./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.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_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/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_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/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_0f337cc6-42b6-4486-ad71-889be0b30869/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 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:37,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:37,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:37,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:37,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:37,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:37,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:37,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:37,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:37,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:37,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:37,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:37,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:37,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:37,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:37,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:37,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:37,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:37,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:37,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:37,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:37,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:37,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:37,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:37,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:37,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:37,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:37,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:37,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:37,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:37,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:37,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:37,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:37,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:37,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:37,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:37,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:37,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:37,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:37,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:37,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:37,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:37,609 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:37,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:37,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:37,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:37,612 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:37,612 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:37,612 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:37,613 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:37,619 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:37,619 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:37,620 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:37,621 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:37,621 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:37,621 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:37,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:37,622 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:37,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:37,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:37,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:37,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:37,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:37,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:37,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:37,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:37,624 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:37,625 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:37,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:37,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:37,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:37,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:37,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:37,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:37,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:37,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:37,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:37,629 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:37,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:37,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:37,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:37,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:37,630 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_0f337cc6-42b6-4486-ad71-889be0b30869/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2021-11-19 14:16:37,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:37,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:37,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:37,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:37,967 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:37,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-19 14:16:38,027 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data/dff32f37e/b6a713c811864a599a3e99fe411f7cc0/FLAGb466edcf2 [2021-11-19 14:16:38,628 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:38,628 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-19 14:16:38,652 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data/dff32f37e/b6a713c811864a599a3e99fe411f7cc0/FLAGb466edcf2 [2021-11-19 14:16:38,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data/dff32f37e/b6a713c811864a599a3e99fe411f7cc0 [2021-11-19 14:16:38,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:38,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:38,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:38,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:38,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:38,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:38" (1/1) ... [2021-11-19 14:16:38,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122725c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:38, skipping insertion in model container [2021-11-19 14:16:38,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:38" (1/1) ... [2021-11-19 14:16:38,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:38,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:39,424 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_0f337cc6-42b6-4486-ad71-889be0b30869/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-19 14:16:39,588 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:39,604 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 14:16:39,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11e6bd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:39, skipping insertion in model container [2021-11-19 14:16:39,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:39,606 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:16:39,608 INFO L158 Benchmark]: Toolchain (without parser) took 770.62ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 46.0MB in the beginning and 81.9MB in the end (delta: -35.9MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-11-19 14:16:39,610 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory is still 65.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:16:39,612 INFO L158 Benchmark]: CACSL2BoogieTranslator took 764.12ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 45.8MB in the beginning and 81.9MB in the end (delta: -36.1MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-11-19 14:16:39,614 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory is still 65.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 764.12ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 45.8MB in the beginning and 81.9MB in the end (delta: -36.1MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 783]: 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_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/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_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/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_0f337cc6-42b6-4486-ad71-889be0b30869/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 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:41,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:41,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:41,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:41,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:41,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:41,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:41,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:41,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:41,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:41,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:41,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:41,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:41,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:41,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:41,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:41,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:41,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:41,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:41,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:41,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:41,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:41,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:42,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:42,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:42,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:42,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:42,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:42,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:42,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:42,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:42,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:42,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:42,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:42,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:42,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:42,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:42,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:42,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:42,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:42,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:42,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:16:42,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:42,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:42,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:42,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:42,079 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:42,079 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:42,079 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:42,079 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:42,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:42,080 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:42,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:42,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:42,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:42,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:42,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:42,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:42,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:42,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:42,085 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:16:42,085 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:16:42,085 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:42,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:42,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:42,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:42,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:42,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:16:42,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:42,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:42,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:42,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:42,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:42,088 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:16:42,088 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:42,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:42,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:42,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:42,089 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_0f337cc6-42b6-4486-ad71-889be0b30869/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2021-11-19 14:16:42,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:42,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:42,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:42,473 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:42,474 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:42,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-19 14:16:42,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data/5e7bc689b/52a6bab215e7432f8f7b2fdbc4270474/FLAGa6f2bef1b [2021-11-19 14:16:43,285 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:43,287 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2021-11-19 14:16:43,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data/5e7bc689b/52a6bab215e7432f8f7b2fdbc4270474/FLAGa6f2bef1b [2021-11-19 14:16:43,440 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/data/5e7bc689b/52a6bab215e7432f8f7b2fdbc4270474 [2021-11-19 14:16:43,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:43,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:43,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:43,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:43,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:43,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4075a600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:43, skipping insertion in model container [2021-11-19 14:16:43,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:43" (1/1) ... [2021-11-19 14:16:43,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:43,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:44,029 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_0f337cc6-42b6-4486-ad71-889be0b30869/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-19 14:16:44,205 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:44,224 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:16:44,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:44,355 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_0f337cc6-42b6-4486-ad71-889be0b30869/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-19 14:16:44,428 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:44,436 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:16:44,502 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_0f337cc6-42b6-4486-ad71-889be0b30869/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2021-11-19 14:16:44,546 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:44,579 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:16:44,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44 WrapperNode [2021-11-19 14:16:44,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:44,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:44,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:16:44,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:16:44,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,732 INFO L137 Inliner]: procedures = 93, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 870 [2021-11-19 14:16:44,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:44,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:16:44,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:16:44,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:16:44,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:16:44,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:16:44,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:16:44,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:16:44,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:44,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:16:44,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:16:44,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:16:44,978 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:16:44,978 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:16:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:16:44,979 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:16:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:16:44,979 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:16:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:16:44,980 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:16:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:16:44,980 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:16:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:16:44,980 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:16:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:16:44,981 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:16:44,981 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:16:44,981 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:16:44,981 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:16:44,981 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:16:44,982 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:16:44,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:16:44,982 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:16:44,982 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:16:44,982 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:16:44,983 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:16:44,983 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:16:44,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:16:44,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:16:44,983 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:16:44,983 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:16:44,984 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 14:16:44,985 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 14:16:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:16:44,985 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:16:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:16:44,985 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 14:16:44,986 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 14:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:16:44,986 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:16:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:16:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:16:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:16:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:16:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:16:44,988 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:16:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:16:44,989 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:16:44,989 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:16:44,990 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:16:44,991 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:16:44,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:16:44,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:16:44,992 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:16:44,992 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:16:45,181 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:16:45,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:16:46,584 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:16:46,607 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:16:46,607 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:16:46,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:46 BoogieIcfgContainer [2021-11-19 14:16:46,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:16:46,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:16:46,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:16:46,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:16:46,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:16:43" (1/3) ... [2021-11-19 14:16:46,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c83bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:46, skipping insertion in model container [2021-11-19 14:16:46,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (2/3) ... [2021-11-19 14:16:46,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c83bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:46, skipping insertion in model container [2021-11-19 14:16:46,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:46" (3/3) ... [2021-11-19 14:16:46,622 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2021-11-19 14:16:46,629 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:16:46,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:16:46,701 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:16:46,712 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 14:16:46,712 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:16:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 597 states, 463 states have (on average 1.6781857451403888) internal successors, (777), 481 states have internal predecessors, (777), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-19 14:16:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:16:46,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:46,808 INFO L514 BasicCegarLoop]: trace histogram [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 14:16:46,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2006006506, now seen corresponding path program 1 times [2021-11-19 14:16:46,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:46,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616360081] [2021-11-19 14:16:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:46,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:46,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:46,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:46,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:16:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:47,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:48,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:48,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616360081] [2021-11-19 14:16:48,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616360081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:48,337 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:48,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:16:48,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026841256] [2021-11-19 14:16:48,342 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:48,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:16:48,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:16:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:48,387 INFO L87 Difference]: Start difference. First operand has 597 states, 463 states have (on average 1.6781857451403888) internal successors, (777), 481 states have internal predecessors, (777), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:48,798 INFO L93 Difference]: Finished difference Result 1197 states and 1999 transitions. [2021-11-19 14:16:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:16:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 99 [2021-11-19 14:16:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:48,822 INFO L225 Difference]: With dead ends: 1197 [2021-11-19 14:16:48,823 INFO L226 Difference]: Without dead ends: 608 [2021-11-19 14:16:48,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 187 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 14:16:48,845 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 194 mSDsluCounter, 5725 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 6695 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:48,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 6695 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-19 14:16:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 600. [2021-11-19 14:16:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 466 states have (on average 1.6695278969957081) internal successors, (778), 484 states have internal predecessors, (778), 107 states have call successors, (107), 26 states have call predecessors, (107), 26 states have return successors, (106), 102 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-19 14:16:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 991 transitions. [2021-11-19 14:16:48,959 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 991 transitions. Word has length 99 [2021-11-19 14:16:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:48,960 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 991 transitions. [2021-11-19 14:16:48,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 991 transitions. [2021-11-19 14:16:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 14:16:48,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:48,968 INFO L514 BasicCegarLoop]: trace histogram [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 14:16:48,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:49,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:49,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:49,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2109230418, now seen corresponding path program 1 times [2021-11-19 14:16:49,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:49,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784515220] [2021-11-19 14:16:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:49,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:49,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:49,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:16:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:49,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:49,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:50,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:50,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784515220] [2021-11-19 14:16:50,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784515220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:50,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:50,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:16:50,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34026721] [2021-11-19 14:16:50,229 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:50,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:16:50,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:16:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:50,232 INFO L87 Difference]: Start difference. First operand 600 states and 991 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:50,459 INFO L93 Difference]: Finished difference Result 1205 states and 2000 transitions. [2021-11-19 14:16:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:16:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 100 [2021-11-19 14:16:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:50,466 INFO L225 Difference]: With dead ends: 1205 [2021-11-19 14:16:50,466 INFO L226 Difference]: Without dead ends: 621 [2021-11-19 14:16:50,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 189 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 14:16:50,473 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 187 mSDsluCounter, 3856 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 4828 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:50,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 4828 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-11-19 14:16:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 613. [2021-11-19 14:16:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 476 states have (on average 1.665966386554622) internal successors, (793), 496 states have internal predecessors, (793), 108 states have call successors, (108), 26 states have call predecessors, (108), 28 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-19 14:16:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1010 transitions. [2021-11-19 14:16:50,523 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1010 transitions. Word has length 100 [2021-11-19 14:16:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:50,523 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1010 transitions. [2021-11-19 14:16:50,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1010 transitions. [2021-11-19 14:16:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:16:50,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:50,529 INFO L514 BasicCegarLoop]: trace histogram [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 14:16:50,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:50,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,751 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1053232070, now seen corresponding path program 1 times [2021-11-19 14:16:50,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:50,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186043029] [2021-11-19 14:16:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:50,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:50,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:50,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:16:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:51,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:51,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:51,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:51,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186043029] [2021-11-19 14:16:51,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186043029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:51,788 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:51,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:16:51,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82140265] [2021-11-19 14:16:51,789 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:51,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:16:51,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:16:51,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:51,791 INFO L87 Difference]: Start difference. First operand 613 states and 1010 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:52,069 INFO L93 Difference]: Finished difference Result 1231 states and 2039 transitions. [2021-11-19 14:16:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:16:52,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 101 [2021-11-19 14:16:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:52,078 INFO L225 Difference]: With dead ends: 1231 [2021-11-19 14:16:52,079 INFO L226 Difference]: Without dead ends: 634 [2021-11-19 14:16:52,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:16:52,088 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 174 mSDsluCounter, 5706 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:52,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 6678 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-19 14:16:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 626. [2021-11-19 14:16:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 486 states have (on average 1.662551440329218) internal successors, (808), 508 states have internal predecessors, (808), 109 states have call successors, (109), 26 states have call predecessors, (109), 30 states have return successors, (112), 104 states have call predecessors, (112), 106 states have call successors, (112) [2021-11-19 14:16:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1029 transitions. [2021-11-19 14:16:52,149 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1029 transitions. Word has length 101 [2021-11-19 14:16:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1029 transitions. [2021-11-19 14:16:52,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1029 transitions. [2021-11-19 14:16:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:16:52,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:52,159 INFO L514 BasicCegarLoop]: trace histogram [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 14:16:52,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:52,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:52,378 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1578917970, now seen corresponding path program 1 times [2021-11-19 14:16:52,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:52,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154055715] [2021-11-19 14:16:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:52,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:52,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:52,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:52,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:16:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:53,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:53,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:53,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154055715] [2021-11-19 14:16:53,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154055715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:53,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:53,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:16:53,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079333616] [2021-11-19 14:16:53,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:53,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:16:53,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:16:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:53,506 INFO L87 Difference]: Start difference. First operand 626 states and 1029 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:53,778 INFO L93 Difference]: Finished difference Result 1253 states and 2072 transitions. [2021-11-19 14:16:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:16:53,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 102 [2021-11-19 14:16:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:53,785 INFO L225 Difference]: With dead ends: 1253 [2021-11-19 14:16:53,786 INFO L226 Difference]: Without dead ends: 643 [2021-11-19 14:16:53,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 193 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 14:16:53,792 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 103 mSDsluCounter, 6679 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 7651 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:53,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 7651 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-19 14:16:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 639. [2021-11-19 14:16:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 496 states have (on average 1.659274193548387) internal successors, (823), 520 states have internal predecessors, (823), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2021-11-19 14:16:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1048 transitions. [2021-11-19 14:16:53,828 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1048 transitions. Word has length 102 [2021-11-19 14:16:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:53,829 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1048 transitions. [2021-11-19 14:16:53,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1048 transitions. [2021-11-19 14:16:53,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:16:53,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:53,835 INFO L514 BasicCegarLoop]: trace histogram [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 14:16:53,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:54,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:54,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash 398330771, now seen corresponding path program 1 times [2021-11-19 14:16:54,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:54,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809340241] [2021-11-19 14:16:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:54,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:54,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:54,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:54,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:16:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:54,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:55,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:55,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809340241] [2021-11-19 14:16:55,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809340241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:55,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:55,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:16:55,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271426485] [2021-11-19 14:16:55,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:55,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:16:55,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:55,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:16:55,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:55,016 INFO L87 Difference]: Start difference. First operand 639 states and 1048 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 14:16:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:55,192 INFO L93 Difference]: Finished difference Result 1273 states and 2102 transitions. [2021-11-19 14:16:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 102 [2021-11-19 14:16:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:55,202 INFO L225 Difference]: With dead ends: 1273 [2021-11-19 14:16:55,202 INFO L226 Difference]: Without dead ends: 650 [2021-11-19 14:16:55,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 196 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 14:16:55,208 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 150 mSDsluCounter, 5554 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6514 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:55,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 6514 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-19 14:16:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 648. [2021-11-19 14:16:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 504 states have (on average 1.6587301587301588) internal successors, (836), 529 states have internal predecessors, (836), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-19 14:16:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1065 transitions. [2021-11-19 14:16:55,250 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1065 transitions. Word has length 102 [2021-11-19 14:16:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:55,250 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1065 transitions. [2021-11-19 14:16:55,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 14:16:55,251 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1065 transitions. [2021-11-19 14:16:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:16:55,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:55,256 INFO L514 BasicCegarLoop]: trace histogram [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 14:16:55,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:55,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:55,466 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:55,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1532162910, now seen corresponding path program 1 times [2021-11-19 14:16:55,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:55,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130303064] [2021-11-19 14:16:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:55,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:55,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:55,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:55,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:16:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:55,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:16:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:56,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:56,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:56,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130303064] [2021-11-19 14:16:56,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130303064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:56,619 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:56,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:16:56,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232714241] [2021-11-19 14:16:56,620 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:56,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:16:56,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:56,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:16:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:16:56,622 INFO L87 Difference]: Start difference. First operand 648 states and 1065 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:57,002 INFO L93 Difference]: Finished difference Result 1295 states and 2136 transitions. [2021-11-19 14:16:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:16:57,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 103 [2021-11-19 14:16:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:57,031 INFO L225 Difference]: With dead ends: 1295 [2021-11-19 14:16:57,034 INFO L226 Difference]: Without dead ends: 654 [2021-11-19 14:16:57,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:16:57,045 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 178 mSDsluCounter, 9396 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 10347 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:57,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 10347 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:16:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-19 14:16:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 644. [2021-11-19 14:16:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 500 states have (on average 1.648) internal successors, (824), 525 states have internal predecessors, (824), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-19 14:16:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1053 transitions. [2021-11-19 14:16:57,089 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1053 transitions. Word has length 103 [2021-11-19 14:16:57,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:57,091 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1053 transitions. [2021-11-19 14:16:57,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:16:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1053 transitions. [2021-11-19 14:16:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:16:57,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:57,109 INFO L514 BasicCegarLoop]: trace histogram [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 14:16:57,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-19 14:16:57,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:57,322 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:57,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1228930290, now seen corresponding path program 1 times [2021-11-19 14:16:57,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:57,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518060262] [2021-11-19 14:16:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:57,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:57,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:57,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:57,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:16:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:57,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:58,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:58,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:58,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518060262] [2021-11-19 14:16:58,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518060262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:58,326 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:58,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:16:58,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960034576] [2021-11-19 14:16:58,326 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:58,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:16:58,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:16:58,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:16:58,330 INFO L87 Difference]: Start difference. First operand 644 states and 1053 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:16:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:58,432 INFO L93 Difference]: Finished difference Result 1264 states and 2071 transitions. [2021-11-19 14:16:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:58,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 103 [2021-11-19 14:16:58,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:58,438 INFO L225 Difference]: With dead ends: 1264 [2021-11-19 14:16:58,438 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 14:16:58,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:58,445 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 26 mSDsluCounter, 1913 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:58,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 2873 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 14:16:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-19 14:16:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 427 states have (on average 1.6346604215456675) internal successors, (698), 443 states have internal predecessors, (698), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:16:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 907 transitions. [2021-11-19 14:16:58,477 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 907 transitions. Word has length 103 [2021-11-19 14:16:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:58,477 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 907 transitions. [2021-11-19 14:16:58,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:16:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 907 transitions. [2021-11-19 14:16:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:16:58,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:58,484 INFO L514 BasicCegarLoop]: trace histogram [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 14:16:58,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:58,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:58,704 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:58,704 INFO L85 PathProgramCache]: Analyzing trace with hash -810022222, now seen corresponding path program 1 times [2021-11-19 14:16:58,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:58,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23074889] [2021-11-19 14:16:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:58,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:58,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:58,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:58,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:16:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:16:59,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:59,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:59,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:59,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23074889] [2021-11-19 14:16:59,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23074889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:59,870 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:59,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:16:59,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593976062] [2021-11-19 14:16:59,870 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:59,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:16:59,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:16:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:16:59,872 INFO L87 Difference]: Start difference. First operand 558 states and 907 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:17:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:00,026 INFO L93 Difference]: Finished difference Result 1103 states and 1802 transitions. [2021-11-19 14:17:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 104 [2021-11-19 14:17:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:00,032 INFO L225 Difference]: With dead ends: 1103 [2021-11-19 14:17:00,032 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 14:17:00,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 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 14:17:00,038 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 76 mSDsluCounter, 4427 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 5317 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:00,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 5317 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 14:17:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-19 14:17:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 427 states have (on average 1.6323185011709602) internal successors, (697), 443 states have internal predecessors, (697), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:17:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2021-11-19 14:17:00,062 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 104 [2021-11-19 14:17:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:00,062 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2021-11-19 14:17:00,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:17:00,063 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2021-11-19 14:17:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 14:17:00,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:00,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:00,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:00,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:00,286 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1473273379, now seen corresponding path program 1 times [2021-11-19 14:17:00,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:00,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706735509] [2021-11-19 14:17:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:00,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:00,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:00,289 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:00,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:17:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:00,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:17:00,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:17:01,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:01,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706735509] [2021-11-19 14:17:01,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706735509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:01,411 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:01,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:17:01,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952969195] [2021-11-19 14:17:01,411 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:01,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:17:01,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:17:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:01,412 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:17:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:01,587 INFO L93 Difference]: Finished difference Result 1103 states and 1800 transitions. [2021-11-19 14:17:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:01,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 105 [2021-11-19 14:17:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:01,593 INFO L225 Difference]: With dead ends: 1103 [2021-11-19 14:17:01,593 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 14:17:01,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 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 14:17:01,598 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 45 mSDsluCounter, 7963 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8853 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:01,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 8853 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 14:17:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-19 14:17:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 427 states have (on average 1.629976580796253) internal successors, (696), 443 states have internal predecessors, (696), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:17:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 905 transitions. [2021-11-19 14:17:01,623 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 905 transitions. Word has length 105 [2021-11-19 14:17:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:01,624 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 905 transitions. [2021-11-19 14:17:01,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:17:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 905 transitions. [2021-11-19 14:17:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:17:01,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:01,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:01,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:01,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:01,842 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:01,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1117583639, now seen corresponding path program 1 times [2021-11-19 14:17:01,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:01,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086520493] [2021-11-19 14:17:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:01,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:01,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:01,844 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:01,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:17:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:02,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:17:02,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:17:02,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:02,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086520493] [2021-11-19 14:17:02,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086520493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:02,906 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:02,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:17:02,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258466758] [2021-11-19 14:17:02,907 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:02,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:17:02,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:17:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:02,909 INFO L87 Difference]: Start difference. First operand 558 states and 905 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:17:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:03,097 INFO L93 Difference]: Finished difference Result 1103 states and 1798 transitions. [2021-11-19 14:17:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 106 [2021-11-19 14:17:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:03,104 INFO L225 Difference]: With dead ends: 1103 [2021-11-19 14:17:03,104 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 14:17:03,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 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 14:17:03,109 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 64 mSDsluCounter, 6204 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 7094 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:03,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 7094 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 14:17:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-19 14:17:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 427 states have (on average 1.6276346604215457) internal successors, (695), 443 states have internal predecessors, (695), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:17:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 904 transitions. [2021-11-19 14:17:03,139 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 904 transitions. Word has length 106 [2021-11-19 14:17:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:03,139 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 904 transitions. [2021-11-19 14:17:03,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-19 14:17:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 904 transitions. [2021-11-19 14:17:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:17:03,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:03,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:03,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:03,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:03,358 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:03,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:03,358 INFO L85 PathProgramCache]: Analyzing trace with hash 557726952, now seen corresponding path program 1 times [2021-11-19 14:17:03,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:03,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559525626] [2021-11-19 14:17:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:03,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:03,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:03,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:17:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:03,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:04,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:17:04,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:04,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559525626] [2021-11-19 14:17:04,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559525626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:04,316 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:04,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 14:17:04,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578021779] [2021-11-19 14:17:04,316 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:04,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:17:04,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:04,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:17:04,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:17:04,321 INFO L87 Difference]: Start difference. First operand 558 states and 904 transitions. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:17:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:07,697 INFO L93 Difference]: Finished difference Result 2311 states and 3840 transitions. [2021-11-19 14:17:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:17:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) Word has length 107 [2021-11-19 14:17:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:07,717 INFO L225 Difference]: With dead ends: 2311 [2021-11-19 14:17:07,717 INFO L226 Difference]: Without dead ends: 1771 [2021-11-19 14:17:07,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:17:07,725 INFO L933 BasicCegarLoop]: 1181 mSDtfsCounter, 2650 mSDsluCounter, 5967 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2722 SdHoareTripleChecker+Valid, 7148 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:07,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2722 Valid, 7148 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 14:17:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-11-19 14:17:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1753. [2021-11-19 14:17:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1324 states have (on average 1.600453172205438) internal successors, (2119), 1387 states have internal predecessors, (2119), 358 states have call successors, (358), 72 states have call predecessors, (358), 70 states have return successors, (375), 343 states have call predecessors, (375), 353 states have call successors, (375) [2021-11-19 14:17:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2852 transitions. [2021-11-19 14:17:07,815 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2852 transitions. Word has length 107 [2021-11-19 14:17:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:07,816 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2852 transitions. [2021-11-19 14:17:07,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:17:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2852 transitions. [2021-11-19 14:17:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:17:07,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:07,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:07,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:08,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:08,037 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash 781983570, now seen corresponding path program 1 times [2021-11-19 14:17:08,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:08,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637804057] [2021-11-19 14:17:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:08,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:08,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:08,039 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:08,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:17:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:17:08,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:08,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:17:09,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:09,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637804057] [2021-11-19 14:17:09,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637804057] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:09,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:09,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:17:09,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475944042] [2021-11-19 14:17:09,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:09,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:17:09,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:09,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:17:09,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:17:09,021 INFO L87 Difference]: Start difference. First operand 1753 states and 2852 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:17:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:10,031 INFO L93 Difference]: Finished difference Result 4740 states and 7849 transitions. [2021-11-19 14:17:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:17:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 113 [2021-11-19 14:17:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:10,057 INFO L225 Difference]: With dead ends: 4740 [2021-11-19 14:17:10,057 INFO L226 Difference]: Without dead ends: 3005 [2021-11-19 14:17:10,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:17:10,073 INFO L933 BasicCegarLoop]: 1121 mSDtfsCounter, 889 mSDsluCounter, 3756 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 4877 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:10,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 4877 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:17:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-11-19 14:17:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2995. [2021-11-19 14:17:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2255 states have (on average 1.6075388026607538) internal successors, (3625), 2367 states have internal predecessors, (3625), 617 states have call successors, (617), 117 states have call predecessors, (617), 122 states have return successors, (701), 598 states have call predecessors, (701), 610 states have call successors, (701) [2021-11-19 14:17:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 4943 transitions. [2021-11-19 14:17:10,262 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 4943 transitions. Word has length 113 [2021-11-19 14:17:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:10,263 INFO L470 AbstractCegarLoop]: Abstraction has 2995 states and 4943 transitions. [2021-11-19 14:17:10,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:17:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 4943 transitions. [2021-11-19 14:17:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:17:10,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:10,267 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:10,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:10,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:10,482 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash -918322287, now seen corresponding path program 1 times [2021-11-19 14:17:10,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:10,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453865077] [2021-11-19 14:17:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:10,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:10,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:10,484 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:10,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:17:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:10,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:17:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:11,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:17:11,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:11,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453865077] [2021-11-19 14:17:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453865077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:11,446 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:11,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:17:11,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892430598] [2021-11-19 14:17:11,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:11,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:17:11,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:11,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:17:11,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:11,449 INFO L87 Difference]: Start difference. First operand 2995 states and 4943 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 14:17:13,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:13,862 INFO L93 Difference]: Finished difference Result 10384 states and 18089 transitions. [2021-11-19 14:17:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:13,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 116 [2021-11-19 14:17:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:13,934 INFO L225 Difference]: With dead ends: 10384 [2021-11-19 14:17:13,935 INFO L226 Difference]: Without dead ends: 7407 [2021-11-19 14:17:13,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:17:13,970 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1220 mSDsluCounter, 5348 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 6721 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:13,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 6721 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 14:17:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7407 states. [2021-11-19 14:17:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7407 to 5919. [2021-11-19 14:17:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5919 states, 4457 states have (on average 1.597487098945479) internal successors, (7120), 4674 states have internal predecessors, (7120), 1204 states have call successors, (1204), 231 states have call predecessors, (1204), 257 states have return successors, (1683), 1189 states have call predecessors, (1683), 1192 states have call successors, (1683) [2021-11-19 14:17:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 10007 transitions. [2021-11-19 14:17:14,548 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 10007 transitions. Word has length 116 [2021-11-19 14:17:14,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:14,548 INFO L470 AbstractCegarLoop]: Abstraction has 5919 states and 10007 transitions. [2021-11-19 14:17:14,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-19 14:17:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 10007 transitions. [2021-11-19 14:17:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:17:14,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:14,553 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:14,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:14,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:14,771 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash 142007950, now seen corresponding path program 1 times [2021-11-19 14:17:14,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:14,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041831966] [2021-11-19 14:17:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:14,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:14,774 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:14,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:17:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:15,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:15,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:17:15,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:15,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041831966] [2021-11-19 14:17:15,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041831966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:15,599 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:15,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:17:15,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387060176] [2021-11-19 14:17:15,599 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:15,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:17:15,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:17:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:17:15,601 INFO L87 Difference]: Start difference. First operand 5919 states and 10007 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:17:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:16,019 INFO L93 Difference]: Finished difference Result 11850 states and 20277 transitions. [2021-11-19 14:17:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:17:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 118 [2021-11-19 14:17:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:16,080 INFO L225 Difference]: With dead ends: 11850 [2021-11-19 14:17:16,081 INFO L226 Difference]: Without dead ends: 5949 [2021-11-19 14:17:16,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:16,128 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 30 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:16,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1752 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5949 states. [2021-11-19 14:17:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5949 to 5939. [2021-11-19 14:17:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 4472 states have (on average 1.5943649373881932) internal successors, (7130), 4689 states have internal predecessors, (7130), 1204 states have call successors, (1204), 241 states have call predecessors, (1204), 262 states have return successors, (1662), 1184 states have call predecessors, (1662), 1192 states have call successors, (1662) [2021-11-19 14:17:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9996 transitions. [2021-11-19 14:17:16,583 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9996 transitions. Word has length 118 [2021-11-19 14:17:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:16,583 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 9996 transitions. [2021-11-19 14:17:16,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:17:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9996 transitions. [2021-11-19 14:17:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:17:16,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:16,587 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:16,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:16,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:16,805 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:16,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:16,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1553151104, now seen corresponding path program 1 times [2021-11-19 14:17:16,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:16,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908139312] [2021-11-19 14:17:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:16,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:16,809 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:16,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:17:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:17:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:17:17,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:17,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:17,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908139312] [2021-11-19 14:17:17,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908139312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:17,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:17,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:17:17,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136475525] [2021-11-19 14:17:17,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:17,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:17:17,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:17,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:17:17,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:17,767 INFO L87 Difference]: Start difference. First operand 5939 states and 9996 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 14:17:20,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:20,048 INFO L93 Difference]: Finished difference Result 20803 states and 37610 transitions. [2021-11-19 14:17:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:20,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 125 [2021-11-19 14:17:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:20,169 INFO L225 Difference]: With dead ends: 20803 [2021-11-19 14:17:20,169 INFO L226 Difference]: Without dead ends: 14882 [2021-11-19 14:17:20,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:17:20,222 INFO L933 BasicCegarLoop]: 1384 mSDtfsCounter, 1186 mSDsluCounter, 4645 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 6029 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:20,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 6029 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:17:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14882 states. [2021-11-19 14:17:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14882 to 11862. [2021-11-19 14:17:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11862 states, 8931 states have (on average 1.5875041988579106) internal successors, (14178), 9363 states have internal predecessors, (14178), 2383 states have call successors, (2383), 479 states have call predecessors, (2383), 547 states have return successors, (4045), 2371 states have call predecessors, (4045), 2361 states have call successors, (4045) [2021-11-19 14:17:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11862 states to 11862 states and 20606 transitions. [2021-11-19 14:17:21,207 INFO L78 Accepts]: Start accepts. Automaton has 11862 states and 20606 transitions. Word has length 125 [2021-11-19 14:17:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:21,208 INFO L470 AbstractCegarLoop]: Abstraction has 11862 states and 20606 transitions. [2021-11-19 14:17:21,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 6 states have internal predecessors, (147), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-19 14:17:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 11862 states and 20606 transitions. [2021-11-19 14:17:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:17:21,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:21,213 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:21,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:21,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:21,431 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash -576711990, now seen corresponding path program 1 times [2021-11-19 14:17:21,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:21,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515960082] [2021-11-19 14:17:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:21,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:21,433 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:21,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:17:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:21,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:17:22,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:17:22,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:22,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515960082] [2021-11-19 14:17:22,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515960082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:22,411 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:22,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:17:22,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096261637] [2021-11-19 14:17:22,411 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:22,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:17:22,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:22,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:17:22,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:17:22,413 INFO L87 Difference]: Start difference. First operand 11862 states and 20606 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:17:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:23,382 INFO L93 Difference]: Finished difference Result 23826 states and 42012 transitions. [2021-11-19 14:17:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:17:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2021-11-19 14:17:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:23,467 INFO L225 Difference]: With dead ends: 23826 [2021-11-19 14:17:23,467 INFO L226 Difference]: Without dead ends: 11982 [2021-11-19 14:17:23,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:23,587 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 34 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:23,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1750 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11982 states. [2021-11-19 14:17:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11982 to 11962. [2021-11-19 14:17:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11962 states, 9021 states have (on average 1.5827513579425785) internal successors, (14278), 9433 states have internal predecessors, (14278), 2383 states have call successors, (2383), 519 states have call predecessors, (2383), 557 states have return successors, (4015), 2361 states have call predecessors, (4015), 2361 states have call successors, (4015) [2021-11-19 14:17:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11962 states to 11962 states and 20676 transitions. [2021-11-19 14:17:24,442 INFO L78 Accepts]: Start accepts. Automaton has 11962 states and 20676 transitions. Word has length 128 [2021-11-19 14:17:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:24,443 INFO L470 AbstractCegarLoop]: Abstraction has 11962 states and 20676 transitions. [2021-11-19 14:17:24,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:17:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 11962 states and 20676 transitions. [2021-11-19 14:17:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:17:24,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:24,448 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:24,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:24,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:24,670 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1865076487, now seen corresponding path program 1 times [2021-11-19 14:17:24,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:24,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034116101] [2021-11-19 14:17:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:24,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:24,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:24,673 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:24,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:17:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:24,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:17:24,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:17:25,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:25,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:25,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034116101] [2021-11-19 14:17:25,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034116101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:25,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:25,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:17:25,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007838029] [2021-11-19 14:17:25,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:25,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:17:25,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:17:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:25,566 INFO L87 Difference]: Start difference. First operand 11962 states and 20676 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 14:17:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:29,064 INFO L93 Difference]: Finished difference Result 41821 states and 79615 transitions. [2021-11-19 14:17:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 136 [2021-11-19 14:17:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:29,286 INFO L225 Difference]: With dead ends: 41821 [2021-11-19 14:17:29,286 INFO L226 Difference]: Without dead ends: 29877 [2021-11-19 14:17:29,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:17:29,405 INFO L933 BasicCegarLoop]: 1376 mSDtfsCounter, 1165 mSDsluCounter, 5613 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 6989 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:29,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 6989 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:17:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29877 states. [2021-11-19 14:17:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29877 to 23993. [2021-11-19 14:17:31,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23993 states, 18089 states have (on average 1.5765935098678756) internal successors, (28519), 18921 states have internal predecessors, (28519), 4746 states have call successors, (4746), 1035 states have call predecessors, (4746), 1157 states have return successors, (10036), 4740 states have call predecessors, (10036), 4704 states have call successors, (10036) [2021-11-19 14:17:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23993 states to 23993 states and 43301 transitions. [2021-11-19 14:17:31,626 INFO L78 Accepts]: Start accepts. Automaton has 23993 states and 43301 transitions. Word has length 136 [2021-11-19 14:17:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:31,626 INFO L470 AbstractCegarLoop]: Abstraction has 23993 states and 43301 transitions. [2021-11-19 14:17:31,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 14:17:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 23993 states and 43301 transitions. [2021-11-19 14:17:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:17:31,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:31,631 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:31,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:31,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:31,850 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1850064972, now seen corresponding path program 1 times [2021-11-19 14:17:31,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:31,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292032592] [2021-11-19 14:17:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:31,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:31,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:31,853 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:31,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:17:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:32,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 14:17:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:17:32,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:32,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292032592] [2021-11-19 14:17:32,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292032592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:32,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:32,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:17:32,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081542726] [2021-11-19 14:17:32,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:32,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:17:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:17:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:17:32,686 INFO L87 Difference]: Start difference. First operand 23993 states and 43301 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:17:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:34,268 INFO L93 Difference]: Finished difference Result 48208 states and 88912 transitions. [2021-11-19 14:17:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:17:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 139 [2021-11-19 14:17:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:34,414 INFO L225 Difference]: With dead ends: 48208 [2021-11-19 14:17:34,415 INFO L226 Difference]: Without dead ends: 24233 [2021-11-19 14:17:34,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:34,647 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 34 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:34,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1750 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24233 states. [2021-11-19 14:17:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24233 to 24193. [2021-11-19 14:17:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24193 states, 18269 states have (on average 1.5720072253544255) internal successors, (28719), 19101 states have internal predecessors, (28719), 4746 states have call successors, (4746), 1075 states have call predecessors, (4746), 1177 states have return successors, (10000), 4720 states have call predecessors, (10000), 4704 states have call successors, (10000) [2021-11-19 14:17:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24193 states to 24193 states and 43465 transitions. [2021-11-19 14:17:36,861 INFO L78 Accepts]: Start accepts. Automaton has 24193 states and 43465 transitions. Word has length 139 [2021-11-19 14:17:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:36,862 INFO L470 AbstractCegarLoop]: Abstraction has 24193 states and 43465 transitions. [2021-11-19 14:17:36,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:17:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 24193 states and 43465 transitions. [2021-11-19 14:17:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 14:17:36,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:36,866 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:36,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:37,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:37,082 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash -269533144, now seen corresponding path program 1 times [2021-11-19 14:17:37,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:37,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058703909] [2021-11-19 14:17:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:37,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:37,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:37,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:37,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:17:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:17:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:17:37,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:17:38,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:38,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058703909] [2021-11-19 14:17:38,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058703909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:38,167 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:38,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:17:38,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073874535] [2021-11-19 14:17:38,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:38,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:17:38,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:17:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:38,169 INFO L87 Difference]: Start difference. First operand 24193 states and 43465 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:17:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:44,074 INFO L93 Difference]: Finished difference Result 84259 states and 173137 transitions. [2021-11-19 14:17:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 149 [2021-11-19 14:17:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:44,681 INFO L225 Difference]: With dead ends: 84259 [2021-11-19 14:17:44,681 INFO L226 Difference]: Without dead ends: 60084 [2021-11-19 14:17:45,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:17:45,154 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 1232 mSDsluCounter, 4982 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 6216 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:45,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1305 Valid, 6216 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:17:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-11-19 14:17:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 48600. [2021-11-19 14:17:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48600 states, 36685 states have (on average 1.5666348643859889) internal successors, (57472), 38377 states have internal predecessors, (57472), 9477 states have call successors, (9477), 2147 states have call predecessors, (9477), 2437 states have return successors, (26013), 9483 states have call predecessors, (26013), 9395 states have call successors, (26013) [2021-11-19 14:17:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48600 states to 48600 states and 92962 transitions. [2021-11-19 14:17:49,848 INFO L78 Accepts]: Start accepts. Automaton has 48600 states and 92962 transitions. Word has length 149 [2021-11-19 14:17:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 48600 states and 92962 transitions. [2021-11-19 14:17:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 6 states have internal predecessors, (167), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:17:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 48600 states and 92962 transitions. [2021-11-19 14:17:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:17:49,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:49,879 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:49,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:50,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:50,080 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2036557838, now seen corresponding path program 1 times [2021-11-19 14:17:50,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:50,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453053156] [2021-11-19 14:17:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:50,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:50,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:50,084 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:50,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:17:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:50,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:17:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:17:50,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:17:51,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:51,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453053156] [2021-11-19 14:17:51,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453053156] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:51,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:51,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:17:51,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521427349] [2021-11-19 14:17:51,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:51,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:17:51,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:17:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:17:51,142 INFO L87 Difference]: Start difference. First operand 48600 states and 92962 transitions. Second operand has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-19 14:17:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:58,424 INFO L93 Difference]: Finished difference Result 110748 states and 229798 transitions. [2021-11-19 14:17:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:17:58,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 150 [2021-11-19 14:17:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:58,977 INFO L225 Difference]: With dead ends: 110748 [2021-11-19 14:17:58,978 INFO L226 Difference]: Without dead ends: 62166 [2021-11-19 14:17:59,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:59,791 INFO L933 BasicCegarLoop]: 1330 mSDtfsCounter, 1731 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 4576 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:59,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1818 Valid, 4576 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:17:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62166 states. [2021-11-19 14:18:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62166 to 53028. [2021-11-19 14:18:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53028 states, 40095 states have (on average 1.5663299663299664) internal successors, (62802), 41883 states have internal predecessors, (62802), 10165 states have call successors, (10165), 2451 states have call predecessors, (10165), 2767 states have return successors, (31659), 10101 states have call predecessors, (31659), 10083 states have call successors, (31659) [2021-11-19 14:18:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53028 states to 53028 states and 104626 transitions. [2021-11-19 14:18:04,211 INFO L78 Accepts]: Start accepts. Automaton has 53028 states and 104626 transitions. Word has length 150 [2021-11-19 14:18:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:04,212 INFO L470 AbstractCegarLoop]: Abstraction has 53028 states and 104626 transitions. [2021-11-19 14:18:04,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-19 14:18:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 53028 states and 104626 transitions. [2021-11-19 14:18:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:18:04,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:04,215 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:18:04,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:04,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:18:04,430 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2086058186, now seen corresponding path program 1 times [2021-11-19 14:18:04,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:04,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956286607] [2021-11-19 14:18:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:04,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:04,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:04,433 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:04,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f337cc6-42b6-4486-ad71-889be0b30869/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:18:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:18:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:18:05,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 14:18:06,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:06,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956286607] [2021-11-19 14:18:06,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956286607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:18:06,972 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:18:06,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-19 14:18:06,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722448769] [2021-11-19 14:18:06,972 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:18:06,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:18:06,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:06,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:18:06,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:18:06,974 INFO L87 Difference]: Start difference. First operand 53028 states and 104626 transitions. Second operand has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-19 14:18:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:15,167 INFO L93 Difference]: Finished difference Result 125081 states and 254714 transitions. [2021-11-19 14:18:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:18:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 154 [2021-11-19 14:18:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:15,659 INFO L225 Difference]: With dead ends: 125081 [2021-11-19 14:18:15,659 INFO L226 Difference]: Without dead ends: 72071 [2021-11-19 14:18:16,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:18:16,412 INFO L933 BasicCegarLoop]: 1113 mSDtfsCounter, 1039 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 3956 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:16,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 3956 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 14:18:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72071 states.