./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:24:47,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:24:47,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:24:48,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:24:48,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:24:48,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:24:48,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:24:48,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:24:48,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:24:48,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:24:48,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:24:48,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:24:48,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:24:48,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:24:48,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:24:48,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:24:48,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:24:48,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:24:48,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:24:48,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:24:48,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:24:48,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:24:48,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:24:48,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:24:48,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:24:48,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:24:48,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:24:48,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:24:48,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:24:48,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:24:48,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:24:48,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:24:48,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:24:48,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:24:48,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:24:48,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:24:48,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:24:48,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:24:48,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:24:48,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:24:48,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:24:48,113 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:24:48,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:24:48,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:24:48,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:24:48,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:24:48,156 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:24:48,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:24:48,157 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:24:48,157 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:24:48,157 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:24:48,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:24:48,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:24:48,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:24:48,168 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:24:48,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:24:48,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:24:48,168 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:24:48,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:24:48,170 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:24:48,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:24:48,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:24:48,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:24:48,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:24:48,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:24:48,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:24:48,172 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:24:48,172 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:24:48,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:24:48,173 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:24:48,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:24:48,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:24:48,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:24:48,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:24:48,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:24:48,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:24:48,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:24:48,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:24:48,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:24:48,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:24:48,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:24:48,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:24:48,178 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_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2021-11-19 13:24:48,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:24:48,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:24:48,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:24:48,598 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:24:48,599 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:24:48,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2021-11-19 13:24:48,689 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data/786ce6e30/bf4e726720be47df8e7e9feddebfdf54/FLAG85076ef41 [2021-11-19 13:24:49,512 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:24:49,513 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2021-11-19 13:24:49,558 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data/786ce6e30/bf4e726720be47df8e7e9feddebfdf54/FLAG85076ef41 [2021-11-19 13:24:49,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data/786ce6e30/bf4e726720be47df8e7e9feddebfdf54 [2021-11-19 13:24:49,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:24:49,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:24:49,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:24:49,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:24:49,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:24:49,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:24:49" (1/1) ... [2021-11-19 13:24:49,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a546b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:49, skipping insertion in model container [2021-11-19 13:24:49,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:24:49" (1/1) ... [2021-11-19 13:24:49,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:24:49,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:24:50,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2021-11-19 13:24:50,565 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:24:50,583 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:24:50,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c3df888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:50, skipping insertion in model container [2021-11-19 13:24:50,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:24:50,585 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:24:50,588 INFO L158 Benchmark]: Toolchain (without parser) took 962.45ms. Allocated memory was 79.7MB in the beginning and 100.7MB in the end (delta: 21.0MB). Free memory was 41.9MB in the beginning and 62.3MB in the end (delta: -20.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-19 13:24:50,590 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 79.7MB. Free memory was 52.0MB in the beginning and 52.0MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:24:50,592 INFO L158 Benchmark]: CACSL2BoogieTranslator took 956.76ms. Allocated memory was 79.7MB in the beginning and 100.7MB in the end (delta: 21.0MB). Free memory was 41.7MB in the beginning and 62.3MB in the end (delta: -20.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-19 13:24:50,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 79.7MB. Free memory was 52.0MB in the beginning and 52.0MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 956.76ms. Allocated memory was 79.7MB in the beginning and 100.7MB in the end (delta: 21.0MB). Free memory was 41.7MB in the beginning and 62.3MB in the end (delta: -20.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: 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_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:24:53,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:24:53,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:24:53,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:24:53,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:24:53,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:24:53,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:24:53,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:24:53,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:24:53,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:24:53,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:24:53,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:24:53,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:24:53,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:24:53,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:24:53,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:24:53,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:24:53,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:24:53,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:24:53,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:24:53,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:24:53,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:24:53,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:24:53,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:24:53,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:24:53,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:24:53,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:24:53,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:24:53,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:24:53,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:24:53,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:24:53,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:24:53,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:24:53,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:24:53,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:24:53,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:24:53,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:24:53,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:24:53,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:24:53,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:24:53,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:24:53,526 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:24:53,576 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:24:53,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:24:53,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:24:53,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:24:53,578 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:24:53,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:24:53,579 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:24:53,579 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:24:53,580 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:24:53,580 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:24:53,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:24:53,581 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:24:53,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:24:53,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:24:53,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:24:53,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:24:53,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:24:53,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:24:53,583 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:24:53,584 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:24:53,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:24:53,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:24:53,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:24:53,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:24:53,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:24:53,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:24:53,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:24:53,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:24:53,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:24:53,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:24:53,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:24:53,587 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:24:53,588 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:53,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:24:53,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:24:53,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:24:53,589 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_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2021-11-19 13:24:54,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:24:54,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:24:54,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:24:54,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:24:54,168 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:24:54,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2021-11-19 13:24:54,273 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data/d0936ebe5/e37e40e5c6604c019332372f55c3196a/FLAG6dee97eca [2021-11-19 13:24:55,184 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:24:55,185 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2021-11-19 13:24:55,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data/d0936ebe5/e37e40e5c6604c019332372f55c3196a/FLAG6dee97eca [2021-11-19 13:24:55,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/data/d0936ebe5/e37e40e5c6604c019332372f55c3196a [2021-11-19 13:24:55,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:24:55,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:24:55,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:24:55,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:24:55,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:24:55,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:24:55" (1/1) ... [2021-11-19 13:24:55,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4159b827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:55, skipping insertion in model container [2021-11-19 13:24:55,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:24:55" (1/1) ... [2021-11-19 13:24:55,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:24:55,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:24:55,804 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2021-11-19 13:24:56,415 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:24:56,434 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:24:56,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:24:56,492 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2021-11-19 13:24:56,641 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:24:56,659 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:24:56,687 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2021-11-19 13:24:56,847 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:24:56,916 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:24:56,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56 WrapperNode [2021-11-19 13:24:56,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:24:56,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:24:56,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:24:56,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:24:56,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,127 INFO L137 Inliner]: procedures = 94, calls = 344, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 787 [2021-11-19 13:24:57,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:24:57,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:24:57,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:24:57,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:24:57,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:24:57,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:24:57,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:24:57,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:24:57,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (1/1) ... [2021-11-19 13:24:57,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:24:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:24:57,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:24:57,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:24:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 13:24:57,450 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 13:24:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:24:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 13:24:57,451 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 13:24:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 13:24:57,451 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 13:24:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-19 13:24:57,452 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-19 13:24:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:24:57,452 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:24:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:24:57,453 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:24:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 13:24:57,453 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 13:24:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:24:57,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:24:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:24:57,454 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:24:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:24:57,455 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:24:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:24:57,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:24:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:24:57,456 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:24:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:24:57,456 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:24:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:24:57,457 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:24:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:24:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:24:57,457 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:24:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:24:57,458 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:24:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:24:57,458 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:24:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:24:57,459 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:24:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:24:57,459 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:24:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 13:24:57,460 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 13:24:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:24:57,460 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:24:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:24:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:24:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:24:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:24:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-19 13:24:57,462 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-19 13:24:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:24:57,462 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 13:24:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:24:57,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:24:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:24:57,463 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:24:57,680 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:24:57,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:24:59,744 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:24:59,775 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:24:59,775 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 13:24:59,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:24:59 BoogieIcfgContainer [2021-11-19 13:24:59,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:24:59,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:24:59,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:24:59,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:24:59,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:24:55" (1/3) ... [2021-11-19 13:24:59,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7a10ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:24:59, skipping insertion in model container [2021-11-19 13:24:59,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:24:56" (2/3) ... [2021-11-19 13:24:59,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7a10ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:24:59, skipping insertion in model container [2021-11-19 13:24:59,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:24:59" (3/3) ... [2021-11-19 13:24:59,791 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2021-11-19 13:24:59,799 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:24:59,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:24:59,875 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:24:59,885 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:24:59,885 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:24:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 600 states, 470 states have (on average 1.6893617021276597) internal successors, (794), 490 states have internal predecessors, (794), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 13:24:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 13:24:59,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:59,995 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] [2021-11-19 13:24:59,996 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash 498297979, now seen corresponding path program 1 times [2021-11-19 13:25:00,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:00,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576748748] [2021-11-19 13:25:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:00,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:00,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:00,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:25:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:25:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:25:01,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:25:01,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:01,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576748748] [2021-11-19 13:25:01,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576748748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:01,362 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:01,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:25:01,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717477094] [2021-11-19 13:25:01,366 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:01,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:25:01,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:25:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:25:01,438 INFO L87 Difference]: Start difference. First operand has 600 states, 470 states have (on average 1.6893617021276597) internal successors, (794), 490 states have internal predecessors, (794), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 13:25:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:01,627 INFO L93 Difference]: Finished difference Result 1178 states and 1979 transitions. [2021-11-19 13:25:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:25:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-19 13:25:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:01,673 INFO L225 Difference]: With dead ends: 1178 [2021-11-19 13:25:01,674 INFO L226 Difference]: Without dead ends: 590 [2021-11-19 13:25:01,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:25:01,695 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:01,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:25:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-19 13:25:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-11-19 13:25:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 463 states have (on average 1.6717062634989202) internal successors, (774), 481 states have internal predecessors, (774), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 13:25:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 975 transitions. [2021-11-19 13:25:01,844 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 975 transitions. Word has length 99 [2021-11-19 13:25:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:01,847 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 975 transitions. [2021-11-19 13:25:01,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 13:25:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 975 transitions. [2021-11-19 13:25:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 13:25:01,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:01,869 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] [2021-11-19 13:25:01,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:25:02,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:02,072 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:02,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1305262619, now seen corresponding path program 1 times [2021-11-19 13:25:02,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:02,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099197565] [2021-11-19 13:25:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:02,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:02,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:02,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:25:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:02,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:25:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 13:25:03,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:25:03,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:03,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099197565] [2021-11-19 13:25:03,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099197565] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:03,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:03,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:25:03,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569110474] [2021-11-19 13:25:03,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:03,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:25:03,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:03,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:25:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:25:03,386 INFO L87 Difference]: Start difference. First operand 590 states and 975 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 13:25:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:03,603 INFO L93 Difference]: Finished difference Result 1176 states and 1950 transitions. [2021-11-19 13:25:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:25:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-19 13:25:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:03,614 INFO L225 Difference]: With dead ends: 1176 [2021-11-19 13:25:03,614 INFO L226 Difference]: Without dead ends: 594 [2021-11-19 13:25:03,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:25:03,622 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 15 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:03,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2871 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:25:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-19 13:25:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-11-19 13:25:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 466 states have (on average 1.667381974248927) internal successors, (777), 484 states have internal predecessors, (777), 102 states have call successors, (102), 27 states have call predecessors, (102), 25 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 13:25:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 978 transitions. [2021-11-19 13:25:03,706 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 978 transitions. Word has length 99 [2021-11-19 13:25:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:03,707 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 978 transitions. [2021-11-19 13:25:03,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 13:25:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 978 transitions. [2021-11-19 13:25:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 13:25:03,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:03,717 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, 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] [2021-11-19 13:25:03,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:03,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:03,919 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1064925813, now seen corresponding path program 1 times [2021-11-19 13:25:03,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:03,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989198305] [2021-11-19 13:25:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:03,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:03,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:03,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:03,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:25:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:04,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:25:04,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:25:05,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:05,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989198305] [2021-11-19 13:25:05,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989198305] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:05,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:05,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:25:05,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930632232] [2021-11-19 13:25:05,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:05,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:25:05,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:25:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:25:05,314 INFO L87 Difference]: Start difference. First operand 594 states and 978 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 13:25:05,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:05,735 INFO L93 Difference]: Finished difference Result 1200 states and 1981 transitions. [2021-11-19 13:25:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:25:05,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-19 13:25:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:05,752 INFO L225 Difference]: With dead ends: 1200 [2021-11-19 13:25:05,752 INFO L226 Difference]: Without dead ends: 616 [2021-11-19 13:25:05,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:25:05,763 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 119 mSDsluCounter, 4742 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5712 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:05,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5712 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:25:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-19 13:25:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 607. [2021-11-19 13:25:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 476 states have (on average 1.6638655462184875) internal successors, (792), 496 states have internal predecessors, (792), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (105), 97 states have call predecessors, (105), 100 states have call successors, (105) [2021-11-19 13:25:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1000 transitions. [2021-11-19 13:25:05,847 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1000 transitions. Word has length 101 [2021-11-19 13:25:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:05,849 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1000 transitions. [2021-11-19 13:25:05,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 13:25:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1000 transitions. [2021-11-19 13:25:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 13:25:05,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:05,866 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:25:05,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:06,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:06,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash -506135645, now seen corresponding path program 1 times [2021-11-19 13:25:06,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:06,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479178260] [2021-11-19 13:25:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:06,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:06,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:06,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:25:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:06,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:25:06,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:07,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:07,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479178260] [2021-11-19 13:25:07,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479178260] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:07,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:07,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:25:07,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165575079] [2021-11-19 13:25:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:07,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:25:07,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:25:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:25:07,413 INFO L87 Difference]: Start difference. First operand 607 states and 1000 transitions. Second operand has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:07,912 INFO L93 Difference]: Finished difference Result 1220 states and 2014 transitions. [2021-11-19 13:25:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:25:07,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2021-11-19 13:25:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:07,925 INFO L225 Difference]: With dead ends: 1220 [2021-11-19 13:25:07,925 INFO L226 Difference]: Without dead ends: 625 [2021-11-19 13:25:07,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:25:07,943 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 105 mSDsluCounter, 4773 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5754 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:07,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5754 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:25:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-19 13:25:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 607. [2021-11-19 13:25:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 476 states have (on average 1.6638655462184875) internal successors, (792), 496 states have internal predecessors, (792), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (105), 97 states have call predecessors, (105), 100 states have call successors, (105) [2021-11-19 13:25:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1000 transitions. [2021-11-19 13:25:08,011 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1000 transitions. Word has length 86 [2021-11-19 13:25:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:08,012 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1000 transitions. [2021-11-19 13:25:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1000 transitions. [2021-11-19 13:25:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 13:25:08,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:08,019 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:25:08,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:08,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:08,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:08,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:08,234 INFO L85 PathProgramCache]: Analyzing trace with hash 824329637, now seen corresponding path program 1 times [2021-11-19 13:25:08,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:08,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506591481] [2021-11-19 13:25:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:08,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:08,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:08,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:25:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:25:08,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:25:08,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 13:25:09,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:09,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506591481] [2021-11-19 13:25:09,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506591481] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:09,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:09,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 13:25:09,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039219929] [2021-11-19 13:25:09,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:09,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:25:09,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:09,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:25:09,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:25:09,224 INFO L87 Difference]: Start difference. First operand 607 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:25:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:09,353 INFO L93 Difference]: Finished difference Result 1205 states and 1989 transitions. [2021-11-19 13:25:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:25:09,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-19 13:25:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:09,363 INFO L225 Difference]: With dead ends: 1205 [2021-11-19 13:25:09,363 INFO L226 Difference]: Without dead ends: 608 [2021-11-19 13:25:09,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:25:09,370 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 22 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:09,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2871 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:25:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-19 13:25:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2021-11-19 13:25:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 478 states have (on average 1.6631799163179917) internal successors, (795), 497 states have internal predecessors, (795), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (101), 96 states have call predecessors, (101), 99 states have call successors, (101) [2021-11-19 13:25:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 998 transitions. [2021-11-19 13:25:09,418 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 998 transitions. Word has length 86 [2021-11-19 13:25:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:09,418 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 998 transitions. [2021-11-19 13:25:09,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:25:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 998 transitions. [2021-11-19 13:25:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 13:25:09,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:09,424 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:25:09,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:09,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:09,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1592290023, now seen corresponding path program 1 times [2021-11-19 13:25:09,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:09,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331979115] [2021-11-19 13:25:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:09,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:09,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:09,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:09,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:25:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:10,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:25:10,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:10,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:10,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331979115] [2021-11-19 13:25:10,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331979115] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:10,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:10,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:25:10,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038056246] [2021-11-19 13:25:10,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:10,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:25:10,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:25:10,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:25:10,809 INFO L87 Difference]: Start difference. First operand 608 states and 998 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:11,213 INFO L93 Difference]: Finished difference Result 1210 states and 1994 transitions. [2021-11-19 13:25:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:25:11,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-19 13:25:11,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:11,227 INFO L225 Difference]: With dead ends: 1210 [2021-11-19 13:25:11,235 INFO L226 Difference]: Without dead ends: 617 [2021-11-19 13:25:11,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:25:11,246 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 104 mSDsluCounter, 4730 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5703 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:11,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5703 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:25:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-19 13:25:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 608. [2021-11-19 13:25:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 478 states have (on average 1.6631799163179917) internal successors, (795), 497 states have internal predecessors, (795), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (101), 96 states have call predecessors, (101), 99 states have call successors, (101) [2021-11-19 13:25:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 998 transitions. [2021-11-19 13:25:11,288 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 998 transitions. Word has length 88 [2021-11-19 13:25:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:11,289 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 998 transitions. [2021-11-19 13:25:11,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 998 transitions. [2021-11-19 13:25:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 13:25:11,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:11,295 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] [2021-11-19 13:25:11,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:11,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:11,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash 944309273, now seen corresponding path program 1 times [2021-11-19 13:25:11,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:11,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419560158] [2021-11-19 13:25:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:11,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:11,521 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:11,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:25:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:11,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:25:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:25:12,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:25:12,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:12,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419560158] [2021-11-19 13:25:12,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419560158] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:12,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:12,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:25:12,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424233443] [2021-11-19 13:25:12,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:12,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:25:12,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:25:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:25:12,633 INFO L87 Difference]: Start difference. First operand 608 states and 998 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 13:25:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:12,946 INFO L93 Difference]: Finished difference Result 1230 states and 2032 transitions. [2021-11-19 13:25:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:25:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 105 [2021-11-19 13:25:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:12,957 INFO L225 Difference]: With dead ends: 1230 [2021-11-19 13:25:12,957 INFO L226 Difference]: Without dead ends: 637 [2021-11-19 13:25:12,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:25:12,964 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 112 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:12,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2715 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:25:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-19 13:25:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 628. [2021-11-19 13:25:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 497 states have (on average 1.6579476861167002) internal successors, (824), 516 states have internal predecessors, (824), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 13:25:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1026 transitions. [2021-11-19 13:25:13,005 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1026 transitions. Word has length 105 [2021-11-19 13:25:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:13,006 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1026 transitions. [2021-11-19 13:25:13,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 13:25:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1026 transitions. [2021-11-19 13:25:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 13:25:13,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:13,011 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:25:13,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:13,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:13,225 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash -506366901, now seen corresponding path program 1 times [2021-11-19 13:25:13,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:13,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327253451] [2021-11-19 13:25:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:13,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:13,229 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:13,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:25:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:25:13,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:14,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:14,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327253451] [2021-11-19 13:25:14,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327253451] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:14,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:14,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 13:25:14,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972284308] [2021-11-19 13:25:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:14,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:25:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:25:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:25:14,229 INFO L87 Difference]: Start difference. First operand 628 states and 1026 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:14,530 INFO L93 Difference]: Finished difference Result 1259 states and 2063 transitions. [2021-11-19 13:25:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:25:14,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 90 [2021-11-19 13:25:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:14,540 INFO L225 Difference]: With dead ends: 1259 [2021-11-19 13:25:14,541 INFO L226 Difference]: Without dead ends: 646 [2021-11-19 13:25:14,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:25:14,547 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 154 mSDsluCounter, 4658 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5619 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:14,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5619 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:25:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-19 13:25:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 628. [2021-11-19 13:25:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 497 states have (on average 1.6579476861167002) internal successors, (824), 516 states have internal predecessors, (824), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 13:25:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1026 transitions. [2021-11-19 13:25:14,589 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1026 transitions. Word has length 90 [2021-11-19 13:25:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:14,590 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1026 transitions. [2021-11-19 13:25:14,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1026 transitions. [2021-11-19 13:25:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 13:25:14,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:14,595 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] [2021-11-19 13:25:14,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:14,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:14,819 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1957328933, now seen corresponding path program 1 times [2021-11-19 13:25:14,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:14,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528247277] [2021-11-19 13:25:14,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:14,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:14,827 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:14,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:25:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:25:15,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:25:15,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:25:16,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:16,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528247277] [2021-11-19 13:25:16,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528247277] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:16,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:16,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:25:16,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889346088] [2021-11-19 13:25:16,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:16,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:25:16,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:25:16,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:25:16,112 INFO L87 Difference]: Start difference. First operand 628 states and 1026 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 13:25:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:16,564 INFO L93 Difference]: Finished difference Result 1254 states and 2054 transitions. [2021-11-19 13:25:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:25:16,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2021-11-19 13:25:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:16,578 INFO L225 Difference]: With dead ends: 1254 [2021-11-19 13:25:16,578 INFO L226 Difference]: Without dead ends: 641 [2021-11-19 13:25:16,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:25:16,587 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 112 mSDsluCounter, 5599 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6550 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:16,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6550 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:25:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-11-19 13:25:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 632. [2021-11-19 13:25:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 501 states have (on average 1.652694610778443) internal successors, (828), 520 states have internal predecessors, (828), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 13:25:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1030 transitions. [2021-11-19 13:25:16,631 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1030 transitions. Word has length 107 [2021-11-19 13:25:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:16,632 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1030 transitions. [2021-11-19 13:25:16,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 13:25:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1030 transitions. [2021-11-19 13:25:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 13:25:16,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:16,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:16,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:16,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:16,862 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1995368171, now seen corresponding path program 1 times [2021-11-19 13:25:16,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:16,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945525957] [2021-11-19 13:25:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:16,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:16,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:16,866 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:16,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:25:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:17,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:25:17,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:25:17,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:18,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:18,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945525957] [2021-11-19 13:25:18,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945525957] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:18,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:18,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:25:18,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142763823] [2021-11-19 13:25:18,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:18,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:25:18,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:25:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:25:18,021 INFO L87 Difference]: Start difference. First operand 632 states and 1030 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:18,525 INFO L93 Difference]: Finished difference Result 1264 states and 2066 transitions. [2021-11-19 13:25:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:25:18,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 92 [2021-11-19 13:25:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:18,536 INFO L225 Difference]: With dead ends: 1264 [2021-11-19 13:25:18,536 INFO L226 Difference]: Without dead ends: 647 [2021-11-19 13:25:18,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:25:18,543 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 108 mSDsluCounter, 5605 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:18,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6558 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:25:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-19 13:25:18,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 638. [2021-11-19 13:25:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 507 states have (on average 1.6449704142011834) internal successors, (834), 526 states have internal predecessors, (834), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 13:25:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1036 transitions. [2021-11-19 13:25:18,599 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1036 transitions. Word has length 92 [2021-11-19 13:25:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:18,599 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1036 transitions. [2021-11-19 13:25:18,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1036 transitions. [2021-11-19 13:25:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 13:25:18,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:18,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:18,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:18,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:18,817 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1293896321, now seen corresponding path program 1 times [2021-11-19 13:25:18,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:18,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9602419] [2021-11-19 13:25:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:18,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:18,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:18,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:18,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:25:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:19,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:25:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:25:19,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:19,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:19,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9602419] [2021-11-19 13:25:19,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9602419] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:25:19,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:25:19,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:25:19,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427248790] [2021-11-19 13:25:19,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:19,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:25:19,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:25:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:25:19,969 INFO L87 Difference]: Start difference. First operand 638 states and 1036 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:20,488 INFO L93 Difference]: Finished difference Result 1278 states and 2082 transitions. [2021-11-19 13:25:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:25:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-19 13:25:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:20,498 INFO L225 Difference]: With dead ends: 1278 [2021-11-19 13:25:20,499 INFO L226 Difference]: Without dead ends: 655 [2021-11-19 13:25:20,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:25:20,506 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 108 mSDsluCounter, 5605 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:20,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6558 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:25:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-19 13:25:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 646. [2021-11-19 13:25:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 515 states have (on average 1.6349514563106795) internal successors, (842), 534 states have internal predecessors, (842), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 96 states have call predecessors, (100), 99 states have call successors, (100) [2021-11-19 13:25:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1044 transitions. [2021-11-19 13:25:20,546 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1044 transitions. Word has length 93 [2021-11-19 13:25:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:20,546 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1044 transitions. [2021-11-19 13:25:20,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 13:25:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1044 transitions. [2021-11-19 13:25:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-19 13:25:20,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:20,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:20,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:20,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:20,774 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash 55486278, now seen corresponding path program 1 times [2021-11-19 13:25:20,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:20,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394696033] [2021-11-19 13:25:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:20,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:20,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:20,778 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:20,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:25:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:21,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:21,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:21,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:21,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394696033] [2021-11-19 13:25:21,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394696033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:21,869 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:21,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:25:21,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879844375] [2021-11-19 13:25:21,870 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:21,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:25:21,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:21,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:25:21,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:25:21,872 INFO L87 Difference]: Start difference. First operand 646 states and 1044 transitions. Second operand has 11 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:25:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:22,238 INFO L93 Difference]: Finished difference Result 1217 states and 1966 transitions. [2021-11-19 13:25:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:25:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 94 [2021-11-19 13:25:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:22,249 INFO L225 Difference]: With dead ends: 1217 [2021-11-19 13:25:22,249 INFO L226 Difference]: Without dead ends: 664 [2021-11-19 13:25:22,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:25:22,257 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 187 mSDsluCounter, 4781 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 5742 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:22,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 5742 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:25:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-19 13:25:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 653. [2021-11-19 13:25:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 519 states have (on average 1.630057803468208) internal successors, (846), 540 states have internal predecessors, (846), 103 states have call successors, (103), 29 states have call predecessors, (103), 30 states have return successors, (104), 97 states have call predecessors, (104), 100 states have call successors, (104) [2021-11-19 13:25:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1053 transitions. [2021-11-19 13:25:22,299 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1053 transitions. Word has length 94 [2021-11-19 13:25:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:22,300 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1053 transitions. [2021-11-19 13:25:22,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 13:25:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1053 transitions. [2021-11-19 13:25:22,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 13:25:22,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:22,305 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] [2021-11-19 13:25:22,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:22,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:22,527 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1133005433, now seen corresponding path program 1 times [2021-11-19 13:25:22,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:22,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063915007] [2021-11-19 13:25:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:22,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:22,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:22,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:22,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:25:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:23,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:25:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:25:23,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:23,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063915007] [2021-11-19 13:25:23,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063915007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:23,824 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:23,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:25:23,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660839492] [2021-11-19 13:25:23,825 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:23,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:25:23,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:25:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:25:23,828 INFO L87 Difference]: Start difference. First operand 653 states and 1053 transitions. Second operand has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 13:25:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:24,257 INFO L93 Difference]: Finished difference Result 1220 states and 1969 transitions. [2021-11-19 13:25:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:25:24,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 112 [2021-11-19 13:25:24,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:24,268 INFO L225 Difference]: With dead ends: 1220 [2021-11-19 13:25:24,268 INFO L226 Difference]: Without dead ends: 667 [2021-11-19 13:25:24,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:25:24,274 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 180 mSDsluCounter, 5751 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 6714 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:24,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 6714 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:25:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-19 13:25:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 660. [2021-11-19 13:25:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 523 states have (on average 1.6252390057361377) internal successors, (850), 546 states have internal predecessors, (850), 104 states have call successors, (104), 29 states have call predecessors, (104), 32 states have return successors, (108), 98 states have call predecessors, (108), 101 states have call successors, (108) [2021-11-19 13:25:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1062 transitions. [2021-11-19 13:25:24,314 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1062 transitions. Word has length 112 [2021-11-19 13:25:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:24,315 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1062 transitions. [2021-11-19 13:25:24,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 4 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 13:25:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1062 transitions. [2021-11-19 13:25:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 13:25:24,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:24,323 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:25:24,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:24,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:24,549 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1864272884, now seen corresponding path program 1 times [2021-11-19 13:25:24,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:24,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259991040] [2021-11-19 13:25:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:24,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:24,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:24,553 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:24,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:25:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:24,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:25,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:25:25,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:25,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259991040] [2021-11-19 13:25:25,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259991040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:25,607 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:25,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:25:25,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685348761] [2021-11-19 13:25:25,607 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:25,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:25:25,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:25,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:25:25,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:25:25,609 INFO L87 Difference]: Start difference. First operand 660 states and 1062 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:25:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:25,915 INFO L93 Difference]: Finished difference Result 1221 states and 1970 transitions. [2021-11-19 13:25:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:25:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 96 [2021-11-19 13:25:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:25,925 INFO L225 Difference]: With dead ends: 1221 [2021-11-19 13:25:25,925 INFO L226 Difference]: Without dead ends: 668 [2021-11-19 13:25:25,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:25:25,930 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 230 mSDsluCounter, 3789 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 4754 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:25,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 4754 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:25:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-19 13:25:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 663. [2021-11-19 13:25:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 525 states have (on average 1.6228571428571428) internal successors, (852), 549 states have internal predecessors, (852), 104 states have call successors, (104), 29 states have call predecessors, (104), 33 states have return successors, (109), 98 states have call predecessors, (109), 101 states have call successors, (109) [2021-11-19 13:25:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1065 transitions. [2021-11-19 13:25:25,978 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1065 transitions. Word has length 96 [2021-11-19 13:25:25,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:25,979 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1065 transitions. [2021-11-19 13:25:25,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 13:25:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1065 transitions. [2021-11-19 13:25:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 13:25:25,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:25,984 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] [2021-11-19 13:25:26,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:26,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:26,201 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1546820927, now seen corresponding path program 1 times [2021-11-19 13:25:26,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:26,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521404106] [2021-11-19 13:25:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:26,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:26,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:26,205 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:25:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:25:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:25:27,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:25:27,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:27,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521404106] [2021-11-19 13:25:27,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521404106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:27,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:27,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:25:27,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437539880] [2021-11-19 13:25:27,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:27,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:25:27,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:25:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:25:27,380 INFO L87 Difference]: Start difference. First operand 663 states and 1065 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:25:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:27,483 INFO L93 Difference]: Finished difference Result 1291 states and 2078 transitions. [2021-11-19 13:25:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:25:27,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2021-11-19 13:25:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:27,491 INFO L225 Difference]: With dead ends: 1291 [2021-11-19 13:25:27,491 INFO L226 Difference]: Without dead ends: 613 [2021-11-19 13:25:27,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:25:27,496 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 23 mSDsluCounter, 2866 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3825 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:27,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 3825 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:25:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-19 13:25:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2021-11-19 13:25:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 482 states have (on average 1.6058091286307055) internal successors, (774), 501 states have internal predecessors, (774), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 13:25:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 975 transitions. [2021-11-19 13:25:27,530 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 975 transitions. Word has length 112 [2021-11-19 13:25:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:27,530 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 975 transitions. [2021-11-19 13:25:27,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:25:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 975 transitions. [2021-11-19 13:25:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 13:25:27,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:27,535 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, 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] [2021-11-19 13:25:27,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:27,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:27,749 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2103482554, now seen corresponding path program 1 times [2021-11-19 13:25:27,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:27,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206273683] [2021-11-19 13:25:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:27,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:27,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:27,752 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:27,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:25:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:28,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:25:28,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 13:25:28,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:25:28,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:28,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206273683] [2021-11-19 13:25:28,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206273683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:28,791 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:28,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:25:28,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353126394] [2021-11-19 13:25:28,792 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:28,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:25:28,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:25:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:25:28,794 INFO L87 Difference]: Start difference. First operand 613 states and 975 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:25:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:29,016 INFO L93 Difference]: Finished difference Result 1252 states and 1983 transitions. [2021-11-19 13:25:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:25:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 114 [2021-11-19 13:25:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:29,026 INFO L225 Difference]: With dead ends: 1252 [2021-11-19 13:25:29,026 INFO L226 Difference]: Without dead ends: 610 [2021-11-19 13:25:29,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:25:29,032 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 134 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:29,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 3577 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:25:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-19 13:25:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-19 13:25:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 479 states have (on average 1.5845511482254697) internal successors, (759), 497 states have internal predecessors, (759), 102 states have call successors, (102), 30 states have call predecessors, (102), 28 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 13:25:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 960 transitions. [2021-11-19 13:25:29,070 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 960 transitions. Word has length 114 [2021-11-19 13:25:29,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:29,070 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 960 transitions. [2021-11-19 13:25:29,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 13:25:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 960 transitions. [2021-11-19 13:25:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 13:25:29,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:29,076 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:25:29,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:29,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:29,301 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2013646998, now seen corresponding path program 1 times [2021-11-19 13:25:29,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:29,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802089331] [2021-11-19 13:25:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:29,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:29,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:29,305 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:29,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:25:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:25:29,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:25:30,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:25:30,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:30,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802089331] [2021-11-19 13:25:30,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802089331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:30,644 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:30,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 13:25:30,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284755237] [2021-11-19 13:25:30,645 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:30,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:25:30,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:25:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:25:30,647 INFO L87 Difference]: Start difference. First operand 610 states and 960 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 13:25:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:32,332 INFO L93 Difference]: Finished difference Result 2247 states and 3655 transitions. [2021-11-19 13:25:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:25:32,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2021-11-19 13:25:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:32,357 INFO L225 Difference]: With dead ends: 2247 [2021-11-19 13:25:32,357 INFO L226 Difference]: Without dead ends: 1698 [2021-11-19 13:25:32,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:25:32,364 INFO L933 BasicCegarLoop]: 1098 mSDtfsCounter, 1735 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 3516 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:32,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 3516 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 13:25:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-11-19 13:25:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1568. [2021-11-19 13:25:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1253 states have (on average 1.6241021548284118) internal successors, (2035), 1288 states have internal predecessors, (2035), 248 states have call successors, (248), 70 states have call predecessors, (248), 66 states have return successors, (259), 225 states have call predecessors, (259), 243 states have call successors, (259) [2021-11-19 13:25:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2542 transitions. [2021-11-19 13:25:32,509 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2542 transitions. Word has length 99 [2021-11-19 13:25:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:32,510 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 2542 transitions. [2021-11-19 13:25:32,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 13:25:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2542 transitions. [2021-11-19 13:25:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 13:25:32,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:32,521 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:25:32,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:32,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:32,738 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:32,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1473971039, now seen corresponding path program 1 times [2021-11-19 13:25:32,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:32,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912237973] [2021-11-19 13:25:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:32,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:32,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:32,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:32,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:25:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:33,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:25:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:25:34,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 13:25:34,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:34,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912237973] [2021-11-19 13:25:34,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912237973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:34,746 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:34,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:25:34,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106124268] [2021-11-19 13:25:34,747 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:34,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:25:34,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:25:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:25:34,749 INFO L87 Difference]: Start difference. First operand 1568 states and 2542 transitions. Second operand has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 7 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2021-11-19 13:25:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:47,581 INFO L93 Difference]: Finished difference Result 5407 states and 8847 transitions. [2021-11-19 13:25:47,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:25:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 7 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 189 [2021-11-19 13:25:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:47,624 INFO L225 Difference]: With dead ends: 5407 [2021-11-19 13:25:47,625 INFO L226 Difference]: Without dead ends: 3900 [2021-11-19 13:25:47,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:25:47,642 INFO L933 BasicCegarLoop]: 1949 mSDtfsCounter, 3025 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 8309 mSolverCounterSat, 1031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3108 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 9340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1031 IncrementalHoareTripleChecker+Valid, 8309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:47,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3108 Valid, 4239 Invalid, 9340 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1031 Valid, 8309 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2021-11-19 13:25:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-11-19 13:25:47,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 3721. [2021-11-19 13:25:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 2876 states have (on average 1.5660639777468706) internal successors, (4504), 2954 states have internal predecessors, (4504), 700 states have call successors, (700), 137 states have call predecessors, (700), 144 states have return successors, (814), 663 states have call predecessors, (814), 691 states have call successors, (814) [2021-11-19 13:25:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 6018 transitions. [2021-11-19 13:25:47,976 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 6018 transitions. Word has length 189 [2021-11-19 13:25:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:47,977 INFO L470 AbstractCegarLoop]: Abstraction has 3721 states and 6018 transitions. [2021-11-19 13:25:47,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 7 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2021-11-19 13:25:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 6018 transitions. [2021-11-19 13:25:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:25:47,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:47,997 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:25:48,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:48,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:48,221 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash -882332478, now seen corresponding path program 1 times [2021-11-19 13:25:48,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:48,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540530196] [2021-11-19 13:25:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:48,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:48,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:48,224 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:48,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:25:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:25:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:25:50,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:25:54,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:54,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540530196] [2021-11-19 13:25:54,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540530196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:54,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:54,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 13:25:54,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750675858] [2021-11-19 13:25:54,340 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:54,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:25:54,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:54,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:25:54,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:25:54,343 INFO L87 Difference]: Start difference. First operand 3721 states and 6018 transitions. Second operand has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:26:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:26,250 INFO L93 Difference]: Finished difference Result 8864 states and 14653 transitions. [2021-11-19 13:26:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:26:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 137 [2021-11-19 13:26:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:26,318 INFO L225 Difference]: With dead ends: 8864 [2021-11-19 13:26:26,318 INFO L226 Difference]: Without dead ends: 5204 [2021-11-19 13:26:26,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:26:26,353 INFO L933 BasicCegarLoop]: 1119 mSDtfsCounter, 3904 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 5904 mSolverCounterSat, 1029 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4000 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 6933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1029 IncrementalHoareTripleChecker+Valid, 5904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:26,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4000 Valid, 2731 Invalid, 6933 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1029 Valid, 5904 Invalid, 0 Unknown, 0 Unchecked, 31.0s Time] [2021-11-19 13:26:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2021-11-19 13:26:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4282. [2021-11-19 13:26:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 3192 states have (on average 1.5595238095238095) internal successors, (4978), 3324 states have internal predecessors, (4978), 937 states have call successors, (937), 138 states have call predecessors, (937), 152 states have return successors, (1080), 885 states have call predecessors, (1080), 928 states have call successors, (1080) [2021-11-19 13:26:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 6995 transitions. [2021-11-19 13:26:26,870 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 6995 transitions. Word has length 137 [2021-11-19 13:26:26,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:26,871 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 6995 transitions. [2021-11-19 13:26:26,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 9 states have internal predecessors, (170), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-19 13:26:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 6995 transitions. [2021-11-19 13:26:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 13:26:26,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:26,880 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:26:26,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:27,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:27,105 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:27,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1093435191, now seen corresponding path program 1 times [2021-11-19 13:26:27,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:27,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062247677] [2021-11-19 13:26:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:27,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:27,110 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:27,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:26:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:27,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:26:27,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:26:28,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:26:29,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:29,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062247677] [2021-11-19 13:26:29,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062247677] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:26:29,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:26:29,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2021-11-19 13:26:29,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557755653] [2021-11-19 13:26:29,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:29,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:26:29,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:26:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:26:29,125 INFO L87 Difference]: Start difference. First operand 4282 states and 6995 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 13:26:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:36,659 INFO L93 Difference]: Finished difference Result 17349 states and 29929 transitions. [2021-11-19 13:26:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:26:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 138 [2021-11-19 13:26:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:36,807 INFO L225 Difference]: With dead ends: 17349 [2021-11-19 13:26:36,807 INFO L226 Difference]: Without dead ends: 12621 [2021-11-19 13:26:36,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:26:36,855 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 2679 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 796 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2857 SdHoareTripleChecker+Valid, 3246 SdHoareTripleChecker+Invalid, 3714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:36,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2857 Valid, 3246 Invalid, 3714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-19 13:26:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2021-11-19 13:26:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 9417. [2021-11-19 13:26:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9417 states, 6769 states have (on average 1.5622691682671) internal successors, (10575), 7131 states have internal predecessors, (10575), 2325 states have call successors, (2325), 249 states have call predecessors, (2325), 322 states have return successors, (3106), 2216 states have call predecessors, (3106), 2309 states have call successors, (3106) [2021-11-19 13:26:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9417 states to 9417 states and 16006 transitions. [2021-11-19 13:26:38,250 INFO L78 Accepts]: Start accepts. Automaton has 9417 states and 16006 transitions. Word has length 138 [2021-11-19 13:26:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:38,251 INFO L470 AbstractCegarLoop]: Abstraction has 9417 states and 16006 transitions. [2021-11-19 13:26:38,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 7 states have internal predecessors, (90), 5 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 13:26:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9417 states and 16006 transitions. [2021-11-19 13:26:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:26:38,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:38,260 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:26:38,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-19 13:26:38,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:38,485 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1574607829, now seen corresponding path program 1 times [2021-11-19 13:26:38,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:38,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840503829] [2021-11-19 13:26:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:38,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:38,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:38,488 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:38,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:26:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:26:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:26:39,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:26:40,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:40,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840503829] [2021-11-19 13:26:40,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840503829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:40,000 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:40,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 13:26:40,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369624773] [2021-11-19 13:26:40,001 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:40,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:26:40,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:26:40,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:26:40,003 INFO L87 Difference]: Start difference. First operand 9417 states and 16006 transitions. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 13:26:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:51,013 INFO L93 Difference]: Finished difference Result 31603 states and 56102 transitions. [2021-11-19 13:26:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:26:51,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) Word has length 139 [2021-11-19 13:26:51,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:51,241 INFO L225 Difference]: With dead ends: 31603 [2021-11-19 13:26:51,242 INFO L226 Difference]: Without dead ends: 22247 [2021-11-19 13:26:51,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:26:51,433 INFO L933 BasicCegarLoop]: 1640 mSDtfsCounter, 4273 mSDsluCounter, 2289 mSDsCounter, 0 mSdLazyCounter, 5262 mSolverCounterSat, 1275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4378 SdHoareTripleChecker+Valid, 3929 SdHoareTripleChecker+Invalid, 6537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1275 IncrementalHoareTripleChecker+Valid, 5262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:51,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4378 Valid, 3929 Invalid, 6537 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1275 Valid, 5262 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-19 13:26:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22247 states. [2021-11-19 13:26:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22247 to 20161. [2021-11-19 13:26:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20161 states, 14491 states have (on average 1.559519701883928) internal successors, (22599), 15294 states have internal predecessors, (22599), 4918 states have call successors, (4918), 602 states have call predecessors, (4918), 751 states have return successors, (6753), 4640 states have call predecessors, (6753), 4896 states have call successors, (6753) [2021-11-19 13:26:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20161 states to 20161 states and 34270 transitions. [2021-11-19 13:26:54,227 INFO L78 Accepts]: Start accepts. Automaton has 20161 states and 34270 transitions. Word has length 139 [2021-11-19 13:26:54,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:54,228 INFO L470 AbstractCegarLoop]: Abstraction has 20161 states and 34270 transitions. [2021-11-19 13:26:54,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (24), 4 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 13:26:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 20161 states and 34270 transitions. [2021-11-19 13:26:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:26:54,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:54,236 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:26:54,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:54,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:54,450 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1005673769, now seen corresponding path program 1 times [2021-11-19 13:26:54,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:54,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810789647] [2021-11-19 13:26:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:54,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:54,454 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:54,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:26:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:26:55,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:26:55,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:26:56,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:56,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810789647] [2021-11-19 13:26:56,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810789647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:56,492 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:56,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 13:26:56,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414446694] [2021-11-19 13:26:56,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:56,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:26:56,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:56,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:26:56,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:26:56,495 INFO L87 Difference]: Start difference. First operand 20161 states and 34270 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 13:27:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:27:15,759 INFO L93 Difference]: Finished difference Result 70217 states and 129972 transitions. [2021-11-19 13:27:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 13:27:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) Word has length 145 [2021-11-19 13:27:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:27:16,644 INFO L225 Difference]: With dead ends: 70217 [2021-11-19 13:27:16,644 INFO L226 Difference]: Without dead ends: 50069 [2021-11-19 13:27:17,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:27:17,096 INFO L933 BasicCegarLoop]: 1884 mSDtfsCounter, 5539 mSDsluCounter, 2925 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 2162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5653 SdHoareTripleChecker+Valid, 4809 SdHoareTripleChecker+Invalid, 11666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2162 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:27:17,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5653 Valid, 4809 Invalid, 11666 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2162 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2021-11-19 13:27:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50069 states. [2021-11-19 13:27:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50069 to 35116. [2021-11-19 13:27:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35116 states, 24643 states have (on average 1.5342287870794953) internal successors, (37808), 26180 states have internal predecessors, (37808), 9093 states have call successors, (9093), 934 states have call predecessors, (9093), 1379 states have return successors, (13405), 8855 states have call predecessors, (13405), 9059 states have call successors, (13405) [2021-11-19 13:27:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35116 states to 35116 states and 60306 transitions. [2021-11-19 13:27:22,335 INFO L78 Accepts]: Start accepts. Automaton has 35116 states and 60306 transitions. Word has length 145 [2021-11-19 13:27:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:27:22,336 INFO L470 AbstractCegarLoop]: Abstraction has 35116 states and 60306 transitions. [2021-11-19 13:27:22,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 12 states have internal predecessors, (162), 8 states have call successors, (32), 6 states have call predecessors, (32), 8 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 13:27:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 35116 states and 60306 transitions. [2021-11-19 13:27:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 13:27:22,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:27:22,344 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:27:22,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:27:22,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:27:22,557 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:27:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:27:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1460810976, now seen corresponding path program 1 times [2021-11-19 13:27:22,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:27:22,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383087072] [2021-11-19 13:27:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:22,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:27:22,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:27:22,562 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:27:22,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:27:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:23,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:27:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:27:23,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:27:24,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:24,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383087072] [2021-11-19 13:27:24,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383087072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:27:24,233 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:27:24,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:27:24,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671496874] [2021-11-19 13:27:24,234 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:24,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:27:24,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:24,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:27:24,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:27:24,235 INFO L87 Difference]: Start difference. First operand 35116 states and 60306 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 13:27:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:27:39,623 INFO L93 Difference]: Finished difference Result 123222 states and 237907 transitions. [2021-11-19 13:27:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:27:39,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 146 [2021-11-19 13:27:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:27:40,864 INFO L225 Difference]: With dead ends: 123222 [2021-11-19 13:27:40,865 INFO L226 Difference]: Without dead ends: 88167 [2021-11-19 13:27:41,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:27:41,630 INFO L933 BasicCegarLoop]: 1746 mSDtfsCounter, 4490 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 1297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4604 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 4092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1297 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:27:41,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4604 Valid, 2659 Invalid, 4092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1297 Valid, 2795 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-19 13:27:41,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88167 states. [2021-11-19 13:27:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88167 to 71340. [2021-11-19 13:27:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71340 states, 48753 states have (on average 1.5138350460484482) internal successors, (73804), 52108 states have internal predecessors, (73804), 19727 states have call successors, (19727), 1608 states have call predecessors, (19727), 2859 states have return successors, (30913), 19695 states have call predecessors, (30913), 19669 states have call successors, (30913) [2021-11-19 13:27:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71340 states to 71340 states and 124444 transitions. [2021-11-19 13:27:50,610 INFO L78 Accepts]: Start accepts. Automaton has 71340 states and 124444 transitions. Word has length 146 [2021-11-19 13:27:50,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:27:50,611 INFO L470 AbstractCegarLoop]: Abstraction has 71340 states and 124444 transitions. [2021-11-19 13:27:50,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2021-11-19 13:27:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 71340 states and 124444 transitions. [2021-11-19 13:27:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 13:27:50,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:27:50,619 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 13:27:50,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:27:50,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:27:50,842 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:27:50,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:27:50,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1263367898, now seen corresponding path program 1 times [2021-11-19 13:27:50,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:27:50,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569611096] [2021-11-19 13:27:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:50,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:27:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:27:50,846 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:27:50,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5a3511-a283-4fd7-ab93-087d4f3a9513/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:27:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:27:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:27:51,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:27:52,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:52,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569611096] [2021-11-19 13:27:52,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569611096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:27:52,618 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:27:52,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:27:52,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214803772] [2021-11-19 13:27:52,618 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:52,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:27:52,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:27:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:27:52,620 INFO L87 Difference]: Start difference. First operand 71340 states and 124444 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 8 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30)