./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.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_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/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_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/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_f9a74f20-5116-41ec-9f99-49f725a62b9f/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 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:49:58,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:49:58,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:49:58,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:49:58,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:49:58,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:49:58,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:49:58,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:49:58,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:49:58,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:49:58,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:49:58,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:49:58,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:49:58,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:49:58,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:49:58,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:49:58,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:49:58,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:49:58,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:49:58,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:49:58,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:49:58,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:49:58,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:49:58,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:49:58,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:49:58,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:49:58,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:49:58,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:49:58,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:49:58,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:49:58,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:49:58,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:49:58,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:49:58,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:49:58,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:49:58,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:49:58,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:49:58,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:49:58,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:49:58,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:49:58,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:49:58,283 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:49:58,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:49:58,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:49:58,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:49:58,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:49:58,332 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:49:58,333 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:49:58,333 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:49:58,333 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:49:58,340 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:49:58,340 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:49:58,341 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:49:58,342 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:49:58,342 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:49:58,342 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:49:58,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:49:58,343 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:49:58,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:49:58,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:49:58,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:49:58,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:49:58,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:49:58,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:49:58,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:49:58,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:49:58,346 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:49:58,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:49:58,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:49:58,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:49:58,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:49:58,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:49:58,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:49:58,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:49:58,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:49:58,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:49:58,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:49:58,350 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:49:58,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:49:58,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:49:58,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:49:58,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:49:58,351 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_f9a74f20-5116-41ec-9f99-49f725a62b9f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2021-11-19 15:49:58,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:49:58,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:49:58,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:49:58,665 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:49:58,666 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:49:58,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-19 15:49:58,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data/27b7ccaec/ed1115a94a4140d98f7aa4529e5774fc/FLAGb3d6b1e0a [2021-11-19 15:49:59,338 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:49:59,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-19 15:49:59,361 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data/27b7ccaec/ed1115a94a4140d98f7aa4529e5774fc/FLAGb3d6b1e0a [2021-11-19 15:49:59,573 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data/27b7ccaec/ed1115a94a4140d98f7aa4529e5774fc [2021-11-19 15:49:59,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:49:59,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:49:59,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:49:59,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:49:59,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:49:59,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:49:59" (1/1) ... [2021-11-19 15:49:59,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11cf8906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:49:59, skipping insertion in model container [2021-11-19 15:49:59,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:49:59" (1/1) ... [2021-11-19 15:49:59,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:49:59,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:00,011 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_f9a74f20-5116-41ec-9f99-49f725a62b9f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-19 15:50:00,223 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:00,236 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 15:50:00,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ed7c3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:00, skipping insertion in model container [2021-11-19 15:50:00,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:00,238 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:50:00,240 INFO L158 Benchmark]: Toolchain (without parser) took 661.47ms. Allocated memory is still 107.0MB. Free memory was 62.3MB in the beginning and 68.6MB in the end (delta: -6.3MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2021-11-19 15:50:00,240 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 107.0MB. Free memory is still 81.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:50:00,241 INFO L158 Benchmark]: CACSL2BoogieTranslator took 657.24ms. Allocated memory is still 107.0MB. Free memory was 62.1MB in the beginning and 68.6MB in the end (delta: -6.5MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2021-11-19 15:50:00,243 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 107.0MB. Free memory is still 81.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 657.24ms. Allocated memory is still 107.0MB. Free memory was 62.1MB in the beginning and 68.6MB in the end (delta: -6.5MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/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_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/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_f9a74f20-5116-41ec-9f99-49f725a62b9f/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 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:02,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:02,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:02,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:02,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:02,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:02,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:02,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:02,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:02,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:02,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:02,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:02,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:02,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:02,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:02,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:02,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:02,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:02,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:02,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:02,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:02,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:02,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:02,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:02,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:02,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:02,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:02,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:02,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:02,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:02,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:02,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:02,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:02,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:02,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:02,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:02,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:02,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:02,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:02,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:02,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:02,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:50:02,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:02,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:02,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:02,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:02,630 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:02,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:02,630 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:02,630 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:02,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:02,631 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:02,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:02,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:50:02,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:50:02,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:02,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:02,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:02,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:02,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:02,635 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:50:02,636 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:50:02,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:50:02,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:02,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:02,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:02,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:02,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:50:02,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:02,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:02,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:02,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:02,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:02,639 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:50:02,639 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:02,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:02,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:02,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:02,640 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_f9a74f20-5116-41ec-9f99-49f725a62b9f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2021-11-19 15:50:03,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:03,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:03,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:03,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:03,027 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:03,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-19 15:50:03,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data/9eeaa0591/cf63bf83fb394deca6799e0f650f9009/FLAGf5398c405 [2021-11-19 15:50:03,835 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:03,836 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-19 15:50:03,868 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data/9eeaa0591/cf63bf83fb394deca6799e0f650f9009/FLAGf5398c405 [2021-11-19 15:50:04,002 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/data/9eeaa0591/cf63bf83fb394deca6799e0f650f9009 [2021-11-19 15:50:04,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:04,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:04,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:04,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:04,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:04,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:04" (1/1) ... [2021-11-19 15:50:04,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57da94d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:04, skipping insertion in model container [2021-11-19 15:50:04,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:04" (1/1) ... [2021-11-19 15:50:04,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:04,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:04,510 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_f9a74f20-5116-41ec-9f99-49f725a62b9f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-19 15:50:04,755 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:04,776 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:50:04,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:04,881 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_f9a74f20-5116-41ec-9f99-49f725a62b9f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-19 15:50:04,989 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:05,012 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:50:05,065 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_f9a74f20-5116-41ec-9f99-49f725a62b9f/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-19 15:50:05,172 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:05,209 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:50:05,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05 WrapperNode [2021-11-19 15:50:05,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:05,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:05,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:50:05,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:50:05,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,340 INFO L137 Inliner]: procedures = 97, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1102 [2021-11-19 15:50:05,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:05,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:50:05,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:50:05,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:50:05,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:50:05,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:50:05,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:50:05,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:50:05,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (1/1) ... [2021-11-19 15:50:05,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:05,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:50:05,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:50:05,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:50:05,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:50:05,542 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 15:50:05,543 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 15:50:05,543 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 15:50:05,543 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 15:50:05,544 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 15:50:05,544 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 15:50:05,544 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 15:50:05,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 15:50:05,544 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 15:50:05,544 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 15:50:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 15:50:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 15:50:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 15:50:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 15:50:05,545 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 15:50:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 15:50:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 15:50:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 15:50:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 15:50:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 15:50:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 15:50:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 15:50:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 15:50:05,548 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 15:50:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 15:50:05,548 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 15:50:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:50:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 15:50:05,548 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 15:50:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 15:50:05,549 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 15:50:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 15:50:05,549 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 15:50:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 15:50:05,550 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 15:50:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 15:50:05,550 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 15:50:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 15:50:05,551 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 15:50:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 15:50:05,551 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 15:50:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 15:50:05,551 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 15:50:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 15:50:05,552 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 15:50:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 15:50:05,553 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 15:50:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:50:05,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:50:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 15:50:05,556 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 15:50:05,775 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:50:05,777 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:50:06,970 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:50:06,991 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:50:06,992 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:50:06,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:06 BoogieIcfgContainer [2021-11-19 15:50:06,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:50:06,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:50:06,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:50:07,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:50:07,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:50:04" (1/3) ... [2021-11-19 15:50:07,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a318e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:07, skipping insertion in model container [2021-11-19 15:50:07,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:05" (2/3) ... [2021-11-19 15:50:07,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a318e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:07, skipping insertion in model container [2021-11-19 15:50:07,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:06" (3/3) ... [2021-11-19 15:50:07,006 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product27.cil.c [2021-11-19 15:50:07,012 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:50:07,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:50:07,079 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:50:07,088 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 15:50:07,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:50:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 569 states, 447 states have (on average 1.691275167785235) internal successors, (756), 468 states have internal predecessors, (756), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-19 15:50:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 15:50:07,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:07,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:07,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash -289934377, now seen corresponding path program 1 times [2021-11-19 15:50:07,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:07,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523017886] [2021-11-19 15:50:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:07,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:07,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:07,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:07,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:50:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:50:07,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:07,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:08,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:08,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523017886] [2021-11-19 15:50:08,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523017886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:08,236 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:08,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 15:50:08,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018525329] [2021-11-19 15:50:08,239 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:08,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:50:08,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:50:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:50:08,282 INFO L87 Difference]: Start difference. First operand has 569 states, 447 states have (on average 1.691275167785235) internal successors, (756), 468 states have internal predecessors, (756), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 15:50:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:08,396 INFO L93 Difference]: Finished difference Result 590 states and 978 transitions. [2021-11-19 15:50:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:50:08,399 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 102 [2021-11-19 15:50:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:08,432 INFO L225 Difference]: With dead ends: 590 [2021-11-19 15:50:08,432 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 15:50:08,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 202 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 15:50:08,457 INFO L933 BasicCegarLoop]: 939 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, 939 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 15:50:08,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:50:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 15:50:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 15:50:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 441 states have (on average 1.689342403628118) internal successors, (745), 460 states have internal predecessors, (745), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 15:50:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 932 transitions. [2021-11-19 15:50:08,591 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 932 transitions. Word has length 102 [2021-11-19 15:50:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:08,594 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 932 transitions. [2021-11-19 15:50:08,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-19 15:50:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 932 transitions. [2021-11-19 15:50:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 15:50:08,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:08,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:08,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:08,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:08,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2089053099, now seen corresponding path program 1 times [2021-11-19 15:50:08,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:08,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345859006] [2021-11-19 15:50:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:08,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:08,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:08,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:08,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:50:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:09,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:50:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:09,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:09,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345859006] [2021-11-19 15:50:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345859006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:09,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:09,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:50:09,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736790295] [2021-11-19 15:50:09,829 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:09,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:09,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:09,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:50:09,833 INFO L87 Difference]: Start difference. First operand 561 states and 932 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 15:50:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:09,971 INFO L93 Difference]: Finished difference Result 1106 states and 1842 transitions. [2021-11-19 15:50:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 104 [2021-11-19 15:50:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:09,979 INFO L225 Difference]: With dead ends: 1106 [2021-11-19 15:50:09,980 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 15:50:09,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:09,987 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 25 mSDsluCounter, 1834 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2753 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:09,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 2753 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:50:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 15:50:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 15:50:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 441 states have (on average 1.6757369614512472) internal successors, (739), 460 states have internal predecessors, (739), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 15:50:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 926 transitions. [2021-11-19 15:50:10,039 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 926 transitions. Word has length 104 [2021-11-19 15:50:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:10,041 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 926 transitions. [2021-11-19 15:50:10,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 15:50:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 926 transitions. [2021-11-19 15:50:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 15:50:10,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:10,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:10,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:10,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:10,268 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1236640105, now seen corresponding path program 1 times [2021-11-19 15:50:10,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:10,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230144411] [2021-11-19 15:50:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:10,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:10,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:10,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:10,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:50:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:10,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:50:10,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:10,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:11,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:11,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230144411] [2021-11-19 15:50:11,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230144411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:11,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:11,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:50:11,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234676214] [2021-11-19 15:50:11,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:11,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:50:11,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:50:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:50:11,221 INFO L87 Difference]: Start difference. First operand 561 states and 926 transitions. Second operand has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:50:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:11,450 INFO L93 Difference]: Finished difference Result 1064 states and 1759 transitions. [2021-11-19 15:50:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:50:11,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 109 [2021-11-19 15:50:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:11,460 INFO L225 Difference]: With dead ends: 1064 [2021-11-19 15:50:11,461 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 15:50:11,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:50:11,468 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 117 mSDsluCounter, 8045 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 8958 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:11,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 8958 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 15:50:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 15:50:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 435 states have (on average 1.6689655172413793) internal successors, (726), 454 states have internal predecessors, (726), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 15:50:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 913 transitions. [2021-11-19 15:50:11,526 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 913 transitions. Word has length 109 [2021-11-19 15:50:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:11,528 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 913 transitions. [2021-11-19 15:50:11,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:50:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 913 transitions. [2021-11-19 15:50:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 15:50:11,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:11,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:11,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:11,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:11,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash -338982854, now seen corresponding path program 1 times [2021-11-19 15:50:11,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:11,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183836090] [2021-11-19 15:50:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:11,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:11,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:11,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:11,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:50:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:50:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:12,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:12,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:12,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183836090] [2021-11-19 15:50:12,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183836090] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:12,650 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:12,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:50:12,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784180298] [2021-11-19 15:50:12,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:12,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:12,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:12,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:12,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:50:12,655 INFO L87 Difference]: Start difference. First operand 555 states and 913 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 15:50:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:12,846 INFO L93 Difference]: Finished difference Result 1067 states and 1760 transitions. [2021-11-19 15:50:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 110 [2021-11-19 15:50:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:12,852 INFO L225 Difference]: With dead ends: 1067 [2021-11-19 15:50:12,853 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 15:50:12,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:12,863 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 112 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 4268 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:12,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 4268 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 15:50:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 15:50:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 435 states have (on average 1.6137931034482758) internal successors, (702), 454 states have internal predecessors, (702), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 15:50:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 889 transitions. [2021-11-19 15:50:12,899 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 889 transitions. Word has length 110 [2021-11-19 15:50:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:12,900 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 889 transitions. [2021-11-19 15:50:12,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 15:50:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 889 transitions. [2021-11-19 15:50:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 15:50:12,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:12,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:12,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:13,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:13,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash -359403905, now seen corresponding path program 1 times [2021-11-19 15:50:13,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:13,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92485746] [2021-11-19 15:50:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:13,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:13,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:13,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:13,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:50:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:13,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:50:13,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:13,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:14,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:14,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92485746] [2021-11-19 15:50:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92485746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:14,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 15:50:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667850142] [2021-11-19 15:50:14,057 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:50:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:50:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:14,059 INFO L87 Difference]: Start difference. First operand 555 states and 889 transitions. Second operand has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 15:50:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:14,174 INFO L93 Difference]: Finished difference Result 1058 states and 1722 transitions. [2021-11-19 15:50:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:50:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 112 [2021-11-19 15:50:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:14,181 INFO L225 Difference]: With dead ends: 1058 [2021-11-19 15:50:14,182 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 15:50:14,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:14,186 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 117 mSDsluCounter, 4322 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 5199 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:14,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 5199 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 15:50:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-19 15:50:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 414 states have (on average 1.6352657004830917) internal successors, (677), 433 states have internal predecessors, (677), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 15:50:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 864 transitions. [2021-11-19 15:50:14,213 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 864 transitions. Word has length 112 [2021-11-19 15:50:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:14,213 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 864 transitions. [2021-11-19 15:50:14,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 15:50:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 864 transitions. [2021-11-19 15:50:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 15:50:14,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:14,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:14,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:14,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:14,434 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:14,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1853815862, now seen corresponding path program 1 times [2021-11-19 15:50:14,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:14,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448883587] [2021-11-19 15:50:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:14,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:14,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:14,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:14,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:50:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:14,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:15,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:15,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:15,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448883587] [2021-11-19 15:50:15,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448883587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:15,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:15,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:50:15,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105056158] [2021-11-19 15:50:15,606 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:15,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:50:15,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:15,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:50:15,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:50:15,608 INFO L87 Difference]: Start difference. First operand 534 states and 864 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:50:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:15,795 INFO L93 Difference]: Finished difference Result 1031 states and 1686 transitions. [2021-11-19 15:50:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:50:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 115 [2021-11-19 15:50:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:15,802 INFO L225 Difference]: With dead ends: 1031 [2021-11-19 15:50:15,802 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 15:50:15,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:50:15,808 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 31 mSDsluCounter, 5918 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6767 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:15,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 6767 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 15:50:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-19 15:50:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 414 states have (on average 1.6328502415458936) internal successors, (676), 433 states have internal predecessors, (676), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-19 15:50:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 863 transitions. [2021-11-19 15:50:15,840 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 863 transitions. Word has length 115 [2021-11-19 15:50:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:15,841 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 863 transitions. [2021-11-19 15:50:15,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:50:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 863 transitions. [2021-11-19 15:50:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 15:50:15,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:15,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:15,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:16,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:16,063 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1773056601, now seen corresponding path program 1 times [2021-11-19 15:50:16,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:16,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860914540] [2021-11-19 15:50:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:16,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:16,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:16,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:16,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:50:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:50:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:50:16,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:50:17,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:17,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860914540] [2021-11-19 15:50:17,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860914540] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:17,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:17,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:50:17,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202258932] [2021-11-19 15:50:17,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:17,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:17,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:17,158 INFO L87 Difference]: Start difference. First operand 534 states and 863 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:50:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:18,002 INFO L93 Difference]: Finished difference Result 1027 states and 1703 transitions. [2021-11-19 15:50:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2021-11-19 15:50:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:18,010 INFO L225 Difference]: With dead ends: 1027 [2021-11-19 15:50:18,010 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 15:50:18,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:18,015 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 811 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:18,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2154 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:50:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 15:50:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-19 15:50:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 417 states have (on average 1.6282973621103118) internal successors, (679), 436 states have internal predecessors, (679), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (92), 89 states have call predecessors, (92), 91 states have call successors, (92) [2021-11-19 15:50:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 867 transitions. [2021-11-19 15:50:18,050 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 867 transitions. Word has length 116 [2021-11-19 15:50:18,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:18,053 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 867 transitions. [2021-11-19 15:50:18,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:50:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 867 transitions. [2021-11-19 15:50:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 15:50:18,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:18,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:18,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:18,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:18,274 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1773368063, now seen corresponding path program 1 times [2021-11-19 15:50:18,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:18,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384067430] [2021-11-19 15:50:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:18,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:18,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:18,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:50:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:18,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:50:18,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:50:18,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:50:19,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:19,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384067430] [2021-11-19 15:50:19,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384067430] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:19,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:19,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:50:19,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77283512] [2021-11-19 15:50:19,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:19,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:19,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:19,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:19,384 INFO L87 Difference]: Start difference. First operand 538 states and 867 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:50:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:20,174 INFO L93 Difference]: Finished difference Result 1036 states and 1710 transitions. [2021-11-19 15:50:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:20,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-19 15:50:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:20,181 INFO L225 Difference]: With dead ends: 1036 [2021-11-19 15:50:20,181 INFO L226 Difference]: Without dead ends: 543 [2021-11-19 15:50:20,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:20,186 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 812 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:20,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2155 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:50:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-19 15:50:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-19 15:50:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 421 states have (on average 1.6223277909738718) internal successors, (683), 440 states have internal predecessors, (683), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (93), 89 states have call predecessors, (93), 91 states have call successors, (93) [2021-11-19 15:50:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 872 transitions. [2021-11-19 15:50:20,217 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 872 transitions. Word has length 118 [2021-11-19 15:50:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:20,218 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 872 transitions. [2021-11-19 15:50:20,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:50:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 872 transitions. [2021-11-19 15:50:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:50:20,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:20,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:20,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:20,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:20,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1378780391, now seen corresponding path program 1 times [2021-11-19 15:50:20,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:20,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316902079] [2021-11-19 15:50:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:20,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:20,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:20,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:20,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:50:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:20,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:50:20,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:50:21,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:50:21,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:21,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316902079] [2021-11-19 15:50:21,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316902079] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:21,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:21,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:50:21,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613413991] [2021-11-19 15:50:21,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:21,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:21,496 INFO L87 Difference]: Start difference. First operand 543 states and 872 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:50:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:22,263 INFO L93 Difference]: Finished difference Result 1047 states and 1719 transitions. [2021-11-19 15:50:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:22,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-19 15:50:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:22,269 INFO L225 Difference]: With dead ends: 1047 [2021-11-19 15:50:22,269 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 15:50:22,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:22,273 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 812 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:22,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 2155 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:50:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 15:50:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 15:50:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 426 states have (on average 1.6150234741784038) internal successors, (688), 445 states have internal predecessors, (688), 96 states have call successors, (96), 27 states have call predecessors, (96), 26 states have return successors, (94), 89 states have call predecessors, (94), 91 states have call successors, (94) [2021-11-19 15:50:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 878 transitions. [2021-11-19 15:50:22,304 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 878 transitions. Word has length 120 [2021-11-19 15:50:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:22,306 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 878 transitions. [2021-11-19 15:50:22,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:50:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 878 transitions. [2021-11-19 15:50:22,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 15:50:22,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:22,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:22,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:22,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:22,533 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:22,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash -195960905, now seen corresponding path program 1 times [2021-11-19 15:50:22,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:22,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364151537] [2021-11-19 15:50:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:22,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:22,536 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:22,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:50:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:22,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:50:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:50:23,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 15:50:23,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:23,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364151537] [2021-11-19 15:50:23,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364151537] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:23,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:23,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 15:50:23,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887618179] [2021-11-19 15:50:23,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:23,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:23,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:23,633 INFO L87 Difference]: Start difference. First operand 549 states and 878 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:50:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:24,366 INFO L93 Difference]: Finished difference Result 1060 states and 1730 transitions. [2021-11-19 15:50:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:24,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 122 [2021-11-19 15:50:24,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:24,372 INFO L225 Difference]: With dead ends: 1060 [2021-11-19 15:50:24,372 INFO L226 Difference]: Without dead ends: 556 [2021-11-19 15:50:24,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:24,377 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 804 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:24,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 2155 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:50:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-19 15:50:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-11-19 15:50:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 432 states have (on average 1.6064814814814814) internal successors, (694), 451 states have internal predecessors, (694), 96 states have call successors, (96), 28 states have call predecessors, (96), 27 states have return successors, (95), 89 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-19 15:50:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 885 transitions. [2021-11-19 15:50:24,407 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 885 transitions. Word has length 122 [2021-11-19 15:50:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:24,407 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 885 transitions. [2021-11-19 15:50:24,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:50:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 885 transitions. [2021-11-19 15:50:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 15:50:24,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:24,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:24,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:24,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:24,633 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:24,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1421832665, now seen corresponding path program 1 times [2021-11-19 15:50:24,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:24,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106842963] [2021-11-19 15:50:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:24,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:24,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:24,635 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:24,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:50:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:50:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:50:25,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:50:26,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:26,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106842963] [2021-11-19 15:50:26,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106842963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:26,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1102831250] [2021-11-19 15:50:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:26,272 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:26,278 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:26,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 15:50:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:26,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:26,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:26,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:27,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1102831250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:27,387 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:50:27,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 15:50:27,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178141929] [2021-11-19 15:50:27,388 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:27,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:27,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:50:27,390 INFO L87 Difference]: Start difference. First operand 556 states and 885 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:29,442 INFO L93 Difference]: Finished difference Result 1711 states and 2808 transitions. [2021-11-19 15:50:29,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 124 [2021-11-19 15:50:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:29,458 INFO L225 Difference]: With dead ends: 1711 [2021-11-19 15:50:29,458 INFO L226 Difference]: Without dead ends: 1200 [2021-11-19 15:50:29,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:50:29,463 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 1908 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:29,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 1582 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 15:50:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-11-19 15:50:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1141. [2021-11-19 15:50:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 873 states have (on average 1.6231386025200458) internal successors, (1417), 912 states have internal predecessors, (1417), 214 states have call successors, (214), 51 states have call predecessors, (214), 53 states have return successors, (239), 208 states have call predecessors, (239), 209 states have call successors, (239) [2021-11-19 15:50:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1870 transitions. [2021-11-19 15:50:29,530 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1870 transitions. Word has length 124 [2021-11-19 15:50:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:29,531 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1870 transitions. [2021-11-19 15:50:29,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1870 transitions. [2021-11-19 15:50:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 15:50:29,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:29,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:29,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:29,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:29,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:29,951 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1127001264, now seen corresponding path program 1 times [2021-11-19 15:50:29,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:29,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181296588] [2021-11-19 15:50:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:29,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:29,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:29,953 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:29,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:50:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:50:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:50:30,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:50:31,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:31,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181296588] [2021-11-19 15:50:31,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181296588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:31,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1419401556] [2021-11-19 15:50:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:31,531 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:31,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:31,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:31,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 15:50:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:31,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:32,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:32,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1419401556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:32,592 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:50:32,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 15:50:32,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121555380] [2021-11-19 15:50:32,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:32,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:32,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:32,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:32,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:50:32,596 INFO L87 Difference]: Start difference. First operand 1141 states and 1870 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:34,761 INFO L93 Difference]: Finished difference Result 3684 states and 6210 transitions. [2021-11-19 15:50:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:34,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 125 [2021-11-19 15:50:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:34,788 INFO L225 Difference]: With dead ends: 3684 [2021-11-19 15:50:34,788 INFO L226 Difference]: Without dead ends: 2588 [2021-11-19 15:50:34,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:50:34,800 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1916 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:34,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1993 Valid, 1524 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 15:50:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-11-19 15:50:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2463. [2021-11-19 15:50:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 1846 states have (on average 1.6267605633802817) internal successors, (3003), 1935 states have internal predecessors, (3003), 508 states have call successors, (508), 97 states have call predecessors, (508), 108 states have return successors, (642), 506 states have call predecessors, (642), 503 states have call successors, (642) [2021-11-19 15:50:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 4153 transitions. [2021-11-19 15:50:34,980 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 4153 transitions. Word has length 125 [2021-11-19 15:50:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:34,981 INFO L470 AbstractCegarLoop]: Abstraction has 2463 states and 4153 transitions. [2021-11-19 15:50:34,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 4153 transitions. [2021-11-19 15:50:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 15:50:34,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:34,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:35,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:35,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:35,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:35,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:35,404 INFO L85 PathProgramCache]: Analyzing trace with hash 577166331, now seen corresponding path program 1 times [2021-11-19 15:50:35,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:35,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409163429] [2021-11-19 15:50:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:35,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:35,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:35,407 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:35,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:50:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:50:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:50:36,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:50:36,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:36,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409163429] [2021-11-19 15:50:36,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409163429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:36,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1957706484] [2021-11-19 15:50:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:36,944 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:36,945 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:36,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 15:50:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:37,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:37,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:38,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1957706484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:38,037 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:50:38,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 15:50:38,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646496692] [2021-11-19 15:50:38,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:38,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:38,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:38,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:50:38,040 INFO L87 Difference]: Start difference. First operand 2463 states and 4153 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:40,259 INFO L93 Difference]: Finished difference Result 8206 states and 14330 transitions. [2021-11-19 15:50:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:40,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 126 [2021-11-19 15:50:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:40,349 INFO L225 Difference]: With dead ends: 8206 [2021-11-19 15:50:40,350 INFO L226 Difference]: Without dead ends: 5788 [2021-11-19 15:50:40,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:50:40,374 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 2496 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2572 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:40,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2572 Valid, 1409 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 15:50:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2021-11-19 15:50:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 5531. [2021-11-19 15:50:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 4046 states have (on average 1.6220958971824024) internal successors, (6563), 4262 states have internal predecessors, (6563), 1258 states have call successors, (1258), 189 states have call predecessors, (1258), 226 states have return successors, (1821), 1270 states have call predecessors, (1821), 1253 states have call successors, (1821) [2021-11-19 15:50:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 9642 transitions. [2021-11-19 15:50:40,825 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 9642 transitions. Word has length 126 [2021-11-19 15:50:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:40,825 INFO L470 AbstractCegarLoop]: Abstraction has 5531 states and 9642 transitions. [2021-11-19 15:50:40,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 9642 transitions. [2021-11-19 15:50:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 15:50:40,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:40,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:40,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:41,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:41,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:41,247 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash 712156498, now seen corresponding path program 1 times [2021-11-19 15:50:41,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:41,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52760413] [2021-11-19 15:50:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:41,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:41,249 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:41,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:50:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:41,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:50:41,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:50:41,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:50:42,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:42,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52760413] [2021-11-19 15:50:42,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52760413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:42,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074858344] [2021-11-19 15:50:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:42,583 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:42,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:42,584 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:42,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 15:50:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:42,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:42,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:43,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:43,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074858344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:43,582 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:50:43,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 15:50:43,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57425591] [2021-11-19 15:50:43,583 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:43,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:43,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:50:43,585 INFO L87 Difference]: Start difference. First operand 5531 states and 9642 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:45,971 INFO L93 Difference]: Finished difference Result 18834 states and 34626 transitions. [2021-11-19 15:50:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:45,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 127 [2021-11-19 15:50:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:46,170 INFO L225 Difference]: With dead ends: 18834 [2021-11-19 15:50:46,171 INFO L226 Difference]: Without dead ends: 13348 [2021-11-19 15:50:46,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:50:46,222 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 2488 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2563 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:46,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2563 Valid, 1411 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 15:50:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13348 states. [2021-11-19 15:50:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13348 to 12855. [2021-11-19 15:50:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12855 states, 9162 states have (on average 1.6122025758568) internal successors, (14771), 9705 states have internal predecessors, (14771), 3208 states have call successors, (3208), 373 states have call predecessors, (3208), 484 states have return successors, (5418), 3266 states have call predecessors, (5418), 3203 states have call successors, (5418) [2021-11-19 15:50:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12855 states to 12855 states and 23397 transitions. [2021-11-19 15:50:47,218 INFO L78 Accepts]: Start accepts. Automaton has 12855 states and 23397 transitions. Word has length 127 [2021-11-19 15:50:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:47,219 INFO L470 AbstractCegarLoop]: Abstraction has 12855 states and 23397 transitions. [2021-11-19 15:50:47,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 12855 states and 23397 transitions. [2021-11-19 15:50:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 15:50:47,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:47,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:47,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:47,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:47,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:47,638 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:47,638 INFO L85 PathProgramCache]: Analyzing trace with hash 601888285, now seen corresponding path program 1 times [2021-11-19 15:50:47,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:47,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967607850] [2021-11-19 15:50:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:47,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:47,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:47,640 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:47,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:50:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:47,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:50:47,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:50:48,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:50:49,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:49,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967607850] [2021-11-19 15:50:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967607850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:49,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [664993213] [2021-11-19 15:50:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:49,118 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:49,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:49,120 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:49,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 15:50:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:49,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:49,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:50:50,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [664993213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:50,057 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:50:50,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 15:50:50,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049747336] [2021-11-19 15:50:50,057 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:50,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:50:50,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:50,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:50:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:50:50,059 INFO L87 Difference]: Start difference. First operand 12855 states and 23397 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:53,191 INFO L93 Difference]: Finished difference Result 44435 states and 88331 transitions. [2021-11-19 15:50:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:50:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 128 [2021-11-19 15:50:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:53,475 INFO L225 Difference]: With dead ends: 44435 [2021-11-19 15:50:53,476 INFO L226 Difference]: Without dead ends: 31615 [2021-11-19 15:50:53,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:50:53,571 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 1923 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:53,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 1467 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 15:50:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31615 states. [2021-11-19 15:50:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31615 to 30824. [2021-11-19 15:50:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30824 states, 21413 states have (on average 1.5989819268668566) internal successors, (34239), 22807 states have internal predecessors, (34239), 8350 states have call successors, (8350), 740 states have call predecessors, (8350), 1060 states have return successors, (16892), 8553 states have call predecessors, (16892), 8345 states have call successors, (16892) [2021-11-19 15:50:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30824 states to 30824 states and 59481 transitions. [2021-11-19 15:50:56,178 INFO L78 Accepts]: Start accepts. Automaton has 30824 states and 59481 transitions. Word has length 128 [2021-11-19 15:50:56,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:56,179 INFO L470 AbstractCegarLoop]: Abstraction has 30824 states and 59481 transitions. [2021-11-19 15:50:56,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 15:50:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 30824 states and 59481 transitions. [2021-11-19 15:50:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 15:50:56,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:56,210 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-19 15:50:56,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 15:50:56,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 15:50:56,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:56,613 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:56,614 INFO L85 PathProgramCache]: Analyzing trace with hash 499651806, now seen corresponding path program 1 times [2021-11-19 15:50:56,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:56,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428315719] [2021-11-19 15:50:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:56,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:56,616 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:56,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:50:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:56,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:50:56,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 15:50:57,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 15:50:58,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:58,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428315719] [2021-11-19 15:50:58,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428315719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:58,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:58,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-19 15:50:58,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589251850] [2021-11-19 15:50:58,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:58,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 15:50:58,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 15:50:58,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:50:58,111 INFO L87 Difference]: Start difference. First operand 30824 states and 59481 transitions. Second operand has 16 states, 16 states have (on average 9.0625) internal successors, (145), 12 states have internal predecessors, (145), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-19 15:51:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:20,362 INFO L93 Difference]: Finished difference Result 194655 states and 430111 transitions. [2021-11-19 15:51:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 15:51:20,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 12 states have internal predecessors, (145), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) Word has length 190 [2021-11-19 15:51:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:22,516 INFO L225 Difference]: With dead ends: 194655 [2021-11-19 15:51:22,517 INFO L226 Difference]: Without dead ends: 163876 [2021-11-19 15:51:23,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 15:51:23,239 INFO L933 BasicCegarLoop]: 1803 mSDtfsCounter, 6065 mSDsluCounter, 6151 mSDsCounter, 0 mSdLazyCounter, 12373 mSolverCounterSat, 2494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6102 SdHoareTripleChecker+Valid, 7954 SdHoareTripleChecker+Invalid, 14867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2494 IncrementalHoareTripleChecker+Valid, 12373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:23,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6102 Valid, 7954 Invalid, 14867 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2494 Valid, 12373 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-11-19 15:51:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163876 states. [2021-11-19 15:51:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163876 to 127116. [2021-11-19 15:51:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127116 states, 84684 states have (on average 1.5775471163383874) internal successors, (133593), 90962 states have internal predecessors, (133593), 38544 states have call successors, (38544), 2211 states have call predecessors, (38544), 3887 states have return successors, (96632), 39815 states have call predecessors, (96632), 38539 states have call successors, (96632) [2021-11-19 15:51:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127116 states to 127116 states and 268769 transitions. [2021-11-19 15:51:37,086 INFO L78 Accepts]: Start accepts. Automaton has 127116 states and 268769 transitions. Word has length 190 [2021-11-19 15:51:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:37,087 INFO L470 AbstractCegarLoop]: Abstraction has 127116 states and 268769 transitions. [2021-11-19 15:51:37,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0625) internal successors, (145), 12 states have internal predecessors, (145), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-19 15:51:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 127116 states and 268769 transitions. [2021-11-19 15:51:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-19 15:51:37,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:37,725 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-19 15:51:37,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:37,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:37,946 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:37,947 INFO L85 PathProgramCache]: Analyzing trace with hash -448501691, now seen corresponding path program 1 times [2021-11-19 15:51:37,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:37,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106342621] [2021-11-19 15:51:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:37,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:37,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:37,950 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:37,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9a74f20-5116-41ec-9f99-49f725a62b9f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:51:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:51:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 15:51:38,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 15:51:39,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:39,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106342621] [2021-11-19 15:51:39,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106342621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:39,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:39,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 15:51:39,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992901681] [2021-11-19 15:51:39,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:39,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:51:39,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:39,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:51:39,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:51:39,199 INFO L87 Difference]: Start difference. First operand 127116 states and 268769 transitions. Second operand has 10 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 3 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41)