,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614835856] [2021-11-12 23:48:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:43,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:43,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:43,949 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:48:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:48:44,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:48:45,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:48:46,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:46,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614835856] [2021-11-12 23:48:46,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614835856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:46,575 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:48:46,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-12 23:48:46,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914804688] [2021-11-12 23:48:46,575 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:46,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:48:46,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:46,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:48:46,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:48:46,577 INFO L87 Difference]: Start difference. First operand 10212 states and 16574 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:48:48,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:50,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:52,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:54,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:48:56,624 WARN L515 Checker$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 23:48:58,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:03,878 INFO L93 Difference]: Finished difference Result 17764 states and 28833 transitions. [2021-11-12 23:49:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:49:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) Word has length 176 [2021-11-12 23:49:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:03,952 INFO L225 Difference]: With dead ends: 17764 [2021-11-12 23:49:03,952 INFO L226 Difference]: Without dead ends: 10182 [2021-11-12 23:49:03,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:49:03,987 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 1322 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 382 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15961.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 3170 SdHoareTripleChecker+Invalid, 5063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.56ms SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16553.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:03,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 3170 Invalid, 5063 Unknown, 0 Unchecked, 22.56ms Time], IncrementalHoareTripleChecker [382 Valid, 4675 Invalid, 6 Unknown, 0 Unchecked, 16553.34ms Time] [2021-11-12 23:49:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10182 states. [2021-11-12 23:49:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10182 to 10182. [2021-11-12 23:49:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 7654 states have (on average 1.5855761693232298) internal successors, (12136), 7993 states have internal predecessors, (12136), 2018 states have call successors, (2018), 476 states have call predecessors, (2018), 509 states have return successors, (2360), 1879 states have call predecessors, (2360), 2014 states have call successors, (2360) [2021-11-12 23:49:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 16514 transitions. [2021-11-12 23:49:04,844 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 16514 transitions. Word has length 176 [2021-11-12 23:49:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:04,845 INFO L470 AbstractCegarLoop]: Abstraction has 10182 states and 16514 transitions. [2021-11-12 23:49:04,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:49:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 16514 transitions. [2021-11-12 23:49:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 23:49:04,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:04,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:49:04,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:05,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:49:05,073 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:49:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1298898818, now seen corresponding path program 1 times [2021-11-12 23:49:05,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:05,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273114038] [2021-11-12 23:49:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:05,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:05,077 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:05,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:49:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:05,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:49:05,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:49:06,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:49:07,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:07,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273114038] [2021-11-12 23:49:07,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273114038] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:07,138 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:07,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:49:07,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028692943] [2021-11-12 23:49:07,139 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:07,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:49:07,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:07,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:49:07,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:49:07,140 INFO L87 Difference]: Start difference. First operand 10182 states and 16514 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:49:09,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:11,171 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 23:49:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:16,756 INFO L93 Difference]: Finished difference Result 33948 states and 56563 transitions. [2021-11-12 23:49:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:49:16,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 183 [2021-11-12 23:49:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:16,952 INFO L225 Difference]: With dead ends: 33948 [2021-11-12 23:49:16,952 INFO L226 Difference]: Without dead ends: 23835 [2021-11-12 23:49:17,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:49:17,084 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 4006 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 1170 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7404.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 3676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.45ms SdHoareTripleChecker+Time, 1170 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7988.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:17,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4119 Valid, 2500 Invalid, 3676 Unknown, 0 Unchecked, 21.45ms Time], IncrementalHoareTripleChecker [1170 Valid, 2504 Invalid, 2 Unknown, 0 Unchecked, 7988.98ms Time] [2021-11-12 23:49:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23835 states. [2021-11-12 23:49:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23835 to 21281. [2021-11-12 23:49:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21281 states, 15710 states have (on average 1.578294080203692) internal successors, (24795), 16502 states have internal predecessors, (24795), 4563 states have call successors, (4563), 869 states have call predecessors, (4563), 1007 states have return successors, (5537), 4326 states have call predecessors, (5537), 4559 states have call successors, (5537) [2021-11-12 23:49:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21281 states to 21281 states and 34895 transitions. [2021-11-12 23:49:19,073 INFO L78 Accepts]: Start accepts. Automaton has 21281 states and 34895 transitions. Word has length 183 [2021-11-12 23:49:19,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:19,074 INFO L470 AbstractCegarLoop]: Abstraction has 21281 states and 34895 transitions. [2021-11-12 23:49:19,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:49:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 21281 states and 34895 transitions. [2021-11-12 23:49:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:49:19,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:19,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:49:19,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:19,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:49:19,293 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:49:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1253306110, now seen corresponding path program 1 times [2021-11-12 23:49:19,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:19,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566574857] [2021-11-12 23:49:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:19,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:19,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:19,296 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:19,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:49:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:20,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:49:20,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:49:20,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:49:21,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:21,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566574857] [2021-11-12 23:49:21,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566574857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:21,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:21,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:49:21,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211647813] [2021-11-12 23:49:21,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:21,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:49:21,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:21,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:49:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:49:21,188 INFO L87 Difference]: Start difference. First operand 21281 states and 34895 transitions. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:49:23,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:25,225 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 23:49:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:33,857 INFO L93 Difference]: Finished difference Result 77005 states and 130016 transitions. [2021-11-12 23:49:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:49:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 184 [2021-11-12 23:49:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:34,394 INFO L225 Difference]: With dead ends: 77005 [2021-11-12 23:49:34,394 INFO L226 Difference]: Without dead ends: 55801 [2021-11-12 23:49:34,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:49:34,551 INFO L933 BasicCegarLoop]: 1612 mSDtfsCounter, 3967 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 1127 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7567.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 3684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.09ms SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8170.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:34,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4081 Valid, 2620 Invalid, 3684 Unknown, 0 Unchecked, 23.09ms Time], IncrementalHoareTripleChecker [1127 Valid, 2555 Invalid, 2 Unknown, 0 Unchecked, 8170.54ms Time] [2021-11-12 23:49:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55801 states. [2021-11-12 23:49:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55801 to 48405. [2021-11-12 23:49:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48405 states, 35176 states have (on average 1.571639754377985) internal successors, (55284), 37120 states have internal predecessors, (55284), 11090 states have call successors, (11090), 1658 states have call predecessors, (11090), 2138 states have return successors, (13990), 10693 states have call predecessors, (13990), 11086 states have call successors, (13990) [2021-11-12 23:49:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48405 states to 48405 states and 80364 transitions. [2021-11-12 23:49:40,032 INFO L78 Accepts]: Start accepts. Automaton has 48405 states and 80364 transitions. Word has length 184 [2021-11-12 23:49:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:40,037 INFO L470 AbstractCegarLoop]: Abstraction has 48405 states and 80364 transitions. [2021-11-12 23:49:40,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:49:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 48405 states and 80364 transitions. [2021-11-12 23:49:40,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 23:49:40,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:40,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:49:40,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-12 23:49:40,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:49:40,249 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:49:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1104694855, now seen corresponding path program 1 times [2021-11-12 23:49:40,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:40,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316977081] [2021-11-12 23:49:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:40,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:40,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:40,252 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:40,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666b45b0-11ef-4cb4-92f6-fb60788a3d19/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:49:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:49:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:49:41,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:49:42,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:42,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316977081] [2021-11-12 23:49:42,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316977081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:42,061 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:42,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:49:42,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486643384] [2021-11-12 23:49:42,061 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:42,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:49:42,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:42,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:49:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:49:42,063 INFO L87 Difference]: Start difference. First operand 48405 states and 80364 transitions. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:49:44,085 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:49:46,093 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 23:50:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:04,329 INFO L93 Difference]: Finished difference Result 188286 states and 322256 transitions. [2021-11-12 23:50:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:50:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 185 [2021-11-12 23:50:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:05,517 INFO L225 Difference]: With dead ends: 188286 [2021-11-12 23:50:05,517 INFO L226 Difference]: Without dead ends: 139968 [2021-11-12 23:50:06,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:50:06,123 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 3787 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2622 mSolverCounterSat, 1071 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7950.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3902 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 3695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.03ms SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 2622 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8770.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:06,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3902 Valid, 2789 Invalid, 3695 Unknown, 0 Unchecked, 25.03ms Time], IncrementalHoareTripleChecker [1071 Valid, 2622 Invalid, 2 Unknown, 0 Unchecked, 8770.25ms Time] [2021-11-12 23:50:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139968 states.