./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/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 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:38:15,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:38:15,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:38:15,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:38:15,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:38:15,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:38:15,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:38:15,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:38:15,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:38:15,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:38:15,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:38:15,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:38:15,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:38:15,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:38:15,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:38:15,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:38:15,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:38:15,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:38:15,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:38:15,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:38:15,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:38:15,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:38:15,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:38:15,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:38:15,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:38:15,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:38:15,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:38:15,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:38:15,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:38:15,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:38:15,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:38:15,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:38:15,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:38:15,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:38:15,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:38:15,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:38:15,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:38:15,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:38:15,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:38:15,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:38:15,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:38:15,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:38:15,226 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:38:15,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:38:15,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:38:15,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:38:15,228 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:38:15,229 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:38:15,229 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:38:15,229 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:38:15,236 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:38:15,236 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:38:15,237 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:38:15,238 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:38:15,238 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:38:15,238 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:38:15,238 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:38:15,239 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:38:15,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:38:15,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:38:15,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:38:15,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:38:15,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:38:15,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:38:15,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:38:15,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:38:15,242 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:38:15,242 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:38:15,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:38:15,242 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:38:15,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:38:15,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:38:15,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:38:15,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:38:15,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:38:15,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:38:15,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:38:15,246 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:38:15,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:38:15,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:38:15,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:38:15,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:38:15,247 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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 [2021-11-19 13:38:15,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:38:15,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:38:15,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:38:15,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:38:15,584 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:38:15,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2021-11-19 13:38:15,653 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data/dfd0c4c8f/e89184aed52244fcaba1895c90347b2d/FLAGdada92946 [2021-11-19 13:38:16,271 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:38:16,271 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2021-11-19 13:38:16,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data/dfd0c4c8f/e89184aed52244fcaba1895c90347b2d/FLAGdada92946 [2021-11-19 13:38:16,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data/dfd0c4c8f/e89184aed52244fcaba1895c90347b2d [2021-11-19 13:38:16,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:38:16,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:38:16,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:38:16,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:38:16,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:38:16,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:38:16" (1/1) ... [2021-11-19 13:38:16,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bdb557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:16, skipping insertion in model container [2021-11-19 13:38:16,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:38:16" (1/1) ... [2021-11-19 13:38:16,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:38:16,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:38:16,898 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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2021-11-19 13:38:17,246 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:38:17,259 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 13:38:17,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7af15bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:17, skipping insertion in model container [2021-11-19 13:38:17,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:38:17,260 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:38:17,262 INFO L158 Benchmark]: Toolchain (without parser) took 781.96ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 49.3MB in the beginning and 74.5MB in the end (delta: -25.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-19 13:38:17,263 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory is still 69.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:38:17,264 INFO L158 Benchmark]: CACSL2BoogieTranslator took 773.46ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 49.0MB in the beginning and 74.5MB in the end (delta: -25.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-19 13:38:17,265 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory is still 69.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 773.46ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 49.0MB in the beginning and 74.5MB in the end (delta: -25.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 441]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/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 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:38:19,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:38:19,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:38:19,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:38:19,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:38:19,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:38:19,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:38:19,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:38:19,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:38:19,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:38:19,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:38:19,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:38:19,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:38:19,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:38:19,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:38:19,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:38:19,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:38:19,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:38:19,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:38:19,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:38:19,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:38:19,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:38:19,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:38:19,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:38:19,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:38:19,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:38:19,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:38:19,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:38:19,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:38:19,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:38:19,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:38:19,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:38:19,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:38:19,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:38:19,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:38:19,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:38:19,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:38:19,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:38:19,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:38:19,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:38:19,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:38:19,758 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:38:19,807 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:38:19,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:38:19,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:38:19,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:38:19,810 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:38:19,810 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:38:19,810 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:38:19,810 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:38:19,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:38:19,811 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:38:19,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:38:19,814 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:38:19,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:38:19,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:38:19,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:38:19,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:38:19,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:38:19,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:38:19,815 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:38:19,815 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:38:19,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:38:19,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:38:19,816 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:38:19,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:38:19,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:38:19,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:38:19,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:38:19,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:38:19,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:38:19,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:38:19,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:38:19,817 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:38:19,818 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:38:19,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:38:19,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:38:19,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:38:19,819 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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 [2021-11-19 13:38:20,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:38:20,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:38:20,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:38:20,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:38:20,246 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:38:20,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2021-11-19 13:38:20,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data/ce6d640f9/d0868f8f39e54e5ba5fabb64367df22e/FLAG2aa16f958 [2021-11-19 13:38:21,083 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:38:21,085 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2021-11-19 13:38:21,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data/ce6d640f9/d0868f8f39e54e5ba5fabb64367df22e/FLAG2aa16f958 [2021-11-19 13:38:21,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/data/ce6d640f9/d0868f8f39e54e5ba5fabb64367df22e [2021-11-19 13:38:21,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:38:21,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:38:21,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:38:21,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:38:21,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:38:21,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:38:21" (1/1) ... [2021-11-19 13:38:21,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368fc9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:21, skipping insertion in model container [2021-11-19 13:38:21,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:38:21" (1/1) ... [2021-11-19 13:38:21,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:38:21,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:38:21,673 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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2021-11-19 13:38:22,037 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:38:22,052 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:38:22,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:38:22,126 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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2021-11-19 13:38:22,269 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:38:22,278 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:38:22,314 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_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2021-11-19 13:38:22,411 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:38:22,506 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:38:22,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22 WrapperNode [2021-11-19 13:38:22,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:38:22,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:38:22,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:38:22,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:38:22,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,651 INFO L137 Inliner]: procedures = 154, calls = 292, calls flagged for inlining = 67, calls inlined = 64, statements flattened = 1264 [2021-11-19 13:38:22,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:38:22,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:38:22,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:38:22,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:38:22,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:38:22,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:38:22,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:38:22,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:38:22,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (1/1) ... [2021-11-19 13:38:22,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:38:22,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:38:22,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:38:22,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:38:22,913 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-19 13:38:22,913 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-19 13:38:22,913 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-19 13:38:22,913 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-19 13:38:22,913 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-19 13:38:22,913 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-19 13:38:22,913 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-19 13:38:22,914 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-19 13:38:22,914 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-19 13:38:22,914 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-19 13:38:22,914 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-19 13:38:22,914 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-19 13:38:22,914 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-19 13:38:22,914 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-19 13:38:22,914 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-19 13:38:22,915 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-19 13:38:22,915 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-19 13:38:22,915 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-19 13:38:22,915 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-19 13:38:22,915 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-19 13:38:22,915 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-19 13:38:22,915 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-19 13:38:22,915 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-19 13:38:22,915 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-19 13:38:22,916 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-19 13:38:22,916 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-19 13:38:22,916 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-19 13:38:22,916 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-19 13:38:22,916 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-19 13:38:22,916 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-19 13:38:22,916 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-19 13:38:22,916 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-19 13:38:22,917 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-19 13:38:22,917 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-19 13:38:22,917 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-19 13:38:22,917 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-19 13:38:22,917 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-19 13:38:22,917 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-19 13:38:22,917 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-19 13:38:22,917 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-19 13:38:22,918 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-19 13:38:22,918 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-19 13:38:22,918 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-19 13:38:22,918 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-19 13:38:22,918 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-19 13:38:22,918 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-19 13:38:22,919 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-19 13:38:22,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:38:22,920 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-19 13:38:22,921 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-19 13:38:22,922 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-19 13:38:22,922 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-19 13:38:22,923 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-19 13:38:22,923 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-19 13:38:22,923 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-19 13:38:22,923 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-19 13:38:22,924 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-19 13:38:22,924 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-19 13:38:22,924 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-19 13:38:22,924 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-19 13:38:22,924 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-19 13:38:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-19 13:38:22,925 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:38:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:38:22,925 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-19 13:38:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-19 13:38:22,925 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-19 13:38:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-19 13:38:22,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:38:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-19 13:38:22,927 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-19 13:38:22,927 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-19 13:38:22,927 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-19 13:38:22,927 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-19 13:38:22,927 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-19 13:38:22,927 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-19 13:38:22,927 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-19 13:38:22,928 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-19 13:38:22,928 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-19 13:38:22,928 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-19 13:38:22,928 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-19 13:38:22,928 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-19 13:38:22,928 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-19 13:38:22,928 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-19 13:38:22,929 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-19 13:38:22,929 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-19 13:38:22,930 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-19 13:38:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-19 13:38:22,930 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-19 13:38:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-19 13:38:22,931 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-19 13:38:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:38:22,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:38:23,302 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:38:23,305 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:38:24,627 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:38:24,641 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:38:24,641 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:38:24,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:38:24 BoogieIcfgContainer [2021-11-19 13:38:24,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:38:24,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:38:24,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:38:24,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:38:24,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:38:21" (1/3) ... [2021-11-19 13:38:24,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b4e763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:38:24, skipping insertion in model container [2021-11-19 13:38:24,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:38:22" (2/3) ... [2021-11-19 13:38:24,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b4e763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:38:24, skipping insertion in model container [2021-11-19 13:38:24,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:38:24" (3/3) ... [2021-11-19 13:38:24,653 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_productSimulator.cil.c [2021-11-19 13:38:24,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:38:24,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:38:24,712 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:38:24,720 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 13:38:24,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:38:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 614 states, 453 states have (on average 1.5121412803532008) internal successors, (685), 475 states have internal predecessors, (685), 115 states have call successors, (115), 44 states have call predecessors, (115), 44 states have return successors, (115), 113 states have call predecessors, (115), 115 states have call successors, (115) [2021-11-19 13:38:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 13:38:24,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:24,803 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:24,804 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:24,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1093087284, now seen corresponding path program 1 times [2021-11-19 13:38:24,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:24,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688046755] [2021-11-19 13:38:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:24,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:24,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:24,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:24,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:38:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:25,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:38:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:38:25,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:38:26,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:26,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688046755] [2021-11-19 13:38:26,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688046755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:26,123 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:26,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:38:26,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023259174] [2021-11-19 13:38:26,126 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:26,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:38:26,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:38:26,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:38:26,168 INFO L87 Difference]: Start difference. First operand has 614 states, 453 states have (on average 1.5121412803532008) internal successors, (685), 475 states have internal predecessors, (685), 115 states have call successors, (115), 44 states have call predecessors, (115), 44 states have return successors, (115), 113 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 13:38:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:26,298 INFO L93 Difference]: Finished difference Result 958 states and 1411 transitions. [2021-11-19 13:38:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:38:26,307 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 152 [2021-11-19 13:38:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:26,338 INFO L225 Difference]: With dead ends: 958 [2021-11-19 13:38:26,341 INFO L226 Difference]: Without dead ends: 606 [2021-11-19 13:38:26,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:38:26,361 INFO L933 BasicCegarLoop]: 909 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, 909 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 13:38:26,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-19 13:38:26,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2021-11-19 13:38:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 447 states have (on average 1.5078299776286352) internal successors, (674), 467 states have internal predecessors, (674), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 13:38:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 901 transitions. [2021-11-19 13:38:26,481 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 901 transitions. Word has length 152 [2021-11-19 13:38:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:26,483 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 901 transitions. [2021-11-19 13:38:26,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-19 13:38:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 901 transitions. [2021-11-19 13:38:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 13:38:26,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:26,503 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:26,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:38:26,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:26,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1753524556, now seen corresponding path program 1 times [2021-11-19 13:38:26,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:26,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988714855] [2021-11-19 13:38:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:26,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:26,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:26,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:26,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:38:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:38:27,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:38:27,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:38:27,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:27,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988714855] [2021-11-19 13:38:27,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988714855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:27,910 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:27,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 13:38:27,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502903604] [2021-11-19 13:38:27,916 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:27,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:38:27,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:38:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:38:27,922 INFO L87 Difference]: Start difference. First operand 606 states and 901 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 13:38:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:28,063 INFO L93 Difference]: Finished difference Result 1176 states and 1746 transitions. [2021-11-19 13:38:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:38:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 153 [2021-11-19 13:38:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:28,074 INFO L225 Difference]: With dead ends: 1176 [2021-11-19 13:38:28,074 INFO L226 Difference]: Without dead ends: 606 [2021-11-19 13:38:28,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:38:28,079 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 3 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:28,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3585 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-19 13:38:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2021-11-19 13:38:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 447 states have (on average 1.4921700223713648) internal successors, (667), 467 states have internal predecessors, (667), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 13:38:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 894 transitions. [2021-11-19 13:38:28,154 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 894 transitions. Word has length 153 [2021-11-19 13:38:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:28,155 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 894 transitions. [2021-11-19 13:38:28,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 13:38:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 894 transitions. [2021-11-19 13:38:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 13:38:28,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:28,164 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:28,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:28,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:28,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash 669699045, now seen corresponding path program 1 times [2021-11-19 13:38:28,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:28,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750390987] [2021-11-19 13:38:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:28,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:28,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:28,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:38:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:28,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 13:38:29,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:38:29,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:29,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750390987] [2021-11-19 13:38:29,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750390987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:29,406 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:29,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:38:29,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549667587] [2021-11-19 13:38:29,406 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:38:29,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:38:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:38:29,417 INFO L87 Difference]: Start difference. First operand 606 states and 894 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-19 13:38:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:29,534 INFO L93 Difference]: Finished difference Result 1182 states and 1759 transitions. [2021-11-19 13:38:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:29,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) Word has length 158 [2021-11-19 13:38:29,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:29,542 INFO L225 Difference]: With dead ends: 1182 [2021-11-19 13:38:29,542 INFO L226 Difference]: Without dead ends: 607 [2021-11-19 13:38:29,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:38:29,549 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 855 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:29,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 919 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-19 13:38:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-19 13:38:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 449 states have (on average 1.4810690423162582) internal successors, (665), 467 states have internal predecessors, (665), 113 states have call successors, (113), 45 states have call predecessors, (113), 44 states have return successors, (110), 109 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-19 13:38:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 888 transitions. [2021-11-19 13:38:29,606 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 888 transitions. Word has length 158 [2021-11-19 13:38:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:29,607 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 888 transitions. [2021-11-19 13:38:29,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (37), 4 states have call predecessors, (37), 4 states have call successors, (37) [2021-11-19 13:38:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 888 transitions. [2021-11-19 13:38:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 13:38:29,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:29,613 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:29,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 13:38:29,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:29,829 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:29,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2023754000, now seen corresponding path program 1 times [2021-11-19 13:38:29,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:29,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351449569] [2021-11-19 13:38:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:29,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:29,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:29,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:29,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:38:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:30,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:30,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-19 13:38:30,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 13:38:31,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:31,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351449569] [2021-11-19 13:38:31,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351449569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:31,035 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:31,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:31,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766180350] [2021-11-19 13:38:31,035 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:31,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:31,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:31,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:31,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:31,038 INFO L87 Difference]: Start difference. First operand 607 states and 888 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-19 13:38:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:31,144 INFO L93 Difference]: Finished difference Result 1464 states and 2153 transitions. [2021-11-19 13:38:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 189 [2021-11-19 13:38:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:31,151 INFO L225 Difference]: With dead ends: 1464 [2021-11-19 13:38:31,151 INFO L226 Difference]: Without dead ends: 608 [2021-11-19 13:38:31,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:31,156 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 705 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:31,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 1861 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-19 13:38:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2021-11-19 13:38:31,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 451 states have (on average 1.4722838137472283) internal successors, (664), 467 states have internal predecessors, (664), 111 states have call successors, (111), 46 states have call predecessors, (111), 45 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-19 13:38:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 883 transitions. [2021-11-19 13:38:31,191 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 883 transitions. Word has length 189 [2021-11-19 13:38:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:31,192 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 883 transitions. [2021-11-19 13:38:31,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2021-11-19 13:38:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 883 transitions. [2021-11-19 13:38:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 13:38:31,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:31,197 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:31,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:31,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:31,414 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash -41686357, now seen corresponding path program 1 times [2021-11-19 13:38:31,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:31,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720128264] [2021-11-19 13:38:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:31,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:31,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:31,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:31,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:38:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:38:32,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 13:38:32,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:32,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720128264] [2021-11-19 13:38:32,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720128264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:32,397 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:32,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:32,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010707160] [2021-11-19 13:38:32,398 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:32,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:32,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:32,400 INFO L87 Difference]: Start difference. First operand 608 states and 883 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 13:38:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:32,524 INFO L93 Difference]: Finished difference Result 1170 states and 1706 transitions. [2021-11-19 13:38:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 169 [2021-11-19 13:38:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:32,531 INFO L225 Difference]: With dead ends: 1170 [2021-11-19 13:38:32,532 INFO L226 Difference]: Without dead ends: 611 [2021-11-19 13:38:32,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:32,535 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 818 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:32,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 897 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-19 13:38:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 605. [2021-11-19 13:38:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 451 states have (on average 1.4478935698447895) internal successors, (653), 462 states have internal predecessors, (653), 108 states have call successors, (108), 46 states have call predecessors, (108), 45 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-19 13:38:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 866 transitions. [2021-11-19 13:38:32,582 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 866 transitions. Word has length 169 [2021-11-19 13:38:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:32,583 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 866 transitions. [2021-11-19 13:38:32,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 13:38:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 866 transitions. [2021-11-19 13:38:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-19 13:38:32,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:32,590 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:32,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:32,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:32,807 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash -498477064, now seen corresponding path program 1 times [2021-11-19 13:38:32,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:32,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374461572] [2021-11-19 13:38:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:32,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:32,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:32,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:38:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:38:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 13:38:33,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 13:38:34,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:34,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374461572] [2021-11-19 13:38:34,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374461572] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:34,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:34,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-11-19 13:38:34,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354023481] [2021-11-19 13:38:34,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:34,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:38:34,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:38:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:38:34,129 INFO L87 Difference]: Start difference. First operand 605 states and 866 transitions. Second operand has 8 states, 6 states have (on average 18.666666666666668) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:38:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:34,380 INFO L93 Difference]: Finished difference Result 1154 states and 1667 transitions. [2021-11-19 13:38:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:38:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.666666666666668) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) Word has length 194 [2021-11-19 13:38:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:34,386 INFO L225 Difference]: With dead ends: 1154 [2021-11-19 13:38:34,387 INFO L226 Difference]: Without dead ends: 607 [2021-11-19 13:38:34,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:38:34,394 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 363 mSDsluCounter, 4697 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 5548 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:34,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 5548 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-19 13:38:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-19 13:38:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 452 states have (on average 1.4469026548672566) internal successors, (654), 464 states have internal predecessors, (654), 108 states have call successors, (108), 46 states have call predecessors, (108), 46 states have return successors, (107), 104 states have call predecessors, (107), 105 states have call successors, (107) [2021-11-19 13:38:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 869 transitions. [2021-11-19 13:38:34,441 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 869 transitions. Word has length 194 [2021-11-19 13:38:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:34,442 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 869 transitions. [2021-11-19 13:38:34,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.666666666666668) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:38:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 869 transitions. [2021-11-19 13:38:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 13:38:34,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:34,447 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:34,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:34,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:34,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:34,662 INFO L85 PathProgramCache]: Analyzing trace with hash -670358513, now seen corresponding path program 1 times [2021-11-19 13:38:34,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:34,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379984926] [2021-11-19 13:38:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:34,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:34,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:34,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:38:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:35,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:38:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 13:38:35,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 13:38:36,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:36,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379984926] [2021-11-19 13:38:36,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379984926] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:36,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:38:36,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 13:38:36,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104509971] [2021-11-19 13:38:36,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:36,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:38:36,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:38:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:38:36,035 INFO L87 Difference]: Start difference. First operand 607 states and 869 transitions. Second operand has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:38:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:36,241 INFO L93 Difference]: Finished difference Result 1155 states and 1670 transitions. [2021-11-19 13:38:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:38:36,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 195 [2021-11-19 13:38:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:36,247 INFO L225 Difference]: With dead ends: 1155 [2021-11-19 13:38:36,248 INFO L226 Difference]: Without dead ends: 609 [2021-11-19 13:38:36,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:38:36,251 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 361 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 3846 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:36,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 3846 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-19 13:38:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2021-11-19 13:38:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 453 states have (on average 1.445916114790287) internal successors, (655), 466 states have internal predecessors, (655), 108 states have call successors, (108), 46 states have call predecessors, (108), 47 states have return successors, (111), 104 states have call predecessors, (111), 105 states have call successors, (111) [2021-11-19 13:38:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 874 transitions. [2021-11-19 13:38:36,296 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 874 transitions. Word has length 195 [2021-11-19 13:38:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:36,297 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 874 transitions. [2021-11-19 13:38:36,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:38:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 874 transitions. [2021-11-19 13:38:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 13:38:36,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:36,302 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:36,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:36,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:36,520 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:36,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1234981107, now seen corresponding path program 1 times [2021-11-19 13:38:36,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:36,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986794080] [2021-11-19 13:38:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:36,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:36,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:36,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:36,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:38:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:38:36,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-19 13:38:37,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-19 13:38:37,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:37,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986794080] [2021-11-19 13:38:37,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986794080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:37,755 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:37,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:38:37,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079904330] [2021-11-19 13:38:37,756 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:37,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:38:37,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:38:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:38:37,758 INFO L87 Difference]: Start difference. First operand 609 states and 874 transitions. Second operand has 12 states, 8 states have (on average 17.25) internal successors, (138), 12 states have internal predecessors, (138), 6 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (36), 3 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-19 13:38:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:38,029 INFO L93 Difference]: Finished difference Result 1143 states and 1656 transitions. [2021-11-19 13:38:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:38:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 17.25) internal successors, (138), 12 states have internal predecessors, (138), 6 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (36), 3 states have call predecessors, (36), 6 states have call successors, (36) Word has length 189 [2021-11-19 13:38:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:38,035 INFO L225 Difference]: With dead ends: 1143 [2021-11-19 13:38:38,035 INFO L226 Difference]: Without dead ends: 609 [2021-11-19 13:38:38,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:38:38,039 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 357 mSDsluCounter, 6872 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 7723 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:38,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 7723 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-19 13:38:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2021-11-19 13:38:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 453 states have (on average 1.445916114790287) internal successors, (655), 466 states have internal predecessors, (655), 108 states have call successors, (108), 46 states have call predecessors, (108), 47 states have return successors, (110), 104 states have call predecessors, (110), 105 states have call successors, (110) [2021-11-19 13:38:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 873 transitions. [2021-11-19 13:38:38,080 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 873 transitions. Word has length 189 [2021-11-19 13:38:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:38,080 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 873 transitions. [2021-11-19 13:38:38,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 17.25) internal successors, (138), 12 states have internal predecessors, (138), 6 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (36), 3 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-19 13:38:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 873 transitions. [2021-11-19 13:38:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 13:38:38,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:38,085 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:38,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:38,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:38,301 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:38,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:38,302 INFO L85 PathProgramCache]: Analyzing trace with hash -847320510, now seen corresponding path program 2 times [2021-11-19 13:38:38,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:38,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621987559] [2021-11-19 13:38:38,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:38:38,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:38,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:38,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:38:38,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 13:38:38,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:38:38,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:38,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 13:38:38,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-19 13:38:39,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:39,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621987559] [2021-11-19 13:38:39,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621987559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:39,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:39,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:38:39,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274373545] [2021-11-19 13:38:39,229 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:39,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:38:39,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:38:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:38:39,231 INFO L87 Difference]: Start difference. First operand 609 states and 873 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:39,364 INFO L93 Difference]: Finished difference Result 1072 states and 1545 transitions. [2021-11-19 13:38:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:38:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 190 [2021-11-19 13:38:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:39,372 INFO L225 Difference]: With dead ends: 1072 [2021-11-19 13:38:39,372 INFO L226 Difference]: Without dead ends: 738 [2021-11-19 13:38:39,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:38:39,375 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 169 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:39,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1914 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-19 13:38:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 730. [2021-11-19 13:38:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 557 states have (on average 1.4721723518850987) internal successors, (820), 570 states have internal predecessors, (820), 125 states have call successors, (125), 46 states have call predecessors, (125), 47 states have return successors, (128), 121 states have call predecessors, (128), 122 states have call successors, (128) [2021-11-19 13:38:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1073 transitions. [2021-11-19 13:38:39,426 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1073 transitions. Word has length 190 [2021-11-19 13:38:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:39,426 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1073 transitions. [2021-11-19 13:38:39,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1073 transitions. [2021-11-19 13:38:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 13:38:39,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:39,432 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:39,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:39,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:39,646 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:39,646 INFO L85 PathProgramCache]: Analyzing trace with hash -666587029, now seen corresponding path program 1 times [2021-11-19 13:38:39,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:39,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416437829] [2021-11-19 13:38:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:39,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:39,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:39,649 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:39,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:38:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:38:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 13:38:40,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-19 13:38:40,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:40,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416437829] [2021-11-19 13:38:40,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416437829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:40,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:40,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:38:40,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456597631] [2021-11-19 13:38:40,992 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:40,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:38:40,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:38:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:38:40,993 INFO L87 Difference]: Start difference. First operand 730 states and 1073 transitions. Second operand has 12 states, 8 states have (on average 19.25) internal successors, (154), 12 states have internal predecessors, (154), 6 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (38), 3 states have call predecessors, (38), 6 states have call successors, (38) [2021-11-19 13:38:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:41,281 INFO L93 Difference]: Finished difference Result 1387 states and 2059 transitions. [2021-11-19 13:38:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:38:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 19.25) internal successors, (154), 12 states have internal predecessors, (154), 6 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (38), 3 states have call predecessors, (38), 6 states have call successors, (38) Word has length 209 [2021-11-19 13:38:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:41,288 INFO L225 Difference]: With dead ends: 1387 [2021-11-19 13:38:41,288 INFO L226 Difference]: Without dead ends: 732 [2021-11-19 13:38:41,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:38:41,292 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 528 mSDsluCounter, 7065 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 7917 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:41,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 7917 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:38:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-19 13:38:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2021-11-19 13:38:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 558 states have (on average 1.471326164874552) internal successors, (821), 572 states have internal predecessors, (821), 125 states have call successors, (125), 46 states have call predecessors, (125), 48 states have return successors, (130), 121 states have call predecessors, (130), 122 states have call successors, (130) [2021-11-19 13:38:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1076 transitions. [2021-11-19 13:38:41,376 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1076 transitions. Word has length 209 [2021-11-19 13:38:41,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:41,377 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1076 transitions. [2021-11-19 13:38:41,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 19.25) internal successors, (154), 12 states have internal predecessors, (154), 6 states have call successors, (45), 2 states have call predecessors, (45), 4 states have return successors, (38), 3 states have call predecessors, (38), 6 states have call successors, (38) [2021-11-19 13:38:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1076 transitions. [2021-11-19 13:38:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-19 13:38:41,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:41,385 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:41,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:41,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:41,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:41,606 INFO L85 PathProgramCache]: Analyzing trace with hash 110000035, now seen corresponding path program 1 times [2021-11-19 13:38:41,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:41,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176012331] [2021-11-19 13:38:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:41,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:41,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:41,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:41,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:38:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:41,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:38:42,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-19 13:38:42,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-19 13:38:42,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:42,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176012331] [2021-11-19 13:38:42,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176012331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:42,874 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:42,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 13:38:42,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415899792] [2021-11-19 13:38:42,875 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:42,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:38:42,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:38:42,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:38:42,877 INFO L87 Difference]: Start difference. First operand 732 states and 1076 transitions. Second operand has 9 states, 7 states have (on average 23.0) internal successors, (161), 9 states have internal predecessors, (161), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-19 13:38:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:43,105 INFO L93 Difference]: Finished difference Result 1384 states and 2053 transitions. [2021-11-19 13:38:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:38:43,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 23.0) internal successors, (161), 9 states have internal predecessors, (161), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 231 [2021-11-19 13:38:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:43,112 INFO L225 Difference]: With dead ends: 1384 [2021-11-19 13:38:43,112 INFO L226 Difference]: Without dead ends: 732 [2021-11-19 13:38:43,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:38:43,116 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 363 mSDsluCounter, 4321 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5171 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:43,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5171 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:38:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-19 13:38:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2021-11-19 13:38:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 558 states have (on average 1.471326164874552) internal successors, (821), 572 states have internal predecessors, (821), 125 states have call successors, (125), 46 states have call predecessors, (125), 48 states have return successors, (129), 121 states have call predecessors, (129), 122 states have call successors, (129) [2021-11-19 13:38:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1075 transitions. [2021-11-19 13:38:43,176 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1075 transitions. Word has length 231 [2021-11-19 13:38:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:43,177 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1075 transitions. [2021-11-19 13:38:43,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 23.0) internal successors, (161), 9 states have internal predecessors, (161), 4 states have call successors, (50), 2 states have call predecessors, (50), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-11-19 13:38:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1075 transitions. [2021-11-19 13:38:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-19 13:38:43,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:43,183 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:43,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:43,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:43,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash 765397223, now seen corresponding path program 1 times [2021-11-19 13:38:43,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:43,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538083927] [2021-11-19 13:38:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:43,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:43,403 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:43,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:38:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:38:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 13:38:44,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 13:38:44,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:44,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538083927] [2021-11-19 13:38:44,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538083927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:44,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:44,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-19 13:38:44,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359570048] [2021-11-19 13:38:44,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:44,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:38:44,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:38:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:38:44,460 INFO L87 Difference]: Start difference. First operand 732 states and 1075 transitions. Second operand has 9 states, 7 states have (on average 21.428571428571427) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-19 13:38:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:44,715 INFO L93 Difference]: Finished difference Result 1386 states and 2059 transitions. [2021-11-19 13:38:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:38:44,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 21.428571428571427) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) Word has length 204 [2021-11-19 13:38:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:44,722 INFO L225 Difference]: With dead ends: 1386 [2021-11-19 13:38:44,723 INFO L226 Difference]: Without dead ends: 734 [2021-11-19 13:38:44,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:38:44,727 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 533 mSDsluCounter, 3666 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 4517 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:44,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 4517 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:38:44,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-19 13:38:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2021-11-19 13:38:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 559 states have (on average 1.4704830053667264) internal successors, (822), 574 states have internal predecessors, (822), 125 states have call successors, (125), 46 states have call predecessors, (125), 49 states have return successors, (134), 121 states have call predecessors, (134), 122 states have call successors, (134) [2021-11-19 13:38:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1081 transitions. [2021-11-19 13:38:44,797 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1081 transitions. Word has length 204 [2021-11-19 13:38:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:44,800 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1081 transitions. [2021-11-19 13:38:44,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 21.428571428571427) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (35), 4 states have call predecessors, (35), 4 states have call successors, (35) [2021-11-19 13:38:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1081 transitions. [2021-11-19 13:38:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-19 13:38:44,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:44,805 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:44,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:45,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:45,025 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash -970351878, now seen corresponding path program 1 times [2021-11-19 13:38:45,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:45,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635413040] [2021-11-19 13:38:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:45,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:45,027 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:45,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:38:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:45,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:38:45,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:38:46,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:46,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635413040] [2021-11-19 13:38:46,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635413040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:46,062 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:46,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:46,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540622772] [2021-11-19 13:38:46,063 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:46,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:46,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:46,067 INFO L87 Difference]: Start difference. First operand 734 states and 1081 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:38:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:46,120 INFO L93 Difference]: Finished difference Result 1452 states and 2163 transitions. [2021-11-19 13:38:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:46,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 212 [2021-11-19 13:38:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:46,127 INFO L225 Difference]: With dead ends: 1452 [2021-11-19 13:38:46,128 INFO L226 Difference]: Without dead ends: 834 [2021-11-19 13:38:46,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:46,132 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 165 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:46,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 1706 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-19 13:38:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 826. [2021-11-19 13:38:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 637 states have (on average 1.4772370486656201) internal successors, (941), 652 states have internal predecessors, (941), 139 states have call successors, (139), 46 states have call predecessors, (139), 49 states have return successors, (150), 135 states have call predecessors, (150), 136 states have call successors, (150) [2021-11-19 13:38:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1230 transitions. [2021-11-19 13:38:46,186 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1230 transitions. Word has length 212 [2021-11-19 13:38:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:46,186 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1230 transitions. [2021-11-19 13:38:46,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:38:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1230 transitions. [2021-11-19 13:38:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-19 13:38:46,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:46,192 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:46,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:46,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:46,405 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash 463241009, now seen corresponding path program 1 times [2021-11-19 13:38:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:46,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119368495] [2021-11-19 13:38:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:46,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:46,408 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:46,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:38:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:46,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 13:38:47,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 13:38:47,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:47,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119368495] [2021-11-19 13:38:47,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119368495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:47,456 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:47,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:47,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676542089] [2021-11-19 13:38:47,457 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:47,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:47,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:47,458 INFO L87 Difference]: Start difference. First operand 826 states and 1230 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 13:38:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:47,530 INFO L93 Difference]: Finished difference Result 1728 states and 2618 transitions. [2021-11-19 13:38:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:47,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 227 [2021-11-19 13:38:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:47,539 INFO L225 Difference]: With dead ends: 1728 [2021-11-19 13:38:47,539 INFO L226 Difference]: Without dead ends: 1029 [2021-11-19 13:38:47,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:47,546 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 163 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:47,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1738 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-11-19 13:38:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1021. [2021-11-19 13:38:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 801 states have (on average 1.4931335830212236) internal successors, (1196), 816 states have internal predecessors, (1196), 170 states have call successors, (170), 46 states have call predecessors, (170), 49 states have return successors, (185), 166 states have call predecessors, (185), 167 states have call successors, (185) [2021-11-19 13:38:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1551 transitions. [2021-11-19 13:38:47,617 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1551 transitions. Word has length 227 [2021-11-19 13:38:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:47,617 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1551 transitions. [2021-11-19 13:38:47,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 13:38:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1551 transitions. [2021-11-19 13:38:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-19 13:38:47,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:47,626 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:47,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:47,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:47,847 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash -358297493, now seen corresponding path program 1 times [2021-11-19 13:38:47,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:47,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389754391] [2021-11-19 13:38:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:47,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:47,850 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:47,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:38:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:48,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:48,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:38:48,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:38:48,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:48,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389754391] [2021-11-19 13:38:48,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389754391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:48,933 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:48,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:48,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351383420] [2021-11-19 13:38:48,933 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:48,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:48,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:48,935 INFO L87 Difference]: Start difference. First operand 1021 states and 1551 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:49,026 INFO L93 Difference]: Finished difference Result 2299 states and 3558 transitions. [2021-11-19 13:38:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 207 [2021-11-19 13:38:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:49,038 INFO L225 Difference]: With dead ends: 2299 [2021-11-19 13:38:49,038 INFO L226 Difference]: Without dead ends: 1413 [2021-11-19 13:38:49,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:49,043 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 161 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:49,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1731 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-11-19 13:38:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1405. [2021-11-19 13:38:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1127 states have (on average 1.5164152617568767) internal successors, (1709), 1142 states have internal predecessors, (1709), 228 states have call successors, (228), 46 states have call predecessors, (228), 49 states have return successors, (243), 224 states have call predecessors, (243), 225 states have call successors, (243) [2021-11-19 13:38:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2180 transitions. [2021-11-19 13:38:49,164 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2180 transitions. Word has length 207 [2021-11-19 13:38:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:49,165 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2180 transitions. [2021-11-19 13:38:49,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2180 transitions. [2021-11-19 13:38:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-19 13:38:49,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:49,174 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:49,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:49,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:49,391 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:49,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash -760060097, now seen corresponding path program 1 times [2021-11-19 13:38:49,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:49,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897647956] [2021-11-19 13:38:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:49,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:49,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:49,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:49,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:38:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:49,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:38:50,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:38:50,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897647956] [2021-11-19 13:38:50,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897647956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:50,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:50,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:50,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474777064] [2021-11-19 13:38:50,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:50,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:50,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:50,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:50,485 INFO L87 Difference]: Start difference. First operand 1405 states and 2180 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:38:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:50,610 INFO L93 Difference]: Finished difference Result 3394 states and 5369 transitions. [2021-11-19 13:38:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:50,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 215 [2021-11-19 13:38:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:50,627 INFO L225 Difference]: With dead ends: 3394 [2021-11-19 13:38:50,627 INFO L226 Difference]: Without dead ends: 2135 [2021-11-19 13:38:50,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:50,634 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 159 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:50,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1726 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-11-19 13:38:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2127. [2021-11-19 13:38:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 1753 states have (on average 1.5413576725613234) internal successors, (2702), 1768 states have internal predecessors, (2702), 324 states have call successors, (324), 46 states have call predecessors, (324), 49 states have return successors, (347), 320 states have call predecessors, (347), 321 states have call successors, (347) [2021-11-19 13:38:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 3373 transitions. [2021-11-19 13:38:50,809 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 3373 transitions. Word has length 215 [2021-11-19 13:38:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:50,810 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 3373 transitions. [2021-11-19 13:38:50,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:38:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 3373 transitions. [2021-11-19 13:38:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 13:38:50,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:50,821 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:50,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:51,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:51,042 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2139031459, now seen corresponding path program 1 times [2021-11-19 13:38:51,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:51,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354780266] [2021-11-19 13:38:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:51,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:51,043 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:51,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:38:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:51,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:38:51,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:38:52,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:52,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354780266] [2021-11-19 13:38:52,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354780266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:52,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:52,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:52,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559857107] [2021-11-19 13:38:52,026 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:52,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:52,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:52,028 INFO L87 Difference]: Start difference. First operand 2127 states and 3373 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:52,247 INFO L93 Difference]: Finished difference Result 5483 states and 8836 transitions. [2021-11-19 13:38:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 209 [2021-11-19 13:38:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:52,275 INFO L225 Difference]: With dead ends: 5483 [2021-11-19 13:38:52,275 INFO L226 Difference]: Without dead ends: 3513 [2021-11-19 13:38:52,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:52,286 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 157 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:52,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1726 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-11-19 13:38:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3505. [2021-11-19 13:38:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 2963 states have (on average 1.56294296321296) internal successors, (4631), 2978 states have internal predecessors, (4631), 492 states have call successors, (492), 46 states have call predecessors, (492), 49 states have return successors, (531), 488 states have call predecessors, (531), 489 states have call successors, (531) [2021-11-19 13:38:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 5654 transitions. [2021-11-19 13:38:52,586 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 5654 transitions. Word has length 209 [2021-11-19 13:38:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:52,586 INFO L470 AbstractCegarLoop]: Abstraction has 3505 states and 5654 transitions. [2021-11-19 13:38:52,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 5654 transitions. [2021-11-19 13:38:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-19 13:38:52,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:52,602 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:52,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:52,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:52,817 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:52,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1887852652, now seen corresponding path program 1 times [2021-11-19 13:38:52,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:52,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414050940] [2021-11-19 13:38:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:52,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:52,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:52,818 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:52,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:38:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:38:53,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:38:53,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:53,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414050940] [2021-11-19 13:38:53,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414050940] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:53,933 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:53,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:53,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441799070] [2021-11-19 13:38:53,934 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:53,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:53,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:53,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:53,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:53,935 INFO L87 Difference]: Start difference. First operand 3505 states and 5654 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:38:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:54,325 INFO L93 Difference]: Finished difference Result 9476 states and 15438 transitions. [2021-11-19 13:38:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:54,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 217 [2021-11-19 13:38:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:54,370 INFO L225 Difference]: With dead ends: 9476 [2021-11-19 13:38:54,370 INFO L226 Difference]: Without dead ends: 6139 [2021-11-19 13:38:54,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:54,381 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 155 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:54,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1740 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6139 states. [2021-11-19 13:38:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6139 to 6131. [2021-11-19 13:38:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6131 states, 5205 states have (on average 1.5661863592699328) internal successors, (8152), 5220 states have internal predecessors, (8152), 876 states have call successors, (876), 46 states have call predecessors, (876), 49 states have return successors, (947), 872 states have call predecessors, (947), 873 states have call successors, (947) [2021-11-19 13:38:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6131 states to 6131 states and 9975 transitions. [2021-11-19 13:38:54,836 INFO L78 Accepts]: Start accepts. Automaton has 6131 states and 9975 transitions. Word has length 217 [2021-11-19 13:38:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:54,838 INFO L470 AbstractCegarLoop]: Abstraction has 6131 states and 9975 transitions. [2021-11-19 13:38:54,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:38:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6131 states and 9975 transitions. [2021-11-19 13:38:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-19 13:38:54,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:54,860 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:54,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:55,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:55,073 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:55,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1179852200, now seen corresponding path program 1 times [2021-11-19 13:38:55,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:55,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710639058] [2021-11-19 13:38:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:55,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:55,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:55,076 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:55,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:38:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:55,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:38:55,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:38:56,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:56,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710639058] [2021-11-19 13:38:56,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710639058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:56,006 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:56,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:38:56,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402187198] [2021-11-19 13:38:56,007 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:56,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:38:56,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:38:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:56,008 INFO L87 Difference]: Start difference. First operand 6131 states and 9975 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:56,677 INFO L93 Difference]: Finished difference Result 17280 states and 28358 transitions. [2021-11-19 13:38:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:56,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 211 [2021-11-19 13:38:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:56,740 INFO L225 Difference]: With dead ends: 17280 [2021-11-19 13:38:56,740 INFO L226 Difference]: Without dead ends: 11325 [2021-11-19 13:38:56,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:38:56,763 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 153 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:56,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1733 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2021-11-19 13:38:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11317. [2021-11-19 13:38:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 9687 states have (on average 1.5749974192216372) internal successors, (15257), 9702 states have internal predecessors, (15257), 1580 states have call successors, (1580), 46 states have call predecessors, (1580), 49 states have return successors, (1715), 1576 states have call predecessors, (1715), 1577 states have call successors, (1715) [2021-11-19 13:38:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 18552 transitions. [2021-11-19 13:38:57,640 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 18552 transitions. Word has length 211 [2021-11-19 13:38:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:38:57,641 INFO L470 AbstractCegarLoop]: Abstraction has 11317 states and 18552 transitions. [2021-11-19 13:38:57,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 18552 transitions. [2021-11-19 13:38:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-19 13:38:57,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:38:57,669 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:38:57,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:38:57,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:38:57,885 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:38:57,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:38:57,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1161280083, now seen corresponding path program 1 times [2021-11-19 13:38:57,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:38:57,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242331900] [2021-11-19 13:38:57,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:57,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:38:57,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:38:57,887 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:38:57,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:38:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:38:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:38:58,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:38:58,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:38:58,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242331900] [2021-11-19 13:38:58,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242331900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:38:58,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:38:58,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:38:58,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595745853] [2021-11-19 13:38:58,900 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:38:58,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:38:58,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:38:58,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:38:58,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:38:58,902 INFO L87 Difference]: Start difference. First operand 11317 states and 18552 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:38:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:38:59,650 INFO L93 Difference]: Finished difference Result 22424 states and 36802 transitions. [2021-11-19 13:38:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:38:59,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 211 [2021-11-19 13:38:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:38:59,701 INFO L225 Difference]: With dead ends: 22424 [2021-11-19 13:38:59,702 INFO L226 Difference]: Without dead ends: 11325 [2021-11-19 13:38:59,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:38:59,734 INFO L933 BasicCegarLoop]: 1037 mSDtfsCounter, 151 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:38:59,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 2783 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:38:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2021-11-19 13:39:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11317. [2021-11-19 13:39:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 9687 states have (on average 1.5683906266129866) internal successors, (15193), 9702 states have internal predecessors, (15193), 1580 states have call successors, (1580), 46 states have call predecessors, (1580), 49 states have return successors, (1715), 1576 states have call predecessors, (1715), 1577 states have call successors, (1715) [2021-11-19 13:39:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 18488 transitions. [2021-11-19 13:39:00,517 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 18488 transitions. Word has length 211 [2021-11-19 13:39:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:00,518 INFO L470 AbstractCegarLoop]: Abstraction has 11317 states and 18488 transitions. [2021-11-19 13:39:00,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:39:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 18488 transitions. [2021-11-19 13:39:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-19 13:39:00,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:00,547 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:00,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:00,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:00,765 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1594227532, now seen corresponding path program 1 times [2021-11-19 13:39:00,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:00,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276415967] [2021-11-19 13:39:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:00,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:00,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:00,767 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:00,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:39:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:01,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:01,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:39:01,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:39:02,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:02,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276415967] [2021-11-19 13:39:02,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276415967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:02,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:02,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:39:02,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109908251] [2021-11-19 13:39:02,027 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:39:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:39:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:02,029 INFO L87 Difference]: Start difference. First operand 11317 states and 18488 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:39:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:02,980 INFO L93 Difference]: Finished difference Result 30444 states and 49439 transitions. [2021-11-19 13:39:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 212 [2021-11-19 13:39:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:03,075 INFO L225 Difference]: With dead ends: 30444 [2021-11-19 13:39:03,075 INFO L226 Difference]: Without dead ends: 19327 [2021-11-19 13:39:03,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:03,100 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 151 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:03,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1720 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:39:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19327 states. [2021-11-19 13:39:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19327 to 19319. [2021-11-19 13:39:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19319 states, 16601 states have (on average 1.535931570387326) internal successors, (25498), 16616 states have internal predecessors, (25498), 2668 states have call successors, (2668), 46 states have call predecessors, (2668), 49 states have return successors, (2931), 2664 states have call predecessors, (2931), 2665 states have call successors, (2931) [2021-11-19 13:39:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19319 states to 19319 states and 31097 transitions. [2021-11-19 13:39:04,514 INFO L78 Accepts]: Start accepts. Automaton has 19319 states and 31097 transitions. Word has length 212 [2021-11-19 13:39:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:04,515 INFO L470 AbstractCegarLoop]: Abstraction has 19319 states and 31097 transitions. [2021-11-19 13:39:04,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:39:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 19319 states and 31097 transitions. [2021-11-19 13:39:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-19 13:39:04,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:04,552 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:04,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:04,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:04,769 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1967246448, now seen corresponding path program 1 times [2021-11-19 13:39:04,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:04,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481602528] [2021-11-19 13:39:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:04,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:04,772 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:04,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:39:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:05,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:39:05,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:39:05,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:05,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481602528] [2021-11-19 13:39:05,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481602528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:05,896 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:05,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:39:05,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795854131] [2021-11-19 13:39:05,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:05,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:39:05,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:39:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:05,897 INFO L87 Difference]: Start difference. First operand 19319 states and 31097 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:39:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:07,517 INFO L93 Difference]: Finished difference Result 56105 states and 90584 transitions. [2021-11-19 13:39:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:07,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 213 [2021-11-19 13:39:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:07,669 INFO L225 Difference]: With dead ends: 56105 [2021-11-19 13:39:07,670 INFO L226 Difference]: Without dead ends: 36993 [2021-11-19 13:39:07,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:07,714 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 149 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:07,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1732 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:39:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36993 states. [2021-11-19 13:39:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36993 to 36985. [2021-11-19 13:39:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36985 states, 31963 states have (on average 1.5346181522385258) internal successors, (49051), 31978 states have internal predecessors, (49051), 4972 states have call successors, (4972), 46 states have call predecessors, (4972), 49 states have return successors, (5491), 4968 states have call predecessors, (5491), 4969 states have call successors, (5491) [2021-11-19 13:39:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36985 states to 36985 states and 59514 transitions. [2021-11-19 13:39:10,598 INFO L78 Accepts]: Start accepts. Automaton has 36985 states and 59514 transitions. Word has length 213 [2021-11-19 13:39:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:10,598 INFO L470 AbstractCegarLoop]: Abstraction has 36985 states and 59514 transitions. [2021-11-19 13:39:10,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:39:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 36985 states and 59514 transitions. [2021-11-19 13:39:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-19 13:39:10,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:10,644 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:10,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:10,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:10,861 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 407570126, now seen corresponding path program 1 times [2021-11-19 13:39:10,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:10,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328670871] [2021-11-19 13:39:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:10,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:10,863 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:10,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:39:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:11,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:39:11,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 13:39:11,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:11,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328670871] [2021-11-19 13:39:11,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328670871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:11,902 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:11,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:39:11,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62239241] [2021-11-19 13:39:11,902 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:11,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:39:11,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:39:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:11,904 INFO L87 Difference]: Start difference. First operand 36985 states and 59514 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:39:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:15,588 INFO L93 Difference]: Finished difference Result 107557 states and 173776 transitions. [2021-11-19 13:39:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 221 [2021-11-19 13:39:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:15,836 INFO L225 Difference]: With dead ends: 107557 [2021-11-19 13:39:15,836 INFO L226 Difference]: Without dead ends: 70787 [2021-11-19 13:39:15,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:15,913 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 147 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:15,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1732 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:39:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70787 states. [2021-11-19 13:39:20,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70787 to 70779. [2021-11-19 13:39:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70779 states, 61405 states have (on average 1.5367478218386126) internal successors, (94364), 61420 states have internal predecessors, (94364), 9324 states have call successors, (9324), 46 states have call predecessors, (9324), 49 states have return successors, (10355), 9320 states have call predecessors, (10355), 9321 states have call successors, (10355) [2021-11-19 13:39:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70779 states to 70779 states and 114043 transitions. [2021-11-19 13:39:21,223 INFO L78 Accepts]: Start accepts. Automaton has 70779 states and 114043 transitions. Word has length 221 [2021-11-19 13:39:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:21,224 INFO L470 AbstractCegarLoop]: Abstraction has 70779 states and 114043 transitions. [2021-11-19 13:39:21,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 13:39:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 70779 states and 114043 transitions. [2021-11-19 13:39:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-19 13:39:21,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:21,267 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:21,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:21,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:21,481 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2128868202, now seen corresponding path program 1 times [2021-11-19 13:39:21,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:21,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464991459] [2021-11-19 13:39:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:21,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:21,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:21,483 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:21,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b33aa3bf-e7ac-4a64-8c00-2b3c952214e3/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:39:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:21,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:39:21,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:39:22,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-19 13:39:22,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:22,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464991459] [2021-11-19 13:39:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464991459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:22,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:22,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:39:22,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750845838] [2021-11-19 13:39:22,691 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:22,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:39:22,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:22,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:39:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:22,693 INFO L87 Difference]: Start difference. First operand 70779 states and 114043 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:39:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:29,447 INFO L93 Difference]: Finished difference Result 137165 states and 221516 transitions. [2021-11-19 13:39:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:39:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 215 [2021-11-19 13:39:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:30,022 INFO L225 Difference]: With dead ends: 137165 [2021-11-19 13:39:30,022 INFO L226 Difference]: Without dead ends: 136831 [2021-11-19 13:39:30,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:39:30,054 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 145 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:30,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1732 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:39:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136831 states.